-
DAY3 2/5 Risk Area Posted
From
Mike Powell@618:250/1 to
All on Sun May 4 08:33:00 2025
ACUS03 KWNS 040733
SWODY3
SPC AC 040733
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0233 AM CDT Sun May 04 2025
Valid 061200Z - 071200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PARTS OF
CENTRAL INTO EAST TEXAS...
...SUMMARY...
Severe thunderstorms are possible across much of Central into East
Texas and western/central Louisiana. All severe hazards would be possible.
...Synopsis...
An ejecting shortwave trough will lift northeastward through Central
into Northeast Texas on Tuesday. Continued moisture advection
northward will bring upper 60s to low 70s dewpoints in
South/Central/Southeast Texas and parts of the lower Mississippi
Valley. Early period precipitation appears likely along a warm front
within the Red River region southeastward into Louisiana. Additional
early precipitation is possible within the Edwards Plateau into
Central Texas, but uncertainty is greater in this scenario. A
dryline is expected in central Texas during the afternoon.
...Central Texas into Sabine Valley...
The expectation of early day precipitation complicates the overall
forecast for the afternoon. Even so, a very moist and weakly capped
airmass is forecast to be in place south of the warm front and east
of the developing dryline. The ECMWF is more aggressive with the
early development of a cluster of storms/MCS. In this scenario,
convection would likely strengthen as surface heating occurs ahead
of it. The GFS/NAM show greater potential for the dryline to be a
focus for convection during the afternoon. Here, supercells capable
of all hazards would be possible. There is potential for significant
severe, with very large hail being the primary concern, but
uncertainty in the convective evolution keeps confidence too low to
highlight any particularly area.
...Red River into ArkLaTex...
Storms along the warm front will likely be ongoing early in the day
and continue to develop within the warm advection regime into the
afternoon. Strong shear and moderate buoyancy would promote a risk
for large hail and damaging winds. Numerous storms and their
interactions will tend to temper the overall severe threat. Many of
these storms will be at least slightly elevated north of the
boundary. Tornadoes could also occur with surface-based storms
within the warm front zone.
..Wendt.. 05/04/2025
$$
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From
Mike Powell@618:250/1 to
All on Fri Jun 13 07:52:00 2025
ACUS03 KWNS 130729
SWODY3
SPC AC 130728
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0228 AM CDT Fri Jun 13 2025
Valid 151200Z - 161200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
SOUTHEAST MONTANA...THE DAKOTAS AND NORTHERN NEBRASKA...
...SUMMARY...
Scattered severe storms, capable of isolated large hail and severe
wind gusts, are expected on Sunday from parts of southeast Montana southeastward into northern Nebraska. Elsewhere in the Great Plains,
marginally severe storms will be possible. A few severe wind gusts
may also occur from parts of North Carolina into southern Virginia.
...Northern Plains/Northern Nebraska...
A mid-level ridge is forecast to remain over the central and
northern High Plains on Sunday, as a subtle shortwave trough rides
up and over the ridge. At the surface, a low is forecast to develop
over Wyoming, with upslope flow remaining over much of the northern
Plains. A moist airmass will be located from eastern Montana into
the Dakotas and Nebraska, where moderate to strong instability is
forecast to develop by afternoon. As surface temperatures warm
during the day, convective initiation is expected in the higher
terrain of the northern High Plains, with additional storms possible
further east into parts of the Dakotas. NAM forecast soundings late
Sunday afternoon near the instability axis have MLCAPE peaking near
4000 J/kg with 700-500 mb lapse rates near 8 C/km. 0-6 km shear is
forecast to be in the 30 to 40 knot range. This environment should
support supercell development, with large hail and wind damage being
possible. A tornado could also occur. The severe threat will likely
persist into the evening, as low-level flow gradually increases
across the region.
...Southern Nebraska/Kansas/Oklahoma/North Texas...
A moist airmass will remain in place across much of the southern and
central Plains on Sunday. Surface dewpoints from the upper 60s to
the mid 70s F will contribute to the development of strong
instability across parts of this airmass by afternoon. In spite of a
lack of large-scale ascent, isolated convective initiation will be
possible as surface temperatures peak in the afternoon. The most
likely location for storm development would be along or near any
residual outflow boundary. Forecast MLCAPE in the 2500 to 3500 J/kg
range, along with steep low to mid-level lapse rates, and moderate
deep-layer shear would support an isolated severe threat. Hail and
marginally severe wind gusts would be the primary threats.
...North Carolina/Southern Virginia...
A mid-level shortwave trough is forecast to move eastward across the
southern and central Appalachians on Sunday. Ahead of the trough, a
moist airmass is forecast over parts of the Carolinas and Virginia.
As surface temperatures warm in the late morning and early
afternoon, convective initiation is expected in the higher terrain
of the southern and central Appalachians. As this convection moves
eastward into the lower elevations, thunderstorms are expected to
form. Although deep-layer shear is forecast to remain relatively
weak, moderate instability and steep low-level lapse rates could be
sufficient for isolated severe wind gusts.
..Broyles.. 06/13/2025
$$
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From
Mike Powell@618:250/1 to
All on Tue Feb 17 08:57:22 2026
ACUS03 KWNS 170832
SWODY3
SPC AC 170831
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0231 AM CST Tue Feb 17 2026
Valid 191200Z - 201200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THURSDAY AFTERNOON
INTO EARLY EVENING ACROSS PARTS OF CENTRAL AND SOUTHERN
ILLINOIS...SOUTHERN INDIANA...WESTERN/NORTHERN KENTUCKY...AND
SOUTHWESTERN OHIO...
...SUMMARY...
Severe thunderstorms with potential to produce a few tornadoes and
damaging wind gusts are possible across parts of the middle
Mississippi into lower Ohio Valleys Thursday afternoon into early evening.
...Discussion...
Considerable spread persists within latest model output concerning
short wave developments within the evolving pattern across North
America through this period. In general, though, guidance indicates
that larger-scale mid-level troughing will slowly begin to shift
inland of the Pacific coast Thursday through Thursday night, while
being maintained downstream across the Rockies, Great Plains and
Mississippi Valley, and slowly developing toward the lower Great
Lakes and Appalachians vicinity. The center of a subtropical high
is likely to shift from the Gulf Basin into the Bahamas/Caribbean,
with its northern periphery maintaining an influence across parts of
the Southeast.
One or two short wave perturbations emerging from the Intermountain
West may be in the process of progressing into and across the
central Great Plains and lower Missouri Valley vicinity at the
outset of the period. The lower amplitude lead perturbation may
continue into and across the Ohio Valley during the day, as the
stronger upstream perturbation pivots across the mid to lower
Missouri Valley toward the Great Lakes region. This appears a bit
to the north, and at somewhat lower amplitudes, than what prior runs
of at least some model output has been indicating. However, this is
still likely to be accompanied by a sub-1000 mb surface cyclone,
which may undergo one or two periods of additional deepening while
migrating northeast of the lower Missouri Valley toward the Great
Lakes region Thursday through Thursday night.
...Middle Mississippi/Lower Ohio Valley...
Latest model output continues to indicate better low-level moisture
return (but still marginal for severe convective development) to
portions of the warm sector of the developing cyclone as it migrates
across and northeast of the lower Missouri Valley Thursday
afternoon. It appears that this may include a corridor of mid 50s
to near 60F surface dew points advecting northeast and east of the
confluence of the Mississippi and Ohio Rivers. However, it now
appears that much of this moistening may occur beneath relatively
warm mid/upper levels, associated with subsidence to the south of
the upper jet axis.
This is not reflected in the latest RRFS forecast soundings, which
indicate rather potent thermodynamic profiles evolving by Thursday
afternoon across the lower Ohio Valley vicinity, in terms of both
conditional and convective instability. A general consensus of
other model output suggests the development of much more modest
CAPE. This includes NAM forecast soundings, which depict CAPE at or
below 500 J/kg where the low-level moistening occurs, mostly due to
low equilibrium levels below the 500 mb level. It remains unclear
if this environment will become supportive of convection capable of
producing lightning.
Even so, NAM forecast soundings still depict boundary-layer based
CAPE supportive of low-topped convection which could acquire
supercellular structure in the presence of strong cloud bearing
shear. Aided by the evolution of sizable clockwise-curved low-level
hodographs beneath 30-50 kt southerly 850 mb flow, and a relatively
moist boundary-layer with steep lapse rates, a few tornadoes appear
possible, in addition to small to marginally severe hail. The
evolution of a small organizing cluster may still not be out of the
question, which probably would be accompanied by better potential
for damaging surface gusts.
..Kerr.. 02/17/2026
$$
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From
Mike Powell@618:250/6 to
All on Thu Apr 16 08:33:08 2026
ACUS03 KWNS 160707
SWODY3
SPC AC 160705
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0205 AM CDT Thu Apr 16 2026
Valid 181200Z - 191200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
THE OHIO VALLEY...
...SUMMARY...
Isolated strong to severe thunderstorms capable of damaging winds
and hail will be possible on Saturday across part of the Ohio Valley.
...Ohio Valley...
A large-scale upper trough oriented over the Upper Midwest and
Plains will shift east over the Great Lakes, Midwest and TN Valley
on Saturday/Saturday night. Strong deep-layer southwesterly flow
will overspread the Ohio Valley ahead of an eastward-advancing cold
front. This front should be located from Lower MI into southeast MO
Saturday morning, moving across the Ohio Valley through early
evening. Modest boundary-layer moisture will be in place ahead of
the front. Daytime heating into the 70s and modestly steep midlevel
lapse rates will support weak destabilization (generally less than
1000 J/kg MLCAPE). While instability will be modest, strong low and
midlevel flow will support organized cells and/or line segments
capable of strong gusts. Any discrete cellular activity also may
produce marginally severe hail. These severe risk should gradually
wane during the evening with eastward extent.
...TX to the Lower MS Valley...
Thunderstorms are expected along a southeast-advancing cold front
Saturday afternoon and evening. Deep-layer flow will be oriented
parallel to the front, and convection may largely be anafrontal or
quickly undercut by the front. While weak MUCAPE is noted in
forecast soundings, severe potential is not expected at this time.
..Leitman.. 04/16/2026
$$
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From
Mike Powell@618:250/6 to
All on Wed Apr 22 08:04:58 2026
ACUS03 KWNS 220722
SWODY3
SPC AC 220721
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0221 AM CDT Wed Apr 22 2026
Valid 241200Z - 251200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
THE SOUTHERN PLAINS INTO THE LOWER MISSISSIPPI VALLEY...
...SUMMARY...
A few severe thunderstorms will be possible across portions of the
Southern Plains into the Lower Mississippi Valley on Saturday. Large
hail and damaging wind gusts should be the primary threats.
... Synopsis ...
A persistent longwave trough will remain situated across the
northern US on Friday, maintaining a broad regime of cyclonic
midlevel flow over the western two-thirds of the country. Within
this broad flow, neutral to modest midlevel height rises are likely
across the Southern Plains. This evolution suggests a lack of robust large-scale forcing for ascent, with subtle subsidence potentially
acting as a limiting factor for widespread convective coverage.
... Southern Plains into the Lower Mississippi Valley ...
At the start of the forecast period, convective activity may be
ongoing across portions of northeast Oklahoma, southeast Kansas,
southern Missouri, or northern Arkansas along a consolidated outflow boundary/cold front. These storms should slowly weaken during the
morning with the loss of large-scale ascent and a weakening
low-level jet. The outflow boundary/cold front should slowly sag
south through the morning before stalling somewhere in the vicinity
of the I40 corridor. This feature will serve as the primary focus
for subsequent development later in the afternoon, with residual
outflow or differential heating boundaries being a secondary source
of initiation.
South of the frontal boundary, a highly unstable airmass will remain
in place across the warm sector. Strong diabatic heating of a moist
boundary layer will yield pockets of moderate-to-strong instability,
with MUCAPE values potentially in the 2000-3000 J/kg range. While
deep-layer shear is forecast to remain relatively modest (30-35
knots), the degree of instability will be sufficient to support
robust updrafts.
Given the modest shear and lack of stronger synoptic support, storm
modes will likely be multicell clusters or transient supercells. Any
persistent cell will be capable of producing large hail and
localized damaging wind gusts
... Lower Mississippi Valley ...
Convection that develops across Oklahoma and Arkansas during the
afternoon is expected to persist into the evening as it moves slowly east-southeast toward Mississippi and Tennessee. Although
instability is not as great with eastward extent, it should remain
sufficient enough to support some potential for sporadic wind and
hail through the overnight hours.
..Marsh.. 04/22/2026
$$
--- MultiMail/DOS
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From
Mike Powell@618:250/6 to
All on Sun May 3 09:12:58 2026
ACUS03 KWNS 030647
SWODY3
SPC AC 030646
Day 3 Convective Outlook CORR 1
NWS Storm Prediction Center Norman OK
0146 AM CDT Sun May 03 2026
Valid 051200Z - 061200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
EASTERN OKLAHOMA...NORTHEAST TEXAS...AND ARKANSAS...
CORRECTED FOR SUMMARY
...SUMMARY...
Isolated to scattered strong to severe storms are possible Tuesday
afternoon and evening across portions of eastern Oklahoma and
northeast Texas into the Mid-South.
...Synopsis...
Deep-layer southwesterly flow will increase across the southern
Plains to the Ohio Valley and Northeast as the upper trough over the
Upper Midwest and northern/central Plains and an upper trough over
the Southwest begin to phase. At the surface, a cold front is
forecast to extend from southern Lower MI to northern OK Tuesday
morning. This boundary will develop slowly southeast through the
period, becoming oriented from NY to the Mid-South to north-central
TX by Wednesday morning. During the afternoon, a dryline will be
oriented across central TX. Ahead of the surface front and east of
the dryline, increasing southerly low-level flow will transport 60s
F dewpoints across the Sabine Valley into AR. The surface front and
dryline will serve as a focus for strong to severe thunderstorm
development during the afternoon/evening.
...OK/TX to the Mid-South...
Convective development is likely near the surface triple point and
cold front by 00z as forcing for ascent impinges on the moist and
moderately unstable airmass in the eastern OK/AR vicinity.
Thunderstorm coverage will likely increase through the evening as a
modest low-level jet develops. Any discrete convection that develops
will pose a risk for large hail and perhaps a tornado or two.
However, convection may become linear along the surface front rather
quickly, with an accompanying increase in damaging wind potential.
Severe potential along the dryline across parts of OK/TX is more uncertain/conditional. Capping and nebulous large-scale ascent
(especially with southwest extent across TX) may suppress
convection. However, if a storm can develop within the favorable
thermodynamic and kinematic parameter space, large hail will be possible.
..Leitman.. 05/03/2026
$$
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From
Mike Powell@618:250/6 to
All on Mon May 4 10:05:26 2026
ACUS03 KWNS 040620
SWODY3
SPC AC 040619
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0119 AM CDT Mon May 04 2026
Valid 061200Z - 071200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM EAST TEXAS
INTO PARTS OF ALABAMA...
...SUMMARY...
Scattered strong to severe thunderstorms are expected Wednesday
afternoon and evening across portions of Texas into the Lower
Mississippi and Tennessee Valleys. Damaging winds, large hail, and a
couple of tornadoes will be possible.
...Texas to the Lower MS and TN Valleys...
A midlevel shortwave trough will migrate from the central/southern
Rockies to the southern Plains on Wednesday. Strong southwesterly
deep-layer flow will overspread the southern Plains into much of the
southern and eastern U.S. ahead of this feature. At the surface, a
cold front will extend from the upper OH Valley southwestward to
southern AR Wednesday morning, with the western extent of the front
sloped across northeast to southwest TX. Ahead of the front, rich
Gulf moisture will be in place with dewpoints generally in the mid
60s to near 70 across TX into the Lower MS Valley, decreasing with
northeast extent. This will support a corridor of moderate
destabilization ahead of the front from parts of TX into MS where
MLCAPE around 1500-2500 J/kg is possible. Instability will be
somewhat less with northeast extent across the TN Valley.
Storm mode is somewhat uncertain Wednesday afternoon. If discrete
cells can develop, steep lapse rates, favorable thermodynamic, elongated/straight hodographs and 45+ kt effective shear magnitudes
suggest supercells with an all-hazards risk will be possible.
However, given deep layer flow parallel to the surface front and a
southward progressing front, convection may tend to become linear
quickly. This would increase damaging wind potential. Given
uncertainty in storm mode, declined introducing a CIG 1 area for
hail. In general, convection should develop during the afternoon and
spread east/southeast with time through the overnight hours, with an
accompany severe risk.
..Leitman.. 05/04/2026
$$
--- MultiMail/DOS
* Origin: Project Scorpio TEST (618:250/6)
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From
Mike Powell@618:250/10 to
All on Fri May 8 08:09:36 2026
ACUS03 KWNS 080729
SWODY3
SPC AC 080728
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0228 AM CDT Fri May 08 2026
Valid 101200Z - 111200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE SOUTHERN PLAINS AND ARK-LA-TEX...
...SUMMARY...
Thunderstorms with large hail and severe wind gusts will be possible
Sunday afternoon and evening from parts of west Texas
east-northeastward into the Ark-La-Tex. A marginal severe threat is
expected to develop over parts of the eastern Gulf Coast.
...Southern Plains/Ark-La-Tex...
At mid-levels, a shortwave trough is forecast to move southeastward
through the central U.S. on Sunday, as a cold front advances
southward across the southern Plains. South of the front, surface
dewpoints mostly in the 60s F will contribute to moderate
instability by afternoon from a dryline in west Texas
east-northeastward across much of north-central and northeast Texas.
As surface temperatures warm and low-level convergence increases
near the front, scattered thunderstorms are expected to develop
along the northern edge of the moist airmass during the afternoon
and evening.
Forecast soundings across parts of west and north-central Texas late
Sunday afternoon suggest that MLCAPE will peak in the 2000 to 3500
J/kg range with 0-6 shear around 35 knots. This, combined with
700-500 mb lapse rates near 8 C/km, should be favorable for a
large-hail threat. In addition, steep 0-3 km lapse rates should
support an isolated wind-damage threat, especially if a cold pool
can organize. The cold front position is expected to be a bit
further south than is currently forecast. This projected position is
in relatively good agreement with the most reliable guidance, which
adds confidence in a potential severe threat area in west,
north-central and northeast Texas Sunday afternoon and evening.
...Central and Eastern Gulf Coast...
Westerly mid-level flow is forecast on Sunday across the Gulf Coast
region. At the surface, a moist airmass will be in place from the
central Gulf Coast eastward to Florida. Some solutions move a subtle
shortwave trough eastward across the Southeast on Sunday. This would
support isolated to scattered thunderstorm development in the
afternoon near the coast from southeast Louisiana eastward to
southern Georgia and northern Florida. Instability and deep-layer
shear is expected to be strong enough for a marginal severe threat
during the mid to late afternoon.
..Broyles.. 05/08/2026
$$
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From
Mike Powell@618:250/10 to
All on Wed May 13 08:49:28 2026
ACUS03 KWNS 130730
SWODY3
SPC AC 130729
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0229 AM CDT Wed May 13 2026
Valid 151200Z - 161200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
EASTERN KANSAS AND NORTHERN MISSOURI...
...SUMMARY...
Severe storms with large hail and severe wind gusts will be possible
on Friday in parts of the central Plains and lower Missouri Valley.
...Southern and Central Plains/Lower Missouri and mid Mississippi Valleys...
Mid-level flow will be westerly over the central U.S. on Friday.
Within the flow, a subtle shortwave trough is forecast to move
across the central Plains. At the surface, low-level moisture
advection will result in a pocket of moist air from the central
Plains eastward into the lower Missouri Valley, where surface
dewpoints are forecast to be in the mid to upper 60s F. Within this
moist airmass, moderate instability is expected to be in place by
afternoon. A dryline is forecast to develop on the western edge of
the low-level moisture, from north-central Oklahoma into central
Kansas. Isolated to scattered thunderstorms are expected to form to
the east of the dryline during the late afternoon and early evening.
Additional storms are expected to form further east into eastern
Kansas and Missouri, along the northern edge of a low-level jet.
Late Friday afternoon, forecast soundings in the Kansas City area
show a favorable thermodynamic environment for severe storms. MLCAPE
is forecast to be in the 3000 to 4000 J/kg range with 700-500 mb
lapse rates near 8 C/km. In addition, 0-6 km shear is forecast to be
in the 30 to 35 knot range. This environment will be favorable for
supercells with large hail and wind damage. An isolated severe
threat may also develop eastward into the mid Mississippi Valley and southwestward into north-central Oklahoma. Instability is expected
to be somewhat weaker in these two areas, which should keep any
severe threat more isolated and marginal.
..Broyles.. 05/13/2026
$$
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* Origin: Capitol City Online (618:250/10)
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From
Mike Powell@618:250/10 to
All on Thu May 14 07:59:47 2026
ACUS03 KWNS 140746
SWODY3
SPC AC 140745
Day 3 Convective Outlook CORR 1
NWS Storm Prediction Center Norman OK
0245 AM CDT Thu May 14 2026
Valid 161200Z - 171200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL PLAINS INTO THE LOWER TO MID MISSOURI VALLEY...
CORRECTED FOR WORDING
...SUMMARY...
Severe storms capable of large to very large hail, wind damage and
tornadoes will be possible Saturday afternoon and evening across
parts of the central Plains and lower to mid Missouri Valley.
Hailstones up to 3 inches in diameter and a strong tornado will be
possible.
...Central Plains/Lower to Mid Missouri Valley...
An upper-level trough will dig southeastward into the western U.S.
on Saturday, as mid-level flow becomes southwesterly over the
central states. At the surface, a low will deepen in the central
High Plains, as a moist airmass remains in place from the southern
and central Plains eastward into the Mississippi Valley. A shortwave
trough is forecast to move into the central High Plains Saturday
afternoon. Ahead of the trough, thunderstorms are expected to form
in far eastern Colorado during the mid to late afternoon. These
storms are forecast to expand in coverage and move eastward across
the central Plains in the late afternoon and early evening, where
severe storm development will be possible.
By late afternoon, an axis of moderate to strong instability is
forecast from west-central Kansas east-northeastward across northern
Kansas, southeast Nebraska into far northwestern Missouri. Forecast
soundings near this axis of instability in far northern Kansas at
00Z, have MLCAPE in the 3000 to 4000 J/kg range with 0-6 km shear
around 50 knots, and 700-500 mb lapse rates near 8 C/km. This
environment will be favorable for supercells with large to very
large hail. The more intense supercell updrafts may be capable of
hailstones up to 3 inches in diameter. By early evening, a 40 to 50
knot low-level jet is forecast to develop from northwest Oklahoma
into southern Kansas. At this time, NAM forecast soundings increase
0-3 km storm-relative helicity into the 300 to 400 m2/s2 range
across parts of northern Kansas. However, other model solutions keep
this low-level jet further south in the early evening, suggesting
there is uncertainty concerning severe threat coverage and
magnitude. At this time, there does appears to be potential for
tornadoes, and possibly a strong tornado. This would be the case if
the more aggressive solutions with the low-level jet pan out. Severe
wind gusts will also be possible with supercells. During the
evening, the current thinking is that a severe convective cluster
will move east-northeastward from the central Plains into the lower
to mid Missouri Valley, where large hail and severe wind gusts will
be possible.
...Mid Mississippi and Ohio Valleys...
West to west-southwest mid-level flow will be in place from the
Great Lakes southward into the Ohio Valley on Saturday. A subtle
shortwave trough is forecast to move eastward into the mid
Mississippi Valley. Ahead of the trough, low-level moisture
advection will take place, with surface dewpoints likely increasing
into the mid 60s F over much of Illinois, Indiana and Ohio.
Scattered thunderstorms are expected to develop in the late
afternoon along the leading edge of the shortwave trough, with
storms moving eastward across the region during the evening.
Moderate deep-layer shear is forecast over an unstable airmass with
steep lapse rates. This should support an isolated severe threat
with damaging wind gusts and hail possible.
..Broyles.. 05/14/2026
$$
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