Day 1 Areal Outline

Issued: 2026-08-20 12:47 UTC

Summary

Severe thunderstorms capable of producing tornadoes, large hail, and damaging winds are expected across parts of the central and southern United States throughout Thursday. These hazards pose a slight to marginal risk for various regions, including parts of the Plains, Midwest, and Gulf Coast states.

Product Text

000 WUUS01 KWNS 201247 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0746 AM CDT THU AUG 20 2026 VALID TIME 201300Z - 211200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 38927753 39647731 40077664 40467591 40797436 40827364 40537306 40147312 38967431 38267499 38017535 37827601 37917681 38397734 38927753 0.02 39650081 41180068 45129603 46729393 46749248 46389143 45609149 45169210 42759525 40409692 39489792 39129894 39189978 39650081 0.05 39937597 40297501 40307436 40147398 39837410 39487437 39097477 39037579 39087629 39207656 39477665 39937597 && ... HAIL ... 0.05 36757499 36217756 36107804 36047837 36307868 36647862 37407832 38447770 39567683 40187573 40157434 39907314 0.05 33368835 33269035 33249086 33689131 34149116 34899025 35428790 35458651 34918636 34158731 33658784 33368835 0.05 38840141 39630159 41820112 44009827 46169536 47439374 47519270 47189180 46729115 45919068 45119093 43549285 40989711 40289786 39149788 38089796 37669838 37459908 37499942 37669993 38420099 38840141 0.15 40599817 39449854 39229942 39400009 39610044 40520058 41810011 43089842 44429638 46309331 46579267 46329191 46119132 45849116 45659109 45439114 44859195 43669374 42349600 40599817 CIG1 42210018 43349857 43289726 42789678 42289692 41449715 40929768 40289809 39289828 38739859 38719939 38849987 39150099 39880124 41050097 41810066 42210018 && ... WIND ... 0.05 44329799 45579610 46659481 47369415 47549328 47339227 46829092 45459066 44859097 43499291 41209678 40579715 39929726 38939727 38259725 37579749 37259809 37079888 37080025 37410091 39500161 40910142 41850116 44329799 0.05 31531269 33081385 34031405 34731336 34791200 33931004 33340939 30860942 0.05 29388741 31298950 31579014 31979160 32199281 32819390 33229397 34149398 34889350 34999175 35848612 37108176 38237980 39567883 40687710 40977393 40477119 99999999 36787472 35437744 34527850 34097915 33607988 33258062 33298161 33368266 33328353 32928404 32528441 31998442 31498401 31238316 30978178 30528115 30108097 29758154 29398336 29368393 0.15 37267481 36337671 35997780 35997825 36337854 37037843 38447797 39227754 39947685 40457588 40567411 40227217 0.30 37897452 37687547 37787626 38407676 39627626 40147544 40277379 39987273 CIG1 40160022 41610006 43219796 42519700 40839749 39179769 38159811 37869881 37959949 38210012 40160022 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 37097516 36337671 35997780 35997825 36337854 37037843 38447797 39227754 39947685 40457588 40567411 40247227 SLGT 41810011 43089842 46309331 46579267 46119132 45849116 45659109 45439114 43669374 42349600 40599817 39449854 39229942 39400009 39610044 40520058 41810011 MRGL 31531269 33081385 34031405 34731336 34791200 33931004 33340939 30860942 MRGL 36557519 35437744 34527850 33607988 33258062 33368266 33328353 32928404 32528441 31998442 31498401 31238316 30978178 30528115 30108097 29758154 29398336 29368393 99999999 29598764 31298950 31579014 31979160 32199281 32819390 34149398 34889350 34999175 35848612 37108176 38237980 39567883 40687710 40977393 40517141 MRGL 40910142 41850116 44329799 45939567 46659481 47369415 47549328 47519270 46829092 46089078 45919068 45459066 44859097 43499291 41619606 40409692 40129723 38259725 37579749 37259809 37079888 37080025 37410091 39500161 40910142 TSTM 28829267 29609269 30809308 32019446 33479758 33699911 33260177 32340365 30890621 99999999 32041676 34291736 35141696 36741512 38411410 41151307 42041329 42741286 43341034 43090927 42390822 40880759 40230613 40150555 40770344 41270255 42030171 43849937 44899771 47659673 49819604 99999999 47728361 45108539 43878645 43148749 42188893 41789100 41249351 40849514 38969574 37879555 37179473 36979325 37809138 39138701 40498115 40737844 41657421 41677225 41357071 40206948 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 60 SSE WAL 30 W ECG 10 NNE RWI 20 WNW RWI 35 NNE RDU 30 NW AVC 35 NE CHO 25 ESE MRB 20 S CXY 25 WSW ABE 10 SSE EWR 55 SE ISP THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 35 NW BBW 45 NNE ONL 40 E BRD 30 SW DLH 35 SSW ASX 50 SSW ASX 55 NNE EAU 40 NNE EAU 40 SSE MKT 20 ESE SUX 15 E HSI 45 NNE RSL 25 ESE HLC 15 W HLC 40 S MCK 20 N MCK 35 NW BBW THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 95 S GBN 55 NE YUM 50 NE BLH 50 SE IGM 25 ENE PRC 25 S SOW 35 NNE SAD 45 SSE DUG THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 60 ENE ECG 30 E GSB 40 SE FAY 40 SSW FLO 20 SE OGB 40 W AGS 45 N MCN 25 NW MCN 30 E CSG 35 NNW ABY 10 ESE ABY 30 NNE VLD 25 WSW SSI 30 E JAX 25 ENE SGJ 20 SW SGJ 25 SW CTY 55 WSW CTY ...CONT... 65 SSW PNS 15 SW PIB 35 NE MCB 30 NW HEZ 35 NNE IER 25 N SHV 25 ENE DEQ 35 SW RUE 35 NE LIT 35 ESE BNA 35 WSW BLF 45 S EKN 45 WNW MRB 35 NNW CXY 20 NE EWR 45 S BID THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 30 NNE IML 15 SSW MHN 15 ESE HON 15 WNW AXN 35 WNW BRD 40 ESE BJI 25 WNW HIB 10 NE HIB 20 N ASX 30 SSE ASX 45 SSE ASX 55 NE EAU 25 E EAU 30 NE MCW 10 SSE TQE 10 NW BIE 30 WSW BIE 45 NNE ICT 0 - ICT 25 E P28 25 NNW AVK 40 E LBL 25 N LBL 10 NNE GLD 30 NNE IML GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 75 SSW 7R4 35 WSW 7R4 20 SSE POE 30 SSE GGG 45 NNW FTW 40 WSW SPS 30 S LBB 35 SW HOB 65 S ELP ...CONT... 45 SSW CZZ 25 NNE RAL 20 NNW DAG 45 N LAS 60 NNE P38 65 N DPG 45 SE BYI 20 SW PIH 25 SE JAC 35 NW LND 40 SE LND 25 N CAG 60 NE EGE 35 SW FCL 35 SW SNY 25 ENE SNY 35 W MHN 0 - 9V9 25 W ATY 30 SE GFK 70 NNW ROX ...CONT... 95 NNE ANJ 25 NNE TVC 30 SSW MBL 25 ENE MKE 10 E RFD 35 NW MLI 20 SSE DSM 15 ENE SDA 10 SW TOP 15 NNW CNU 15 W JLN 20 SSE SGF 30 SE VIH 20 W BMG 35 SSE CAK 30 NNW AOO 15 W POU 25 NNW GON 25 SSE EWB 80 SSE ACK