Day 1 Areal Outline

Issued: 2026-08-21 05:58 UTC

Summary

There is a slight risk of tornadoes, large hail, and damaging winds across portions of the Central and Eastern United States and the Great Lakes region throughout Friday, August 21. Marginal and slight risks of severe thunderstorms are also forecast for various areas including parts of the South and Midwest.

Product Text

000 WUUS01 KWNS 210558 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 1256 AM CDT FRI AUG 21 2026 VALID TIME 211200Z - 221200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 43288770 41638771 40848845 40198971 40099082 40149145 40669154 41139121 42179067 42799006 43468942 43618878 43628832 43288770 && ... HAIL ... 0.05 43740069 42809787 41879620 41199468 41199303 41759128 43389045 44858869 44948782 44628722 42838744 41468731 40648777 39958878 39438962 38659218 38469480 38349847 38610054 38940174 39450216 40880264 41790295 42340331 42800346 44050370 44330271 43740069 0.05 32337819 33748136 34228200 35378239 35998223 36888043 37037768 36287456 0.15 40160134 41780260 42410290 43520329 43770267 43460153 42990036 42499878 41909735 41469634 40979589 40339572 39949607 39869692 39839782 39899934 39920045 40160134 0.15 41939067 42918952 43078933 42948834 42788801 42128768 40648849 40118973 40159115 40639143 41939067 CIG1 42749819 42349743 42089700 41199547 40249535 39939577 40099681 40489836 40439978 40590136 40700189 41000227 42470321 43860346 44130260 43279998 42749819 && ... WIND ... 0.05 31308028 30938229 29878825 29329000 29449154 29979317 31009445 31699522 32539605 32989591 33069572 32629382 32419288 32209085 32608791 32838550 33078456 33458393 33988351 34408338 35028327 35618295 36238198 36898031 36687759 36277612 36077530 36137464 0.05 41528620 40638677 40068751 39378825 39088868 38709032 38889183 38629313 38089428 37419542 37269644 37329731 37789867 38039967 38120075 38290163 38660243 39200279 40250339 41460407 43200392 44030367 44340277 44100191 43299950 42729781 41909635 41209470 41209295 41709130 42629091 43339046 44258947 44888868 44988790 44468638 42518570 41528620 0.15 42339928 41269715 40639632 39889603 39269638 38989689 38839754 38889827 39110007 39580099 40350163 41180214 41650239 42100264 42590231 42770142 42339928 0.15 42559042 43488954 44248860 44358792 43968742 42948757 42208730 41498711 41098740 40448827 39999005 40039076 40159119 40669146 41489082 42559042 0.15 33158219 35128114 35608021 35797874 35717758 35547714 35177693 34977706 34597785 34127873 33527988 32758050 32588105 32528150 32508157 33158219 CIG1 41219899 40009767 38759617 38299585 37959554 37629576 37639668 37719757 38179879 38640159 39160227 39950282 41830351 43170327 43740271 43380152 42840043 41529935 41219899 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 35128114 35608021 35797874 35717758 35547714 35177693 34977706 33527988 32758050 32508157 33158219 35128114 SLGT 43770267 43460153 42990036 42499878 41909735 41469634 40979589 40339572 39959606 39889603 39269638 38989689 38839754 39110007 39580099 40350163 41780260 43520329 43770267 SLGT 41959064 42559042 43488954 44248860 44358792 43968742 42948757 41498711 41098740 40448827 39999005 40039076 40159119 40669146 41959064 MRGL 31248059 29878825 29329000 29449154 29979317 31009445 32539605 32989591 33069572 32419288 32209085 32608791 32838550 33078456 33458393 33988351 35028327 35618295 36238198 36888043 37037768 36427513 MRGL 43200392 44050370 44340277 43740069 42809787 41879620 41209470 41209300 41759128 42629091 43389045 44888868 44988790 44468638 42518570 41528620 40638677 39088868 38709032 38859154 38659218 38579323 38089428 37419542 37269644 37329731 38039967 38120075 38290163 38660243 41460407 43200392 TSTM 49552013 48592046 47302056 45822048 43872052 43172060 42962100 42992165 43372238 44022247 45622226 46302248 46712329 47022408 47732445 48052430 48202382 48102313 47902296 47292320 47002288 47102235 47572213 49662274 99999999 42348179 40318347 39298469 38408801 38048995 37829252 37419369 36859432 36209402 33989143 33398952 33768805 36428605 38418320 39608059 39837575 39477343 99999999 28819444 29749514 30299583 30589697 31229848 32580059 33030258 33510361 33580454 33110508 32680571 32090701 31260750 99999999 32071650 33361681 34091705 34561708 34781689 34901650 34591567 34581529 34861522 35871574 39011752 39901772 41371694 44291503 45441379 45691123 45420913 44510835 43190770 42430783 41780861 41250882 40660862 40500793 40690701 41100629 42300501 43720442 44390374 44600306 44439973 42829560 42429459 42449372 42919301 44619138 47098860 48348679 99999999 48739038 47149111 45909203 45549288 45659399 46469522 47959632 49789724 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 15 WSW CLT 40 SSW GSO 0 - RDU 20 ESE RWI 35 N EWN 10 NE EWN 0 - EWN 45 NNE CHS 30 WSW CHS 35 NW SAV 20 SW AGS 15 WSW CLT THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 25 SE RAP 40 S PHP 15 NE VTN 0 - ONL 0 - OFK 25 SSW TQE 25 S OMA 20 NNW FNB 25 WSW FNB 25 WSW FNB 20 ENE MHK 15 SW MHK 0 - SLN 25 SW HLC 50 SSW MCK 10 S IML 20 SSE AIA 40 SSW RAP 25 SE RAP THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 30 S DBQ 20 NE DBQ 25 NNW MSN 20 N OSH 15 SE GRB 15 SE MTW 15 NE RAC 0 - VPZ 30 SW VPZ 30 N CMI 20 WNW SPI 25 ENE UIN 15 N UIN 20 WSW BRL 30 S DBQ THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 50 E SSI 55 S MOB 35 W BVE 40 ESE 7R4 10 SSE LCH 25 SE LFK 40 NNE CRS 50 SSW PRX 40 SSW PRX 50 NNE IER 50 NNE HEZ 45 SSW TCL 15 NNW AUO 30 E LGC 30 ESE ATL 10 WNW AHN 50 NW AND 20 SSW HSS 30 SE TRI 20 SE PSK 30 NE AVC 60 E ECG THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 50 WNW CDR 30 W RAP 25 NE RAP 50 SSW PIR 25 WSW YKN 0 - TQE 50 NE SDA 10 SE OXV 25 ESE CID 20 NNW DBQ 15 NW LNR 40 NW GRB 35 NNE GRB 15 NNW MBL 20 NNW AZO 15 SSE SBN 15 NNE LAF 35 NNE SLO 0 - STL 35 ENE JEF 0 - JEF 20 ESE SZL 60 SSE OJC 20 S CNU 40 NW BVO 25 SSE ICT 25 NE DDC 15 N GCK 55 WNW GCK 40 SSW ITR 40 S TOR 50 WNW CDR GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 80 NNW OMK 45 WNW OMK 20 WSW EAT 35 ENE DLS 40 SE RDM 70 N LKV 65 NNW LKV 60 N LMT 75 NNE MFR 40 E EUG 15 E PDX 50 N PDX 25 SW OLM 10 WNW HQM 15 SSE UIL 15 ENE UIL 15 WNW CLM 15 E CLM 30 ESE CLM 25 NNW OLM 0 - OLM 25 S SEA 10 NE SEA 60 N BLI ...CONT... 65 N CLE 40 NW CMH 20 NW LUK 35 NW EVV 35 S BLV 20 WNW TBN 20 NW SGF 25 SSE JLN 15 NNE FYV 30 NE LLQ 35 ESE GWO 25 ENE CBM 45 SSE BWG 35 W HTS 40 S HLG 15 NW ILG 60 SE NEL ...CONT... 40 SSE GLS 10 NE HOU 35 SW UTS 35 W CLL 50 SE BWD 55 WNW ABI 45 ENE HOB 60 NNW HOB 20 N ROW 35 SE SRR 25 ESE ALM 40 WNW ELP 70 S DMN ...CONT... 35 S CZZ 40 WSW TRM 25 ENE RAL 25 SW DAG 10 SW DAG 15 ENE DAG 60 WSW EED 40 WSW EED 35 W EED 35 WSW LAS 35 SSW U31 40 NW U31 55 N BAM 65 NNW SUN 25 N SMN 0 - BZN 40 SW BIL 40 NNW WRL 40 ENE RIW 55 NW RWL 25 ENE RKS 25 SSE RKS 50 ENE VEL 20 W CAG 30 ENE CAG 35 WSW LAR 35 SSE DGW 70 SE GCC 40 NW RAP 40 N RAP 25 E PIR 25 NW SLB 20 WSW FOD 25 ESE FOD 25 SE MCW 20 SSE EAU 10 SW CMX 130 NNE MQT ...CONT... 70 N GNA 15 ESE BFW 65 S DLH 50 NNE MSP 0 - STC 40 NNE AXN 10 SW TVF 70 N HCO