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Severe Weather Center

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Today's Severe Weather Outlook


Todays Highest Threat Level is ENHANCED

Current Severe Weather Discussion Issued by the Storm Prediction Center

   SPC AC 201609

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1109 AM CDT Sat Jun 20 2026

   Valid 201630Z - 211200Z

   ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
   THE CENTRAL PLAINS THIS AFTERNOON AND TONIGHT....

   ...SUMMARY...
   Severe thunderstorms are likely across parts of the central Plains
   mainly this afternoon and evening. Large to very large hail, severe
   winds (some 75+ mph), and a few tornadoes are possible.

   ...Central Plains...
   Water vapor imagery shows a shortwave trough over ID/UT tracking
   eastward toward the central High Plains.  Southerly/southeasterly
   low-level winds ahead of this feature over parts of eastern
   CO/western NE/KS will help to maintain a moist and moderately
   unstable air mass across the region, especially as low clouds
   continue to burn off and afternoon heating commences.  Scattered
   thunderstorm development is expected by mid-afternoon over central
   WY down into central CO in favored terrain/convergence areas.  This
   activity will spread eastward into a progressively more
   moist/unstable air mass and intensify into supercells.  A corridor
   of favorable vertical shear will develop later today from northeast
   CO into southwest NE/northwest KS for isolated tornadoes. 
   Otherwise, very large hail and damaging winds will be the main
   concerns.  Activity is likely to organize upscale during the evening
   and spread across KS with a damaging wind risk persisting much of
   the night.

   ...Southeast...
   A very moist and moderately unstable air mass is present again today
   over much of the southeast US.  Most CAM solutions suggest scattered
   afternoon thunderstorms across this area, including along the FL
   east coast.  Dewpoints in the 70s and PWAT values around 2 inches,
   coupled with strong daytime heating and steep low-level lapse rates
   suggest a risk of locally gusty/damaging wind gusts in the most
   intense cores.

   ..Hart/Moore.. 06/20/2026

   CLICK TO GET <a href="archive/2026/KWNSPTSDY1_202606201630.txt">WUUS01 PTSDY1</a> PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z
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View the SPC's Day 1 Outlook

Go to our Safety Center for information about Severe Weather Safety

Today's Convective Outlook
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Today's Tornado Outlook
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Today's Wind Outlook
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Today's Hail Outlook
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Todays Flash Flooding Outlook


Todays Highest Flash Flood Threat Level is MODERATE

Current Excessive Rainfall Discussion Issued by the Weather Prediction Center

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
1250 PM EDT Sat Jun 20 2026
Day 1
Valid 16Z Sat Jun 20 2026 - 12Z Sun Jun 21 2026

...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL IN EFFECT FOR
PARTS OF THE CENTRAL PLAINS AND LOWER MISSOURI VALLEY...

...Central Plains and Missouri Valley...

A large area of heavy rain associated with a developing MCS
starting this evening and continuing into early Sunday is expected
to bring widespread heavy rainfall and flash flooding across
portions of the central Plains into the Missouri Valley. The
greatest threat for numerous instances of flash flooding currently
is expected across southeastern Nebraska, northeastern Kansas, and
far northwestern Missouri/southwestern Iowa. Storms are expected
to initiate Saturday afternoon with peak heating over the central
High Plains and ahead of a racing shortwave crossing the Rockies.
Meanwhile, a LLJ of southeasterly flow will increase WAA and pump
deep Gulf moisture up the Plains through the day. This will force
the dryline to race eastward in response. The warm front associated
with the low and the dry line will uplift the deep moisture,
resulting in widespread shower and thunderstorm development across
Nebraska as early as this afternoon. These storms are expected to
grow upscale into an expansive, organized convective system into
the evening and overnight hours that will then track southeasterly
across the risk area.

The latest deterministic guidance shows areal average rainfall
totals along the expected path of the MCS in the 2-4" range with
locally higher amounts of 4-6", more than sufficient to lead to
potentially widespread flash flooding, which has prompted the
level 3/4 Moderate Risk. As is usually the case with convective
systems the exact path and duration will be determined by more
mesoscale details than the guidance can typically pin down. Some
CAMs (like the NAM3k) favor the northern axis of heavy rain across
southeast Nebraska closer to the developing surface low/MCV,
whereas the 00z RRFS favors a southern solution and heaviest
rainfall across central Kansas. Regardless, PWs surging to 2" by
tonight and increased forcing will support rainfall rates within
thunderstorms to be intense and around 2-3"/hr. These rates could
be exacerbated by cell mergers and brief training to quickly lead
to flash flooding concerns. The 00Z REFS and HREF both highlight
neighborhood probabilities of 3" per 6-hrs (above local FFG) around
40-50%+ within the MDT through 12Z Sun and then extending into the
Day 2 period. Should these heavier rates intersect with urban
area, significant impacts from flash flooding cannot be ruled out.

...Eastern Texas through the Southeast...

1600Z Update...

Per collaboration with the affected WFOs, have expanded the Slight
Risk down the Middle and Lower TX Coast (and adjacent inland
counties), based on the current observational/mesoanalysis trends
along with the recent (12Z) high-res CAM trends and HREF
probabilistic suite. Airmass remains primed for highly efficient
rainfall rates, with PWs over 2.25" and mixed-layer CAPEs quite
robust between 2000-3000 J/Kg. All ahead of a slow-moving upper
level vort lobe along/inland of the Gulf Coast (MCV over S. TX),
where Gulf breezes will enhance the low-level moisture convergence
farther inland.

Hurley

Previous discussion...

One more day of scattered slow-moving storms is expected today
across the Deep South between eastern TX and southeast GA/northeast
FL. The lingering frontal boundary draped north of the Gulf Coast
will begin to lift north during the day and leave convection widely
scattered, but with one area of more focused activity between
central MS and coastal southeast GA/northeast FL. This is likely
during the morning and midday hours and supported by most CAMs as
high pressure over the Tennessee Valley keeps the thermal/moisture
gradient rather sharp and focuses ongoing thunderstorm activity
within PWs above 2". Both the 00Z REFS and 00Z HREF highlight
elevated chances (40-50%) for at least 3" in 6-hrs near Birmingham,
AL. This could be an area within the SLGT risk that sees more
severe flash flood impacts should a higher-end scenario develop.

Lingering MCV(s) across eastern TX and the Lower Mississippi Valley
could also add a focus for more organized thunderstorm activity,
while also adding to the short term uncertainty. The soils in this
region remain extremely saturated and sensitive to additional
intense rainfall rates, leading to the potential for scattered
instances of flash flooding and the SLGT risk of excessive
rainfall, even for locations that can typically take 2-3" of rain.

Snell


Day 1 threat area: <a href="https://www.wpc.ncep.noaa.gov/qpf/94epoints.txt"<u>www.wpc.ncep.noaa.gov/qpf/94epoints.txt</u></a>



View the WPC's Day 1 Excessive Rainfall Outlook

Go to our Safety Center for information about Severe Weather Safety

Today's Excessive Rainfall Outlook
...
Tomorrow's Excessive Rainfall Outlook
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Tomorrows Severe Weather Outlook


Tomorrows Highest Threat Level is HIGH

Tomorrow's Severe Weather Discussion Issued by the Storm Prediction Center

   SPC AC 201723

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1223 PM CDT Sat Jun 20 2026

   Valid 211200Z - 221200Z

   ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE CENTRAL
   HIGH PLAINS INTO THE OHIO VALLEY...

   ...SUMMARY...
   Severe storms are possible along a frontal zone from the Ohio Valley
   to the central High Plains from Sunday afternoon into night. Large
   to very large hail, severe winds, and tornadoes (some of which could
   be strong) will be possible.

   ...Synopsis...

   A series of vorticity maxima, some with convective origins, will
   translate east through the central Plains and OH Valley, along with
   a belt of 40-50+ kt winds at 500 mb. In the lower levels, a
   southwesterly low-level jet (LLJ) initially from the southern Plains
   into the mid MO Valley Sunday morning is forecast to migrate east
   into the mid MS and OH Valleys, immediately ahead of a surface low
   tracking through the lower MO Valley into IL/IN. A cold front will
   trail the surface low, likely extending southwest through the lower
   MO Valley into southern KS or northern OK and the TX Panhandle by
   mid to late afternoon.


   ...Missouri into the OH Valley...

   Latest models remain consistent with previous runs in depicting one
   or multiple MCSs ongoing at 12Z Sunday along the LLJ axis from
   eastern KS into parts of northern and central MO. While the models
   signal a general decrease in storm coverage through the morning, the
   presence of modestly strong vertical shear suggests the potential
   for isolated occurrences of damaging winds and perhaps some hail
   across MO into western IL. 

   Renewed storm development is anticipated by afternoon from IL/IN in
   the vicinity of a remnant MCV west/southwest along the trailing
   outflow/warm frontal boundary to the primary surface low over the
   lower MO Valley. Enhanced warm thermal and moisture fluxes occurring
   along the LLJ are expected to support air mass recovery in the wake
   of the early-day storms with moderate to potentially strong
   instability forecast from the lower OH Valley into the Ozarks, south
   of the composite boundary. 

   Forecast soundings and plan-view kinematic fields indicate
   relatively strong low-level and deep-layer shear in the vicinity of
   the composite boundary across portions of MO/IL/IN Sunday afternoon
   into evening, where the highest probability of supercells and/or
   bowing structures capable of all hazards (including strong
   tornadoes) is expected to exist. However, as was alluded to in the
   initial Day 2 discussion, and is still the case, there is
   considerable latitudinal variability in the composite boundary
   location. As such, uncertainty remains too high to delineate higher
   severe-weather probabilities for this region.  


   ...Central High Plains...
     
   A trailing vorticity lobe and western extension of a 40-50 kt
   mid-level jet maximum are expected to support weak cyclogenesis
   along a front or trough pushing into the region from the west. Ahead
   of that boundary, steep low/mid-level lapse rates and modest
   boundary-layer moisture content are expected to yield moderate
   afternoon instability amidst sufficiently strong deep-layer shear to
   support supercell storm modes capable of large to very large hail.
   Most recent model guidance has shifted the corridor of preferred
   storm development and residence slightly east across portions of
   western and central NE into northwest KS, and the severe-weather
   probabilities have been adjusted accordingly. Storms may congeal
   into clusters Sunday evening with the severe-weather threat
   transitioning more to damaging winds.


   ...Southern Kansas and northern Oklahoma into the Ozark Plateau...

   High-resolution model guidance suggests that a sub-synoptic-scale
   surface low/frontal wave may evolve Sunday afternoon along the
   trailing front. Enhanced convergence near and east of that feature
   should be sufficient to overcome the cap and allow for isolated to
   widely scattered storm development. The combination of moderate to
   strong instability and around 40 kt of deep-layer shear will support
   supercells as the initial storm mode with a risk for large to very
   large hail. A largely parallel orientation of the deep shear vector
   to the surface front suggests the potential for merging storms
   within a few hours after initiation, with damaging wind potential
   increasing at that time. Storms are expected to grow upscale into
   one or multiple MCSs with at least an isolated damaging-wind threat
   spreading south through the Ozark Plateau region Sunday night.

   ..Mead.. 06/20/2026

   CLICK TO GET <a href="archive/2026/KWNSPTSDY2_202606201730.txt">WUUS02 PTSDY2</a> PRODUCT

   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z
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View the SPC's Day 2 Outlook

Go to our Safety Center for information about Severe Weather Safety

Tomorrow's Convective Outlook
...
Tomorrow's Tornado Outlook
...
Tomorrow's Wind Outlook
...
Tomorrow's Hail Outlook
...

Copyright 2026 Chris Rhodes Storm Photographer

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