347 FXUS64 KOUN 221902 AFDOUNArea Forecast Discussion National Weather Service Norman OK 202 PM CDT Mon Sep 22 2025
...New NEAR TERM, SHORT TERM...
.KEY MESSAGES... Updated at 154 PM CDT Mon Sep 22 2025
- Strong to severe storms are possible late this evening into overnight to with the main risk north of I-40. The main severe hazards would be large hail & damaging wind gusts with a low tornado risk.
- Storm chances continue Tuesday into Tuesday night across southern Oklahoma and into western north Texas. Storms may become severe with large hail and damaging winds with that risk area highest in southeast Oklahoma.
- A cold front on Tuesday will bring cooler near-normal temperatures by mid-week.
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.NEAR TERM... (Rest of today and tonight) Issued at 154 PM CDT Mon Sep 22 2025
There remains a Slight Risk for severe thunderstorms late tonight across our northern CWA. Otherwise warm to hot and muggy today under weak upper ridging. Hottest especially across southern Oklahoma and western north Texas where surface moisture is highest producing heat index values just about 100 degree.
A positively tilted trough will remain in place across the Central Rockies of Colorado & Utah although may not be digging into the Southern Plains till the end of the short-term period? However a series of shortwaves embedded downstream from the main trough will be moving across our area as an MCS late this evening & overnight. Meanwhile a second trough/system across the Upper Midwest/Great Lakes Region will be pushing an initial surface front across the Central Plains and into our area although latest guidance suggesting it may not arrive into our northern CWA until perhaps a few hours before Sunrise Wednesday morning. Should the surface front not arrive earlier than expected then early morning convection would be elevated with the MCS coming through. However strong southerly low- level jet flow between the 925-850 mb layer may be sufficient in transporting gulf moisture into the mid-levels fueling the shortwave forcing for storm activity. The more aggressive NAM projecting strong elevated instability with more moderate MUCAPE values with the ECMWF model as most likely solution would be in-between. Both solutions agree with strong deep-layer shear with the southerly low- level winds veering westerly aloft. With this environment still could see severe storms tonight across our CWA generally north of I- 40 which could produce large hail across far northern Oklahoma to damaging wind gusts down to I-40. The tornado risk remains low but can`t rule it out based on the strong shear & moisture values. Northcentral Oklahoma could also see the heaviest rainfall which could pose an additional flooding hazard. As a result have a 3- county Flood Watch in effect in northcentral Oklahoma.
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.SHORT TERM... (Tuesday through Wednesday night) Issued at 154 PM CDT Mon Sep 22 2025
The aforementioned surface front is expected to pushing through our area Tuesday afternoon keeping low rain/storm POPS in our area. By late afternoon heating could see surface-based storms initiate along and ahead of the surface boundary where the environment will be moderately unstable and strongly sheared. Expecting the surface boundary to be near to east and south of the I-44 corridor where the lower-end severe risk will with the higher-end risk in southeast Oklahoma. Severe hazards remain large hail & damaging wind gusts with a low but not completely zero risk for a tornado, with that risk higher in eastern Oklahoma.
By late Tuesday into Wednesday all of our area should be post- frontal as the aforementioned positively tilted trough starts digging into the Central & Southern High Plains. This will maintain low rain/storm POPs but in a weaker unstable environment should minimize the severe risks. Being post-frontal on Wednesday with a reinforcing cold front coming through and northwest winds, will see temperatures go below average and milder with highs in the mid 70s to lower 80s and a cooler night with widespread lows in the 50s.
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.LONG TERM... (Thursday through Sunday) Issued at 1209 AM CDT Mon Sep 22 2025
Precipitation chances will decrease significantly Thursday through the weekend with an Omega Block pattern slowly bringing a ridge over the Plains. Southeasterly surface flow will keep temperatures near- normal (80s) Thursday and Friday as the surface high spins to our east. However, temperatures will creep a bit warmer (near or slightly above average) by the weekend as the surface ridge strengthens and the upper ridge passes over the forecast area.
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.AVIATION... (18Z TAFS) Issued at 1213 PM CDT Mon Sep 22 2025
A stratus deck is quickly shrinking across western Oklahoma and should shortly leave KCSM and KWWR clear. Meanwhile, a cumulus field has developed across north central and central Oklahoma, yielding MVFR ceilings. Expect these to lift within the next few hours. A storm complex is expected out of Kansas overnight into tomorrow morning, though southward extent is somewhat uncertain. We`ll also be watching for the possibility of a few isolated storms developing out ahead of this complex in northern Oklahoma.
Day
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.PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 73 88 65 76 / 30 50 30 20 Hobart OK 73 90 64 81 / 20 30 30 10 Wichita Falls TX 75 95 67 82 / 10 30 50 20 Gage OK 64 79 58 75 / 30 20 20 20 Ponca City OK 68 84 63 76 / 70 80 20 30 Durant OK 73 94 69 81 / 10 30 80 30
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.OUN WATCHES/WARNINGS/ADVISORIES... OK...Flood Watch from 1 AM CDT Tuesday through Tuesday afternoon for OKZ007-008-013.
TX...None. &&
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NEAR TERM...68 SHORT TERM...68 LONG TERM....23 AVIATION...14
NWS OUN Office Area Forecast Discussion