Day 1 Areal Outline

Issued: 2026-08-21 20:02 UTC

Summary

Severe thunderstorms, including risks of tornadoes, large hail, and damaging winds, are expected across much of the central and eastern United States through Friday. Various regions in the Plains, Midwest, and South face marginal to slight risks of severe weather, while general thunderstorms are forecast across a wide area including parts of the Pacific Northwest.

Product Text

000 WUUS01 KWNS 212002 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0300 PM CDT FRI AUG 21 2026 VALID TIME 212000Z - 221200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 42699075 43369011 43508969 43278875 42708771 41638771 40588824 40208919 40039015 40199100 40669154 41759140 42699075 0.02 41720224 42420269 42900259 43020156 42499984 42149876 41859851 41329910 41160029 41400170 41720224 && ... HAIL ... 0.05 32337819 33728140 34618236 35378239 36208200 36888046 37007790 36487518 0.05 43740069 42809787 41879620 40959453 40939334 41339227 41979142 42409126 42969109 43619057 44948867 45308783 45078715 43148732 41488708 40588755 39828838 39268952 39069222 38919329 38289564 38219822 38520118 38760183 39400245 40350323 41460382 42280384 43120380 44050370 44340277 43740069 0.15 40330162 41780260 43520329 43770267 43460153 42499878 41909735 41469634 40979589 40339572 39329635 39199695 39209805 39390002 39590099 40330162 0.15 41619109 42659077 43289007 43198945 42908878 42748780 41718751 41208753 40788783 40458830 39989008 40039078 40159119 40659147 41619109 CIG1 42809915 41849669 41449595 41019564 40369546 40029573 39529726 39330146 39880226 40880308 42200346 43710348 43940277 42809915 && ... WIND ... 0.05 41528620 40638677 40068751 39088868 38709032 39049222 38899330 38089428 37419542 37269644 37329731 38039967 38120075 38290163 38770288 41460407 43190392 44050370 44340277 44100191 42799787 41859615 40949450 40949333 41359227 41959144 42549121 43009108 43649056 44948869 45308785 45038696 44468638 42518570 41528620 0.05 28448009 28368074 28518101 28858124 30478181 30898211 30968251 29868839 29348962 29089078 29289200 29769329 29939427 30389496 32619743 33179774 33619751 33849698 33539401 32959316 32339217 32209085 32438839 32838550 33078456 33458393 33988351 35028327 35618295 36238198 36888047 37007783 36487516 0.05 39781570 40021696 40761729 42861780 43821712 44101617 44141424 43901212 43371164 40251203 39781258 39511348 39781570 0.15 33158219 35128114 35738007 36057911 36007780 35637699 35177693 34977706 34597785 34127873 33527988 32758050 32508157 33158219 0.15 41749107 42659079 43299010 43228947 42918878 42688751 41498711 41098740 40448827 39999005 40039076 40159119 40669146 41749107 0.15 42339928 41269715 40639632 39889603 39269638 38989689 38839754 39110007 39580099 40350163 41150216 41770260 42100264 42590231 42770142 42339928 0.15 29589077 30559371 31019496 31809552 32439521 32569456 32129352 31739189 31818877 31858749 31408697 30788705 30388738 30328806 30228930 29619023 29589077 CIG1 41109765 40189670 39319604 38579566 37959554 37629576 37639668 37859774 38349959 38640159 39160227 39950282 41830351 43400327 43740271 43390097 42789943 41879840 41109765 CIG1 39801571 40041694 40751728 42861778 43821712 44081619 44131426 43881213 43341167 40251203 39771262 39531350 39801571 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 32439521 32569456 32129352 31739189 31858749 31408697 30788705 30388738 30228930 29619023 29589077 31019496 31809552 32439521 SLGT 35128114 35738007 36057911 36007780 35637699 35177693 34977706 33527988 32758050 32508157 33158219 35128114 SLGT 43770267 43460153 42499878 41909735 41469634 40979589 40339572 39269638 38989689 38839754 39110007 39580099 40330162 41770260 43520329 43770267 SLGT 42659079 43299010 43228947 42918878 42688751 41498711 41098740 40448827 39989008 40039078 40159119 40659147 42659079 MRGL 28448009 28368074 28518101 28858124 30478181 30898211 30968251 29868839 29348962 29089078 29289200 29769329 29939427 30389496 32619743 33179774 33619751 33849698 33539401 32339217 32209085 32438839 32838550 33078456 33458393 33988351 35028327 35618295 36238198 36888047 37007783 36487517 MRGL 43190392 44050370 44340277 43740069 42809787 40959452 40949333 41359227 41969144 43009108 43649056 44948869 45308785 45038696 44468638 42518570 41528620 40638677 39088868 38709032 39049222 38899330 38089428 37419542 37269644 37329731 38039967 38120075 38290163 38770288 41460407 43190392 MRGL 43821712 44101617 44141424 43901212 43371164 40251203 39781258 39511348 39781570 40021696 40761729 42861780 43821712 TSTM 37608713 37498851 37708991 38179074 38289131 38159231 37759364 37369396 36869407 36539380 36369320 35979244 35539208 35089202 34159248 33879228 33559202 33359152 33289107 33409057 33599028 34418970 34738908 34898837 34958772 35358719 36238686 37138666 37418663 37598688 37608713 99999999 32281691 33841712 34501703 35341665 35931626 36581625 37201656 38081845 38511871 39301884 39911887 43881843 44631732 45701404 45841240 45281091 44670917 44310837 43810769 43100714 42940653 43120576 43450518 44530481 44920420 45000290 44690105 44269923 43299659 42369518 42089452 42199377 42659297 43659182 44579099 45179064 45639074 45959103 45959143 45849209 45489316 45489401 45529546 45489725 45960009 46440105 46890122 47180094 47129982 46919845 46809735 46839686 47089629 47579616 48019675 48459759 48979853 49579941 99999999 43228010 42208060 40818188 40188261 39658279 39308264 39068215 39268128 39758032 39967930 39867797 39307587 38857432 99999999 28649497 29369577 30819678 32259880 33000040 32670285 32010664 31480749 99999999 49422034 48592046 47302056 45822048 43872056 43402060 43142094 43042134 43062188 43252218 44022233 45622225 46302248 46712329 47022408 47732445 48052430 48202382 48102313 47902296 47292320 47002288 47102235 47572213 49492272 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 10 ENE TYR 15 NE GGG 30 SE SHV 35 NE ESF 40 NW GZH 0 - GZH 25 NNE PNS 15 WSW PNS 20 SW GPT 25 S MSY 0 - HUM 20 SW LFK 40 S TYR 10 ENE TYR THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 15 WSW CLT 25 SSW GSO 25 NW RDU 10 NNE RWI 40 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 0 - ONL 0 - OFK 25 SSW TQE 25 S OMA 20 NNW FNB 20 ENE MHK 15 SW MHK 0 - SLN 25 SW HLC 50 SSW MCK 15 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 20 NNW DBQ 0 - LNR 10 NW MSN 25 NNE JVL 15 ESE RAC 0 - VPZ 30 SW VPZ 30 N CMI 25 WNW SPI 25 ENE UIN 15 N UIN 20 WSW BRL 20 NNW DBQ THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 40 NE MLB 20 NNW MLB 20 E ORL 20 NNE ORL 10 WSW JAX 30 SE AYS 20 SSW AYS 55 S MOB 15 W BVE 35 S HUM 35 SSE 7R4 25 S LCH 15 W BPT 40 SE UTS 15 SSW FTW 30 NW FTW 55 N FTW 20 WNW GYI 0 - TXK 15 SSW MLU 50 NNE HEZ 20 ENE MEI 15 NNW AUO 30 E LGC 30 ESE ATL 10 WNW AHN 50 NW AND 20 SSW HSS 30 SE TRI 20 SE PSK 25 NNE AVC 60 ENE 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 40 NW LWD 25 SSW OXV 20 NNE OTM 15 ENE CID 45 NNW DBQ 25 SW VOK 40 NW GRB 40 SSE IMT 50 S ESC 15 NNW MBL 20 NNW AZO 15 SSE SBN 15 NNE LAF 35 NNE SLO 0 - STL 15 N COU 20 NE SZL 60 SSE OJC 20 S CNU 40 NW BVO 25 SSE ICT 25 NE DDC 15 N GCK 55 WNW GCK 50 NNW LAA 40 S TOR 50 WNW CDR THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 50 WNW BOI 35 N BOI 45 N SUN 25 N IDA 25 ESE IDA 35 S SLC 30 N U24 55 SSW DPG 25 NE P68 40 S BAM 25 WNW BAM 20 N REO 50 WNW BOI GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 10 SSE OWB 30 NNE PAH 30 E FAM 30 NNW FAM 25 ENE VIH 30 NNW TBN 40 NNW SGF 35 N UMN 10 W UMN 25 SSE UMN 0 - HRO 15 S FLP 30 WSW BVX 30 NNE LIT 30 W PBF 30 SW PBF 15 WSW LLQ 25 SSE LLQ 15 SSW GLH 25 ESE GLH 15 WNW GWO 10 WNW UOX 35 NNW TUP 50 NNE TUP 15 NNW MSL 50 NNE MSL 10 NW BNA 15 NW BWG 35 NNW BWG 20 ESE OWB 10 SSE OWB ...CONT... 35 SSE SAN 20 ESE RAL 30 SSW DAG 35 NNE DAG 55 SSW DRA 15 WSW DRA 50 NW DRA 50 N BIH 70 S NFL 15 SSW NFL 20 SW LOL 30 NE BNO 30 ESE BKE 40 N SMN 10 SSE BTM 35 SSE BZN 15 NW COD 30 NW WRL 20 SE WRL 35 WNW CPR 0 - CPR 30 NW DGW 50 N DGW 40 ENE GCC 55 SW 2WX 50 SE 2WX 45 WNW PIR 35 N 9V9 20 SSE FSD 15 S SLB 35 SSW FOD 35 SE FOD 30 WNW ALO 35 WSW LSE 30 SE EAU 45 ENE EAU 65 S ASX 40 S ASX 45 SSW ASX 70 S DLH 40 N MSP 0 - STC 25 S AXN 40 N ATY 35 NNE MBG 25 SSW BIS 25 WNW BIS 30 NNW BIS 50 ENE BIS 10 E JMS 25 WSW FAR 0 - FAR 25 NW DTL 35 S TVF 20 ENE GFK 40 NNW GFK 60 NNE DVL 105 NNW DVL ...CONT... 80 N ERI 25 WNW ERI 25 WSW CAK 20 NE CMH 25 S CMH 25 WNW UNI 10 SSE UNI 10 SE PKB 20 WNW MGW 25 SSE LBE 15 NW HGR 25 WNW DOV 45 SSE ACY ...CONT... 45 SE LBX 25 NW LBX 30 WNW CLL 30 NNE BWD 60 NW ABI 20 E HOB 20 NW ELP 55 SSE DMN ...CONT... 75 NNW OMK 45 WNW OMK 20 WSW EAT 35 ENE DLS 40 SE RDM 65 SSE RDM 70 NNW LKV 65 NNE LMT 65 N LMT 70 NNE MFR 45 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 50 N BLI