Day 1 Areal Outline

Issued: 2026-08-20 16:35 UTC

Summary

Severe thunderstorms bringing a risk of tornadoes, large hail, and damaging winds are expected across portions of the central and southern United States through August 21. Areas ranging from the Plains to the Southeast face varying levels of risk, including marginal to slight chances for severe weather.

Product Text

000 WUUS01 KWNS 201635 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 1133 AM CDT THU AUG 20 2026 VALID TIME 201630Z - 211200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 39650081 41180068 45129603 46729393 46749248 46389143 45609149 45169210 42759525 40409692 39489792 39129894 39189978 39650081 0.02 38657799 39587753 40077664 40467591 40797436 40827364 40537306 40147312 38967431 38267499 37647542 37577604 37627705 38037788 38657799 0.05 39497424 38167584 38427730 38787763 39117749 39727698 40137602 40207468 40067425 39567418 39497424 CIG1 39717697 39927647 39947527 39607491 39067489 38767544 38717690 38877721 39237738 39717697 && ... 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 33189493 33829525 34359504 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 34049244 34519175 35218693 35278591 35178514 34748486 34288507 33878542 33248639 33029110 33159205 33559250 34049244 0.15 37267481 36337671 34858106 34908192 35158226 35478216 37357899 38547791 39227754 39947685 40457588 40567411 40227217 0.30 37897452 37867659 38177736 39247739 39727696 40127601 40277379 39987273 CIG1 40160022 41610006 43219796 42519700 40839749 39179769 38159811 37869881 37959949 38210012 40160022 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 34049244 34519175 35218693 35278591 35178514 34748486 34288507 33878542 33248639 33029110 33159205 33559250 34049244 SLGT 37097516 36337671 34858106 34908192 35158226 35478216 37357899 38547791 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 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 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 33189493 33829525 34359504 34889350 34999175 35848612 37108176 38237980 39567883 40687710 40977393 40517141 TSTM 31551665 34421731 35501643 37411468 38251400 39991260 41251231 42191180 42901078 43230952 43010884 42150860 40830874 40310826 40160707 40020545 39300401 37320218 37010148 37030113 37370109 38430170 39930197 42120164 44029926 44949769 46999636 49659523 99999999 48488607 46298677 44388750 42408926 42259159 42359324 41239569 40099613 39329626 38579602 37879555 37169454 36019261 35939224 35939149 36109050 36849004 40028270 40498115 40737844 41657421 41677225 41357071 40206948 99999999 28478992 29258963 30158992 30238997 30669117 31849408 32019446 33479758 33699911 33260177 32340365 30890621 99999999 32447885 32868136 32938254 32748348 32238356 31538235 30708047 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 30 WSW PBF 25 NNE PBF 40 NNW HSV 45 WNW CHA 10 NNE CHA 30 SE CHA 0 - RMG 30 NE ANB 30 SE BHM 30 SSW GLH 40 SSW LLQ 30 NE ELD 30 WSW PBF THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 60 SSE WAL 30 W ECG 25 SSW CLT 0 - SPA 15 N GSP 20 E AVL 10 E LYH 40 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 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 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 45 SE PRX 15 NE PRX 40 WNW 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 GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 75 S CZZ 35 NNE RAL 50 NNE DAG 15 SSW P38 50 NNE P38 20 SE DPG 15 WNW OGD 25 E MLD 50 S JAC 55 NNE BPI 15 NNW LND 45 S LND 55 SSE RKS 40 WSW CAG 35 NNW EGE 35 SW FCL 20 W LIC 25 NW EHA 25 N GUY 10 W LBL 25 NNW LBL 65 S GLD 40 NNW GLD 30 W MHN 20 N 9V9 25 W ATY 20 ENE FAR 50 N RRT ...CONT... 150 NNE MQT 40 NNE ESC 20 NNE MTW 15 NNW RFD 25 NNE CID 55 S MCW 10 ESE OMA 30 W FNB 25 ENE MHK 20 NNE EMP 15 NNW CNU 0 - JLN 15 SSW FLP 25 SE FLP 15 NNE BVX 20 NNE JBR 25 ENE POF 10 E CMH 35 SSE CAK 30 NNW AOO 15 W POU 25 NNW GON 25 SSE EWB 80 SSE ACK ...CONT... 65 SSW BVE 15 WSW BVE 15 SSW ASD 10 SW ASD 10 N BTR 45 SSW SHV 30 SSE GGG 45 NNW FTW 40 WSW SPS 30 S LBB 35 SW HOB 65 S ELP ...CONT... 85 S CRE 50 N SAV 45 SW AGS 10 ENE MCN 35 S MCN 20 N AYS 65 ESE SSI