Day 1 Areal Outline

Issued: 2026-09-20 05:21 UTC

Summary

Severe thunderstorms, including the potential for tornadoes, large hail, and damaging winds, are expected across portions of the central and southern United States on Sunday, September 20. Risk levels vary from marginal to slight in several regions, with general thunderstorms forecast across a wide area.

Product Text

000 WUUS01 KWNS 200521 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 1219 AM CDT SUN SEP 20 2026 VALID TIME 201200Z - 211200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 37830258 37810311 37920360 38350391 38990395 39570389 39990355 40200330 40240250 40080204 39840178 39400152 38690148 38270172 38010201 37830258 && ... HAIL ... 0.05 36899731 37079682 37399554 37689396 37669317 37569281 37399259 37079253 36609275 35749335 34309476 33159688 32679847 32350032 32400122 32750172 33320197 34410202 35240203 35870215 35980225 36810322 37550414 38200447 39430445 40200427 40650394 41080314 41290243 41200186 40960144 40270105 39280086 38260087 37730082 37360058 36900026 36579964 36509904 36649827 36899731 0.15 38300171 38020202 37850246 37820309 37920362 38340391 38980397 39560389 39990357 40190330 40230259 40090207 39930187 39430153 38790147 38300171 && ... WIND ... 0.05 37598910 35709340 34319479 33219674 32659843 32350029 32410121 32770172 33350197 34240200 35330205 35890215 36570292 37550415 38200450 39420449 40240427 40660396 41080315 41300241 41220190 40930142 40270104 39190085 38150090 37670082 36880028 36569963 36509899 36769778 37279621 37869478 39459110 40438620 40278304 39728091 38717870 38187803 37727784 37437791 37217809 36727873 36647926 36898003 37538090 37938185 38248352 38218508 38028794 37598910 0.15 34569539 34269597 33709712 33619780 33649849 33929879 34129888 34399892 34659889 35059869 35609820 36149741 36569630 36649555 36489488 36159450 35719442 35319446 34989477 34569539 0.15 38000204 37830257 37820310 37950358 38340390 39010394 39570387 39980358 40180331 40230253 40100206 39880180 39430153 38730147 38280172 38000204 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 34659889 35059869 35609820 36149741 36569630 36649555 36489488 36159450 35719442 35319446 34989477 34569539 33709712 33619780 33649849 33929879 34399892 34659889 SLGT 39560389 39990357 40190330 40230253 40100206 39880180 39430153 38730147 38280172 38000204 37830257 37820310 37920362 38340391 38980397 39560389 MRGL 39420449 40240427 40660396 41080315 41300241 41220190 40930142 40270104 39190085 37730082 36900026 36579964 36509902 36569872 36809766 37279621 39459110 40438620 40278304 39728091 38717870 38187803 37727784 37437791 37217809 36727873 36647926 36898003 37538090 37938185 38248352 38028794 37598910 35719338 34309476 33219674 32659843 32350032 32400122 32750172 33320197 35330205 35870215 37550415 38200450 39420449 TSTM 31290710 32180674 32560634 33880424 34810301 35260284 35780287 36080324 36790431 37570497 40180599 41260691 42610901 43230903 43940890 44430803 45100604 44700213 43680082 42449941 41659886 40509858 39429858 39029853 39349759 39949670 40599583 40849521 40929492 41539197 42009047 42328505 42178287 42108244 41448002 41187823 40877493 40567402 40297371 39807391 39007524 37927668 35807909 35267948 35027943 34617883 34667810 35097459 99999999 24909730 25449758 25869761 26849782 27509800 28269790 29049732 29799652 30459515 30869360 31419091 34578977 36028774 36798628 37298634 37518708 36888957 35479312 32979447 30079790 28579966 27390046 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 20 E LTS 30 NNW FSI 35 NNW CHK 30 ESE END 20 SW BVO 30 ESE BVO 10 SW GMJ 20 WNW FYV 25 SW FYV 0 - FSM 10 WSW RKR 30 SE MLC 25 W GYI 45 ESE SPS 25 S SPS 15 WSW SPS 25 SE LTS 20 E LTS THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 25 NNW LIC 25 SW AKO 0 - AKO 35 E AKO 35 SW IML 35 N GLD 10 ENE GLD 45 SSE GLD 55 ENE LAA 35 E LAA 20 SSE LAA 25 ESE LHX 10 SSW LHX 30 NW LHX 25 SW LIC 25 NNW LIC THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 30 SE DEN 45 NE DEN 50 NW AKO 10 W SNY 35 ENE SNY 50 NNW IML 30 NNE IML 25 WNW MCK 45 ESE GLD 15 SSW GCK 40 ESE LBL 20 NNE GAG 25 SW AVK 15 S AVK 35 NNE END 35 NNW BVO 35 S UIN 50 N IND 20 NNW CMH 35 SSW HLG 30 NNE SHD 25 E CHO 35 WNW RIC 35 W RIC 35 N AVC 35 ENE DAN 0 - DAN 30 S ROA 20 SE BKW 35 SSW CRW 50 N JKL 20 W EVV 15 SSE MDH 35 NNW RUE 25 NW DEQ 25 NNE DAL 25 WSW MWL 40 W ABI 20 NE BGS 40 NNW BGS 25 SSW LBB 20 WNW AMA 25 ESE DHT 20 NNE TAD 0 - PUB 30 SE DEN GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 55 SW ELP 35 NW ELP 25 SW ALM 45 NNE ROW 35 NNE CVS 45 E TCC 25 SW DHT 25 S CAO 10 ENE RTN 40 WNW TAD 55 WSW FCL 40 SSE RWL 20 SW LND 30 NNW LND 40 S COD 30 N WRL 40 SW 4BQ 50 NNW PHP 45 ESE PHP 30 ESE ANW 15 ESE BUB 10 SW HSI 40 NNE RSL 20 NE RSL 15 SSE CNK 25 S BIE 25 WSW SDA 15 ENE SDA 30 ENE SDA 25 SSW CID 30 SSE DBQ 25 ENE AZO 30 S MTC 40 SSE MTC 10 WNW FKL 30 NW UNV 30 ENE ABE 10 SE EWR 25 S JFK 30 SE NEL 15 SE DOV 30 SSW NHK 20 WSW RDU 0 - SOP 15 SSW SOP 25 S FAY 30 NNW ILM 60 E HSE ...CONT... 70 S BRO 35 SSW BRO 15 WSW BRO 50 NNE MFE 15 S ALI 15 WSW NIR 30 WNW VCT 55 S CLL 25 SE UTS 30 WSW POE 25 ESE HEZ 20 NW UOX 45 SSW CKV 15 SSE BWG 25 N BWG 15 SSE OWB 25 S CGI 15 N RUE 45 NNE GGG 20 SW AUS 30 WNW COT 60 W LRD