• DAY1 3/5 RISK AREA POSTED

    From Mike Powell@618:250/10 to All on Sun Jun 7 09:10:22 2026
    ACUS01 KWNS 071206
    SWODY1
    SPC AC 071204

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0704 AM CDT Sun Jun 07 2026

    Valid 071300Z - 081200Z

    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    SOUTHEAST MONTANA...NORTHEAST WYOMING...AND THE WESTERN DAKOTAS THIS
    AFTERNOON AND EVENING....

    ...SUMMARY...
    Severe thunderstorms with damaging wind gusts, large hail, and an
    isolated tornado threat are expected this afternoon and evening
    across parts of the northern Plains. An isolated threat for
    tornadoes and severe wind gusts will be possible across the Ozarks
    region. Strong wind gusts will also be possible in the mid
    Mississippi Valley and in the Mid-Atlantic.

    ...MT/WY/Dakotas...

    A strong upper trough currently over the northern Great Basin will
    translate eastward today, with large scale forcing for ascent
    overspreading much of the northern High Plains region. This will
    aid cyclogenesis over eastern WY and focus a surface cold front from south-central WY into northwest ND. Thunderstorms are expected to
    form by mid-afternoon off the BigHorn mountains and build eastward
    across southeast MT. While this environment will be post-frontal,
    Relatively steep low-level lapse rates and moderate CAPE values will
    support a risk of large hail and damaging winds.
    Most CAM solutions suggest thunderstorms will become more numerous
    and intense as they spread into western SD this evening, maintaining
    support of the ENH risk area.

    ...Ozarks...

    A weak cut-off low continues to drift northeastward across OK this
    morning. An associated band of 30-40 knot southwesterly mid-level
    winds and deep moisture will lie across the Ozark plateau today,
    where scattered thunderstorms are expected through the period.
    Parameters are rather weak across this region, but there will be
    some risk of locally damaging wind gusts or a tornado this
    afternoon/evening if pockets of daytime heating can occur.

    ...Eastern VA/NC...

    A weak surface cold front is sagging southward across central VA
    this morning. A combination of strong heating and frontal forcing
    will lead to widely scattered thunderstorms this afternoon across
    southeast VA and northeast NC. The strongest of these cells could
    produce gusty winds.

    ..Hart/Wendt.. 06/07/2026

    $$
    --- SBBSecho 3.28-Linux
    * Origin: Capitol City Online (618:250/10)
  • From Mike Powell@618:250/10 to All on Tue Jun 9 08:11:24 2026
    ACUS01 KWNS 091300
    SWODY1
    SPC AC 091259

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0759 AM CDT Tue Jun 09 2026

    Valid 091300Z - 101200Z

    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS THE
    NORTHERN AND CENTRAL PLAINS...

    ...SUMMARY...
    Numerous severe thunderstorms with a potential for 60-80 mph winds
    with locally higher gusts, along with tornadoes (some potentially
    strong), and large to very large hail are expected across the
    northern and central Plains this afternoon and tonight. Severe wind
    gusts and large hail will also be possible from north-central and
    west-central Kansas southwestward into the Texas Panhandle.

    ...Central and Northern Plains...

    A prominent upper trough will shift east-northeastward from the
    northern Rockies toward the northern High Plains and Canadian
    Prairies through tonight, with height falls overspreading much of
    the northern/central Plains toward the Upper Midwest. This will be
    atop a moist airmass near/east of a dryline/front located from far
    western North Dakota southward into western Nebraska. Warm sector
    surface dewpoints will be in the upper 60s and lower 70s F.

    Thunderstorms are expected to form near the front/dryline by
    mid/late afternoon, initially spanning the west-central Dakotas
    southward into western Nebraska. Some semi-discrete storms including
    supercells may also form farther east within the warm sector,
    enhanced as the mid-level jet phases with a significantly
    strengthening low-level jet primarily focused across eastern North Dakota/northeast South Dakota. Aside from large hail, a few
    tornadoes are expected, some of which could be strong especially
    during the early/mid-afternoon hours. Over time and farther west,
    strong low-level convergence near the instability axis will result
    in a relatively rapid transition to linear mode with multiple linear clusters/possible MCS expected to develop by evening. The severe MCS
    will move eastward across the central and eastern Dakotas, with
    damaging wind and some hail/tornado potential continuing eastward
    tonight toward Minnesota/part of Iowa.

    Aside from North Dakota/northern South Dakota and northwest
    Minnesota, another supercell/tornado-favorable zone could
    materialize by evening farther southeast from southeast South Dakota
    into eastern Nebraska and western Iowa/southwest Minnesota.
    Mid-level temperatures will be a bit warmer and storm
    coverage/certainty will likely be lesser across this region.
    However, a rather favorable and potentially volatile environment
    will exist as a secondary low-level jet branch increases and
    interfaces with an effective warm frontal zone this evening, with
    initial intense supercells plausible if/where storms develop.

    ...Western and central Kansas and Texas and Oklahoma Panhandles...

    Higher-based storms are expected to develop regionally by late
    afternoon/early evening with moderate buoyancy and very steep lapse
    rates favorable for large hail and severe-caliber wind gusts, some
    of which could be significant.

    ...Middle Mississippi Valley/Lower Ohio Valley...

    As a byproduct of several decayed MCS, multiple MCVs will are
    expected to drift east-southeastward across the region today and
    interface with a moist/unstable environment influenced by outflow
    and differential heating. A rejuvenated round of severe storms is
    expected by mid/late afternoon, and some supercells are plausible if MCV-related mid-level flow diurnally persists. Multicells capable of
    damaging winds are the most probable hazard, but some
    supercell-related tornado potential may also exist.

    ..Guyer/Wendt.. 06/09/2026

    $$
    --- SBBSecho 3.28-Linux
    * Origin: Capitol City Online (618:250/10)
  • From Mike Powell@618:250/10 to All on Sat Jun 13 08:24:41 2026
    ACUS01 KWNS 131255
    SWODY1
    SPC AC 131253

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0753 AM CDT Sat Jun 13 2026

    Valid 131300Z - 141200Z

    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
    OF THE CENTRAL PLAINS AND LOWER MISSOURI VALLEY...

    ...SUMMARY...
    Scattered severe thunderstorms are likely today and tonight across
    parts of the central and southern Plains to Missouri Valley and
    Middle Mississippi Valley. Swaths of damaging wind gusts, large
    hail, and a few tornadoes are all possible.

    ...Central/Southern Plains to Middle Mississippi Valley...

    An active severe-weather day is anticipated with multiple rounds of
    severe storms expected regionally today into tonight. Near the nose
    of a southwesterly low-level jet, an initial early day severe risk
    will focus across southeast Nebraska, where elevated/increasingly
    organized storms are ongoing just after dawn, into southern Iowa and
    northern Missouri. Large hail will remain possible, but the
    potential for damaging winds may increase relatively early today as
    storms spread east-southeastward.

    Meanwhile, a more complex scenario exists farther south,
    attributable to persistent predawn storms across the Ozarks, as well
    as a decayed convective cluster and one or more residual MCVs across
    Oklahoma and far southeast Kansas. These MCVs, as they focus deeper
    convection along modifying outflow/differential heating zones,
    should inspire renewed deeper convective development this afternoon
    across parts of the Ozarks toward the Mid-South/middle Mississippi
    Valley. This includes the potential for some supercells and
    organizing clusters, with damaging winds and some hail as the
    primary hazards through evening.

    Farther west and later in the day, strong diurnal heating/steepening
    low-level lapse rates preceding the surface low will result in
    scattered thunderstorm development near/ahead of the
    southeast-moving cold front, with the most intense development
    likely favoring where the front intercepts the west-southwest
    periphery of early day storms and any residual cloud cover/modifying
    outflow. This will likely include central/eastern Kansas and
    possibly far southeast Nebraska into western/northern Missouri.

    Steep mid-level lapse rates atop rich boundary-layer moisture will
    yield a strongly unstable air mass, which combined with around 40 kt
    of effective shear, will support initial intense semi-discrete
    supercells as then organizing clusters. All hazards seem likely
    including large hail, with damaging winds potentially evolving as
    the most prominent risk this evening, potentially including some
    significant (75+ mph) wind gusts. The potential for tornadoes will
    also exist, particularly late afternoon into evening as the
    low-level jet increases, with modifying outflow potentially another
    factor across west/southwest Missouri and possibly far eastern
    Kansas and vicinity.

    ...Carolinas/Coastal Southeast...

    Ample heating within a moist environment south of a front will lead
    to moderately strong diurnal destabilization, with convective
    development aided by the front and coastal sea breeze. Some
    pulse-type locally severe storms capable of downbursts/wind damage
    may occur this afternoon through around sunset.

    ..Guyer/Broyles.. 06/13/2026

    $$
    --- SBBSecho 3.28-Linux
    * Origin: Capitol City Online (618:250/10)
  • From Mike Powell@618:250/10 to All on Tue Jun 23 08:32:26 2026
    ACUS01 KWNS 231252
    SWODY1
    SPC AC 231250

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0750 AM CDT Tue Jun 23 2026

    Valid 231300Z - 241200Z

    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    THE CENTRAL HIGH PLAINS...

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    SOUTHEAST VIRGINIA AND EASTERN NORTH CAROLINA...

    ...SUMMARY...
    Severe thunderstorms capable of producing 2+ inch diameter hail, 75+
    mph gusts, and isolated tornadoes are expected from the central High
    Plains into parts of the southern Plains today into tonight.
    Scattered damaging winds should also occur with thunderstorms across
    southeast Virginia and eastern North Carolina.

    ...Southern Plains...

    Mainly elevated thunderstorms are occurring across western/southwest
    KS into northwest OK this morning, aided by a 20-25 kt southerly
    low-level jet and attendant warm/moist advection. This convection
    may tend to remain elevated for at least the next couple of hours,
    as a surface front remains draped near the Red River vicinity.
    However, there is substantial low-level moisture present across the
    TX Panhandle into western OK along/south of the ongoing
    thunderstorms (upper 60s to low 70s surface dewpoints). Steep
    mid-level lapse rates atop this moist airmass is supporting MUCAPE
    up to 3000-4000 J/kg. Strongly veering and modestly strengthening
    winds with height through mid/upper levels is fostering upwards of
    40-50 kt of effective bulk shear per recent RAP forecast soundings
    and latest mesoanalysis estimates. This activity will likely
    continue to pose a threat for mainly large hail this morning so long
    as the mode remains supercellular.

    With time, mergers/outflow interactions should foster some
    clustering/upscale growth into the afternoon. There is some
    potential for a more concentrated corridor of severe/damaging winds
    to spread southward this afternoon and evening across parts of the
    TX Panhandle into western/central OK with one or more intense
    clusters that form. Isolated significant gusts to 75-85 mph gusts
    appear possible given an already very moist/unstable airmass that
    will undergo additional destabilization with daytime heating.
    Strongly considered increasing wind probabilities and introducing an
    Enhanced Risk for this area. But, ongoing morning convection casts a
    little too much uncertainty to upgrade with this outlook update.

    ...Central High Plains...

    Thunderstorms ongoing across western NE this morning on the northern
    periphery of the low-level jet and related moisture plume have
    recently weakened. Still, this convection may continue to pose an
    isolated severe hail/wind risk for as long as it can persist. But,
    additional weakening is expected later this morning as it encounters
    a less unstable airmass. Otherwise, westerly mid-level flow and weak
    forcing will persist over the central High Plains today. Weak
    low-level upslope flow and a small-scale mid-level perturbation
    embedded within the westerly flow aloft should encourage at least
    isolated convective development across southeast WY into eastern CO
    by early/mid evening.

    Model trends suggest that robust convective initiation may be
    delayed until 00Z or perhaps even later (04-06Z). Still, a
    conditionally favorable environment for very large hail will exist
    across the central High Plains this afternoon into tonight. Any
    thunderstorms that can develop will likely become severe given
    strong deep-layer shear, the presence of steep mid-level lapse
    rates, and moderate to locally strong instability. Have maintained
    the Enhanced Risk for large to very large hail, but lower confidence
    exists for a swath of severe/damaging winds given the probable late
    timing of convection and tendency for this activity to remain
    discrete. Even though low-level flow and shear will remain modest
    this evening across the central High Plains, a tornado may still
    occur with any sustained supercell.

    ...Southeast Virginia/Eastern North Carolina...

    Within large-scale upper troughing over the eastern CONUS/Canada, an
    embedded mid-level shortwave trough will move eastward today across
    the Carolinas and southern Mid-Atlantic. At the surface, a cold
    front will also develop eastward across these areas through the
    afternoon. Current expectations are for thunderstorms to develop by
    late morning/early afternoon along and ahead of the front. While
    lapse rates aloft will remain poor, sufficient instability will
    exist with daytime heating to support surface-based convection. A
    generally linear/cluster mode is anticipated given the frontal
    forcing, with modestly enhanced low/mid-level flow and related shear
    supporting thunderstorm organization. Scattered damaging winds
    appear to be the main threat with this activity as it spreads
    eastward through the afternoon, with the greatest concentration
    forecast across parts of southeast VA and eastern NC. A brief
    tornado or two may also occur with embedded mesocirculations in the line.

    ...Northern Plains/Upper Midwest...

    A closed mid-level low over south-central Canada this morning will
    move slowly eastward today. A belt of enhanced (40-50 kt) westerly
    mid-level winds will overspread parts of the northern Plains and
    Upper Midwest to the south of this low. At the surface, a cold front
    in the process of occluding is located over the Dakotas.
    Thunderstorms should develop this afternoon along/east of this
    boundary across parts of the eastern Dakotas into western MN. Given
    sufficient deep-layer shear and instability, some of this activity
    may pose an isolated severe hail/wind risk, along with a tornado or
    two. Modest instability should keep the overall severe risk fairly isolated/marginal.

    ..Gleason/Jewell.. 06/23/2026

    $$
    --- SBBSecho 3.28-Linux
    * Origin: Capitol City Online (618:250/10)
  • From Mike Powell@618:250/10 to All on Wed Jun 24 08:47:13 2026
    ACUS01 KWNS 241257
    SWODY1
    SPC AC 241255

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0755 AM CDT Wed Jun 24 2026

    Valid 241300Z - 251200Z

    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    THE CENTRAL HIGH PLAINS...

    ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
    UTAH AND PORTIONS OF WISCONSIN INTO NORTHERN ILLINOIS...

    ...SUMMARY...
    Widely scattered but intense severe thunderstorms should occur this
    afternoon and evening across parts of the central High Plains, with
    a threat for large to very large hail, severe wind gusts, and
    perhaps a couple of tornadoes all possible.

    ...Central/Southern High Plains...

    Post-frontal low-level moisture will remain over the central High
    Plains today. As daytime heating occurs and low-level clouds present
    this morning gradually erode, 2000-3000 J/kg of MLCAPE should
    develop by mid to late afternoon in a narrow corridor across
    northeast CO into southeast WY. This instability will also be aided
    by the presence of steep mid-level lapse rates. Thunderstorms should
    eventually develop this afternoon across much the region as strong
    mid-level west-northwesterly flow associated with a shortwave trough
    over the northern Plains overspreads the central Rockies/High
    Plains. The highest convective coverage is anticipated from south-central/southeast WY into northeast/east-central CO, where
    buoyancy should be maximized. Deep-layer shear will be rather
    strong, with values up to 50-60 kt. These conditions will support
    the potential for intense supercells capable of large to very large
    hail (isolated 2-4 inches in diameter possible). Notable low-level
    curvature of the hodograph could support a tornado or two in this
    region as well. Eventual upscale growth into a southeastward-moving
    MCS capable of producing severe winds is probable into eastern
    CO/western KS this evening, with some 75+ mph gusts possible.

    Lower thunderstorm coverage is anticipated farther south into the
    southern High Plains, with warmer temperatures and higher cloud
    bases suggesting a predominantly outflow-dominant mode. Strong to
    severe gusts will be the primary risk, although isolated hail may
    also occur.

    ...Upper Midwest...

    A belt of 40-50 kt westerly mid-level flow will overspread WI and
    vicinity today as a weak shortwave trough moves across the Upper
    Midwest and Great Lakes through the period. Extensive cloudiness is
    prevalent across WI this morning, which will delay daytime heating
    to some extent. But, seasonably cool temperatures aloft will aid up
    to around 1000-1500 J/kg of MLCAPE through peak afternoon heating
    along/ahead of a weak cold front. Current expectations are for
    scattered to numerous thunderstorms to develop this afternoon with
    moderate to locally strong deep-layer shear providing support for
    updraft organization. A mix of multicells and supercells should pose
    a threat for severe hail and damaging winds as they spread
    east-southeastward through the afternoon and evening before
    eventually weakening. Enough confidence exists in this scenario
    occurring to include greater severe hail probabilities and a
    corresponding Slight Risk.

    ...Great Basin/Four Corners...

    Current surface observations indicate rather dry conditions across
    the Great Basin/Four Corners regions this morning. Still, greater
    low/mid-level moisture is forecast to advect northeastward through
    the day as a weak mid-level shortwave trough advances
    east-northeastward from the lower CO River Valley across the Great
    Basin. The boundary layer is expected to become very well mixed with
    strong daytime heating that will occur this afternoon, with weak
    instability present. Modestly enhanced mid-level flow will aid in
    northeastward thunderstorm motions, and some potential exists for
    strong/gusty outflow winds across a large area this afternoon and
    early evening. Have maintained the Slight Risk for severe winds
    across parts of UT with no changes, as this area still appears to
    have the best overlap of low-level moisture/instability and
    scattered to numerous thunderstorm coverage.

    ...Southern Plains into the Lower Mississippi Valley...

    Mainly elevated thunderstorms are ongoing this morning across
    northern OK/southern KS, likely aided by weak low-level warm
    advection. Recent radar imagery suggests this activity may be
    acquiring an MCV circulation. This feature should track
    southeastward towards the ArkLaTex through the day, generally along
    and north of a surface front stalled near the Red River. Eventual re-strengthening of convection may occur, even though deep-layer
    flow and related shear should remain rather modest. Isolated hail
    and damaging winds may occur with the strongest cores that form, but
    the potential for a more organized bowing complex is uncertain.
    Farther south into the lower MS Valley, additional thunderstorms may
    form this afternoon ahead of the ongoing convection in northern LA
    in a moderately to strongly unstable airmass. While flow through the troposphere is expected to remain fairly modest with southward
    extent across this region, some loosely organized clusters could
    pose an isolated threat for damaging winds as they spread towards
    the central Gulf Coast through the early evening.

    ...Florida...

    Morning visible satellite imagery shows mostly clear skies across
    the FL Peninsula. A moist low-level airmass with surface dewpoints
    in the low to mid 70s is in place along/south of a front draped
    across north FL. While low/mid-level winds will remain weak today,
    cool mid-level temperatures and ample daytime heating will support
    the development of moderate to locally strong instability this
    afternoon. Scattered to numerous pulse-type thunderstorms are
    expected to develop across the interior FL Peninsula and Atlantic
    Coast sea breeze, with occasional damaging winds possible given
    steepened low-level lapse rates.

    ..Gleason/Jewell.. 06/24/2026

    $$
    --- SBBSecho 3.28-Linux
    * Origin: Capitol City Online (618:250/10)