• DAY2SVR 2/5 Risk Area Posted

    From Mike Powell@618:250/6 to All on Fri Apr 3 10:18:20 2026
    ACUS02 KWNS 030550
    SWODY2
    SPC AC 030549

    Day 2 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1249 AM CDT Fri Apr 03 2026

    Valid 041200Z - 051200Z

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    THE OHIO VALLEY...

    ...SUMMARY...
    Thunderstorms with severe wind gusts and hail will be possible
    Saturday afternoon and evening in parts of the Ohio Valley.
    Thunderstorms with isolated severe gusts and hail will also be
    possible from the southern Plains into the lower Mississippi Valley.

    ...Ohio Valley/Lower Great Lakes...

    An upper-level trough will move eastward across the north-central
    U.S. on Saturday, as an associated 60 to 75 knot mid-level jet
    translates eastward through the Great Lakes. At the surface, a cold
    front will advance eastward through the Ohio Valley. Ahead of the
    front, surface dewpoints will be in the lower to mid 60s F.
    Instability will increase along the moist axis during the day, with
    SBCAPE likely peaking in the 500 to 1000 J/kg range. Thunderstorm
    development will take place ahead of the front in the afternoon as
    low-level convergence gradually becomes focused. A line of strong to
    severe storms is expected to develop and move eastward across the
    Ohio Valley in the late afternoon and early evening. Additional
    strong to severe storms will be possible in the central Appalachians
    during the late afternoon.

    A gradual increase in deep-layer shear is expected across the Ohio
    Valley during the afternoon, as the upper-level trough approaches
    from the west. In central Ohio, forecast soundings increase 0-6 km
    shear from 25 knots at midday into the 35 to 40 knot range by late
    afternoon. In addition, 0-3 km lapse rates are forecast to increase
    to around 7.5 C/km. This environment should be favorable for
    organized multicell line segments with severe wind gusts. The
    greatest wind-damage threat is forecast from Ohio southwestward into
    far northern Kentucky during the late afternoon and early evening,
    as the right rear quadrant of the mid-level jet passes through. This
    will help strengthen large-scale ascent. Further east into the
    central Appalachians, large-scale ascent will be weaker, but a
    conditional threat for severe storms will exist as low-level lapse
    rates become steep in the late afternoon. A marginal severe threat
    may also develop southwestward into the mid Mississippi Valley,
    where instability and shear will be sufficient for isolated severe gusts.

    ...Southern Plains/Lower Mississippi Valley...

    The southern extent of an upper-level trough will move eastward
    across southern and central Plains on Saturday. At the surface, a
    cold front will advance southeastward through the Ark-La-Tex and
    Texas Coastal Plains. As surface temperatures warm during the day
    and low-level convergence increases near the front, scattered to
    numerous thunderstorms will develop. A large complex of storms will
    move east-southeastward toward the western Gulf Coast during the
    late afternoon and early evening. Over much of the moist sector,
    SBCAPE is forecast in the 1000 to 1500 j/kg range with 0-6 km shear
    of 25 to 30 knots. This should be enough for isolated severe wind
    gusts. Hail could also occur.

    ..Broyles.. 04/03/2026

    $$
    --- MultiMail/DOS
    * Origin: Project Scorpio TEST (618:250/6)
  • From Mike Powell@618:250/6 to All on Fri Apr 3 10:18:20 2026
    ACUS02 KWNS 030550
    SWODY2
    SPC AC 030549

    Day 2 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1249 AM CDT Fri Apr 03 2026

    Valid 041200Z - 051200Z

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    THE OHIO VALLEY...

    ...SUMMARY...
    Thunderstorms with severe wind gusts and hail will be possible
    Saturday afternoon and evening in parts of the Ohio Valley.
    Thunderstorms with isolated severe gusts and hail will also be
    possible from the southern Plains into the lower Mississippi Valley.

    ...Ohio Valley/Lower Great Lakes...

    An upper-level trough will move eastward across the north-central
    U.S. on Saturday, as an associated 60 to 75 knot mid-level jet
    translates eastward through the Great Lakes. At the surface, a cold
    front will advance eastward through the Ohio Valley. Ahead of the
    front, surface dewpoints will be in the lower to mid 60s F.
    Instability will increase along the moist axis during the day, with
    SBCAPE likely peaking in the 500 to 1000 J/kg range. Thunderstorm
    development will take place ahead of the front in the afternoon as
    low-level convergence gradually becomes focused. A line of strong to
    severe storms is expected to develop and move eastward across the
    Ohio Valley in the late afternoon and early evening. Additional
    strong to severe storms will be possible in the central Appalachians
    during the late afternoon.

    A gradual increase in deep-layer shear is expected across the Ohio
    Valley during the afternoon, as the upper-level trough approaches
    from the west. In central Ohio, forecast soundings increase 0-6 km
    shear from 25 knots at midday into the 35 to 40 knot range by late
    afternoon. In addition, 0-3 km lapse rates are forecast to increase
    to around 7.5 C/km. This environment should be favorable for
    organized multicell line segments with severe wind gusts. The
    greatest wind-damage threat is forecast from Ohio southwestward into
    far northern Kentucky during the late afternoon and early evening,
    as the right rear quadrant of the mid-level jet passes through. This
    will help strengthen large-scale ascent. Further east into the
    central Appalachians, large-scale ascent will be weaker, but a
    conditional threat for severe storms will exist as low-level lapse
    rates become steep in the late afternoon. A marginal severe threat
    may also develop southwestward into the mid Mississippi Valley,
    where instability and shear will be sufficient for isolated severe gusts.

    ...Southern Plains/Lower Mississippi Valley...

    The southern extent of an upper-level trough will move eastward
    across southern and central Plains on Saturday. At the surface, a
    cold front will advance southeastward through the Ark-La-Tex and
    Texas Coastal Plains. As surface temperatures warm during the day
    and low-level convergence increases near the front, scattered to
    numerous thunderstorms will develop. A large complex of storms will
    move east-southeastward toward the western Gulf Coast during the
    late afternoon and early evening. Over much of the moist sector,
    SBCAPE is forecast in the 1000 to 1500 j/kg range with 0-6 km shear
    of 25 to 30 knots. This should be enough for isolated severe wind
    gusts. Hail could also occur.

    ..Broyles.. 04/03/2026

    $$
    --- MultiMail/DOS
    * Origin: Project Scorpio TEST (618:250/6)
  • From Mike Powell@618:250/10 to All on Mon Jul 27 08:56:16 2026
    ACUS02 KWNS 270521
    SWODY2
    SPC AC 270520

    Day 2 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1220 AM CDT Mon Jul 27 2026

    Valid 281200Z - 291200Z

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE SOUTHERN MID-ATLANTIC INTO THE CAROLINAS AND CENTRAL AND SOUTHERN APPALACHIANS...

    ...SUMMARY...
    Severe thunderstorms capable of damaging winds and isolated hail are
    possible from the southern Mid-Atlantic into the Carolinas and
    central and southern Appalachians Tuesday into Tuesday evening.
    Isolated severe wind gusts and large hail may occur in the central
    High Plains.

    ...Synopsis...

    Considerable trough amplification is forecast over the eastern CONUS
    this period, aided by the propagation of the mid/upper-level jet
    streaks from the Great Lakes and OH Valley through VA and NC. A
    series of vorticity maxima is forecast on the cyclonic side of the
    jet streaks, which will enhance forcing for ascent over the central Appalachians into the Mid-Atlantic. At the surface, the primary low
    pressure is expected to deepen over the Delmarva with a secondary
    cyclone over western NY. A lee trough will extend from the Delmarva
    low south-southwest along the Piedmont, ahead of a cold front moving
    through the TN Valley and central and southern Appalachians.

    ...Mid-Atlantic into the Southern Appalachians...

    Showers and thunderstorms (some potentially severe with damaging
    winds) are expected to be ongoing Tuesday morning from the lower
    Great Lakes into the central Appalachians. The longevity and areal
    extent of the early-day storms will be a determinant in where more
    robust air mass destabilization will take place during the
    afternoon. The 00Z HREF calibrated thunder probabilities suggest the
    most likely areas for persistent morning storms will be from NY and
    PA into the Delmarva and WV. To the south of those locations,
    stronger daytime heating appears more probable, which, combined with boundary-layer dewpoints in the upper 60s to mid 70s, will yield
    moderate to potentially strong afternoon instability with MLCAPE of
    1500-2500+ J/kg.

    Thunderstorms are expected to increase in coverage and intensity
    during the afternoon along and ahead of the cold front and lee
    trough as background forcing for ascent strengthens in the left exit
    region of the approaching upper-level jet streak. The presence of
    the mid/upper-level wind maxima will yield long hodographs with
    sufficient vertical shear for supercells and bowing structures. The strengthening shear combined with cooling mid-level temperatures
    will be supportive of large-hail production with any supercells that
    form. Otherwise, damaging winds will be the primary hazard,
    especially with any storm clusters or bowing line segments. Some
    tornado threat could also materialize Tuesday afternoon into evening
    near and south of the Delmarva surface low where slightly stronger
    low-level shear is forecast.

    ...Central High Plains...

    Strong heating of a moist, upslope-flow air mass is expected to
    yield a moderately unstable environment by afternoon with MLCAPE of
    1500-2500 J/kg. Isolated to widely scattered thunderstorm
    development appears possible by mid- to late afternoon along the
    high terrain within a kinematic environment featuring 30-35 kt
    westerly deep-layer shear. Transient supercell structures appear
    possible, which suggest some marginally severe hail potential,
    despite the warm mid-level temperatures. There is some model signal
    for storm clustering over the adjacent High Plains by evening, at
    which point the threat for isolated severe wind gusts would increase.

    ..Mead.. 07/27/2026

    $$
    --- MultiMail/DOS
    * Origin: capitolcityonline.net * KY, USA (618:250/10)
  • From Mike Powell@618:250/10 to All on Tue Jul 28 09:10:54 2026
    ACUS02 KWNS 280541
    SWODY2
    SPC AC 280539

    Day 2 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1239 AM CDT Tue Jul 28 2026

    Valid 291200Z - 301200Z

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER SOUTHERN
    GEORGIA AND NORTHERN FLORIDA...

    ...SUMMARY...
    Widely scattered severe storms capable of mainly damaging winds
    appear possible Wednesday afternoon and early evening over southern
    Georgia and northern Florida. Isolated severe storms capable of
    severe wind gusts and large hail may occur over the northern High
    Plains Wednesday afternoon through evening.

    ...Synopsis...

    An upper low will remain quasi-stationary over the Mid-Atlantic with
    associated troughing extending south along the Atlantic Coast. Some
    mid-level flow enhancement is forecast across the Carolinas into GA
    Wednesday afternoon in conjunction with a weak disturbance moving
    through the base of the trough. Elsewhere, an upper high will remain
    anchored over the southern Rockies with a series of perturbations
    rotating through the western into northern periphery of that feature.

    At the surface, a cool front will settle south into the southeast
    Atlantic coastal areas and central and eastern Gulf states by
    afternoon with the boundary extending northwest into the central
    Plains. Farther west, a lee cyclone is forecast to deepen over the
    northern High Plains with an associated lee trough extending into
    the central High Plains.

    ...Southeast...

    Temperatures in the mid to upper 90s coupled with dewpoints in the
    70s are expected to yield a strongly unstable, prefrontal air mass
    by afternoon with MLCAPE up to 3000-4000 J/kg. The glancing
    influence of the mid-level wave passing to the immediate north will
    combine with modest frontal convergence to foster scattered
    thunderstorms by afternoon from central and southern AL into
    southern GA and northern FL. While the strongest deep-layer shear is
    expected to remain across the post-frontal air mass, a modest
    increase in mid-level flow will overspread the frontal zone. That,
    along with the strong buoyancy, high precipitable water content, and
    steepening low-level lapse rates will be supportive of damaging wet microbursts, especially if some cold pool organization can occur.

    ...Northern High Plains...

    Steep low/mid-level lapse rates and resultant moderate instability
    (e.g., MLCAPE of 1500-2500 J/kg) are forecast by afternoon to the
    east of the surface low and lee trough. Strong daytime heating and
    the approach of a weak mid-level disturbance from the west are
    expected to erode the cap, allowing for widely scattered storm
    development from late afternoon into evening. Model soundings
    indicate a vertically veering wind profile with 30-35 kt of
    effective bulk shear, which suggests the potential for high-based,
    transient supercell structures with an associated risk for localized
    severe wind gusts and marginally severe hail. There is some model
    signal for a potentially greater severe wind gust threat developing
    over western into central ND Wednesday evening. Should that signal
    persist, an upgrade to Level 2/Slight Risk may be required.

    ...Southern New England...

    A zone of enhanced low-level shear is forecast to develop to the
    immediate east of the deep-layer cyclone over the Mid-Atlantic on
    Wednesday. Clouds and precipitation are expected to limit air mass destabilization within the zone of stronger shear, which should
    preclude a severe weather threat. However, if later model runs
    indicate stronger instability than is currently forecast, low severe
    weather probabilities may be required.

    ..Mead.. 07/28/2026

    $$
    --- MultiMail/DOS
    * Origin: capitolcityonline.net * KY, USA (618:250/10)