Day 1 Areal Outline

Issued: 2026-08-20 19:57 UTC

Summary

There is a slight risk of tornadoes, large hail, and damaging winds across much of the central and eastern United States throughout Thursday, August 20, 2026. Marginal and slight risks of severe thunderstorms are also expected across a wide area of the country.

Product Text

000 WUUS01 KWNS 201957 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0255 PM CDT THU AUG 20 2026 VALID TIME 202000Z - 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 40127600 40167483 40017448 39067489 38767544 38717690 38877721 39237738 39717697 && ... HAIL ... 0.05 36757499 36217756 36107804 36047837 36307868 36647862 37407832 38447770 39567683 40467576 40587413 40237226 0.05 35378757 35508659 35448612 35328580 35068560 34698577 34428594 34238642 33578837 33328964 33119085 33149133 33319167 33789189 34209178 34459136 34659068 35378757 0.05 38840141 39630159 41850115 44309815 45169679 47119464 48149410 48349345 48269265 47929174 46859098 45489072 44829100 43549285 40989711 40289786 39149788 38089796 37669838 37459908 37499942 37669993 38420099 38840141 0.15 40599817 39449854 39229942 39400009 39610044 40520058 41810011 43089842 44439641 45659504 46639415 46809354 46789302 46629254 46119150 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 44329811 45179679 47159462 48149411 48349348 48279265 47919172 46879101 45479070 44859097 43499291 41209678 40579715 39929726 38939727 38259725 37579749 37259809 37079888 37080025 37410091 39500161 40910142 41850116 44329811 0.05 31531269 33081385 34031405 34731336 34791200 33931004 33340939 30860942 0.05 36787472 35367640 35127747 34097915 33607988 33258062 33298161 33368266 33328353 32928404 32528441 31998442 31498401 31238316 30978178 30528115 30108097 29758154 29398336 29368393 99999999 29388741 31298950 31579014 31979160 32199281 33579507 34139536 34839501 34889350 34999175 35968632 37108176 38237980 39237804 40687654 40977393 40477119 0.15 34049244 34519175 35518656 35438608 35178514 34748486 34288507 33878542 33248639 33029110 33159205 33559250 34049244 0.15 37267481 36337671 34858106 34908192 35158226 35478216 37357899 38547791 39227754 39947685 40627571 40717405 40227217 0.30 37897452 37867659 38177736 39147715 39577684 40257600 40277379 39987273 CIG1 40160022 41610006 43219796 42519700 40839749 39179769 38159811 37869881 37959949 38210012 40160022 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 34049244 34519175 35518656 35178514 34748486 34288507 33878542 33248639 33029110 33159205 33559250 34049244 SLGT 37097516 36337671 34858106 34908192 35158226 35478216 37357899 38547791 39227754 39947685 40627571 40717405 40247226 SLGT 41810011 43089842 44439641 45659504 46639415 46809354 46789302 46119150 45849116 45659109 45439114 43669374 42349600 40599817 39449854 39229942 39400009 39610044 40520058 41810011 MRGL 31531269 33081385 34031405 34731336 34791200 33931004 33340939 30860942 MRGL 40910142 41850116 44309815 45179679 47159462 48149411 48349348 48279265 47919172 46859098 45479070 44859097 43499291 41619606 40409692 40129723 38259725 37579749 37259809 37079888 37080025 37410091 39500161 40910142 MRGL 36437514 35367640 35127747 33607988 33258062 33368266 33328353 32928404 32528441 31998442 31498401 31238316 30978178 30528115 30108097 29758154 29398336 29368393 99999999 29598764 31298950 31579014 31979160 32199281 33579507 34139536 34839501 34999175 35968632 37108176 39237804 40687654 40977393 40517141 TSTM 32691824 34421731 35501643 37411468 38251400 39991260 41251231 42191180 42901078 43230952 43010884 42150860 40940853 40460803 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 36829007 37618931 38248756 38698587 39048553 39488530 39938523 40708504 41088482 41198437 41228367 40948244 40688140 40618031 40717854 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 45 S BNA 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 15 W ABE 0 - EWR 60 SE ISP THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 35 NW BBW 45 NNE ONL 20 ENE BKX 25 SE AXN 15 N BRD 40 NE BRD 40 SSW HIB 40 SW 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 0 - HON 20 WSW VVV 30 SSE BJI 45 SW INL 15 SSW INL 40 ESE INL 0 - ELO 20 N 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 E ECG 40 ENE EWN 20 NNE OAJ 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 20 E PRX 35 N PRX 25 WSW RKR 35 NE LIT 25 ESE BNA 35 WSW BLF 10 SSW MRB 35 NNE CXY 20 NE EWR 45 S BID GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 60 W SAN 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 25 W 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 20 E POF 10 SSW MDH 15 N EVV 35 NNW SDF 60 N SDF 55 S MIE 25 SSE MIE 20 SSE FWA 20 ENE FWA 40 SW TOL 15 N FDY 10 NNE MFD 15 S CAK 10 NNW PIT 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