Day 1 Areal Outline

Issued: 2026-08-13 12:40 UTC

Summary

Severe thunderstorms, including risks of tornadoes, large hail, and damaging winds, are expected across portions of the central and eastern United States today. The highest risks for severe weather include marginal and slight threats across various regions from the Plains through the Mississippi Valley and into the Northeast.

Product Text

000 WUUS01 KWNS 131240 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0738 AM CDT THU AUG 13 2026 VALID TIME 131300Z - 141200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 38808557 39308812 40329169 40849323 41199362 41579295 42099285 42129179 41508891 40718648 40058523 39418488 38808557 && ... HAIL ... 0.05 42090404 41860286 41510176 41240020 41659843 42509660 42329589 41739551 41159507 40779431 41589296 42339282 42419112 42198937 40918569 39628296 38978231 38068187 37438208 36948261 36708329 36778412 38988914 39789087 40169310 39629456 38369678 37509837 37030112 36970279 37050322 37260396 38250480 38630498 39720548 41200546 41790538 42050460 42090404 0.05 42536969 43587201 44467333 45427393 && ... WIND ... 0.05 39451987 40631963 41621911 41811801 41471756 40941662 41241469 41391229 41371115 41031081 40091092 38661165 37231267 36221352 35741457 35821551 37041774 37601851 38331928 39451987 0.05 39840561 41210551 41810540 42090491 42120399 41880287 41510175 41270018 41659844 42079695 41949595 41659522 41729433 41929388 42769333 42829243 42268925 40768517 39648288 38828212 38148179 37488190 36898257 36618341 36668413 36958644 37998829 38918985 39539178 39829317 39569453 37829708 35549964 34450023 33590105 33420147 33570200 34800210 36390213 36870254 37200398 38080482 39840561 0.05 42526969 43597203 44477334 45427392 0.15 40609372 40769432 41589297 42329284 42299248 41528914 40778766 40338754 39728761 39328801 39588902 40309147 40609372 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 41589297 42329284 41528914 40778766 40338754 39728761 39328801 40309147 40609372 40769432 41589297 MRGL 41810540 42090491 42120399 41880287 41510175 41270018 41669841 42509660 42329589 41789554 41659522 41729433 41929388 42769333 42829243 42268925 40768517 39648288 38828212 38148179 37488190 36898257 36618341 36668413 36958644 38918985 39539178 39829317 39569453 37829708 35549964 34450023 33590105 33420147 33570200 36390213 36870254 37200398 38080482 39840561 41810540 MRGL 40631963 41621911 41811801 40941662 41241469 41391229 41371115 41031081 40091092 38661165 37231267 36221352 35741457 35821551 37041774 37601851 38331928 39451987 40631963 MRGL 42526969 43597203 44467333 45427393 TSTM 26579666 27059754 27559780 28279767 28819691 29199617 29269566 29199484 28859423 99999999 40257207 42177297 43247477 44577730 99999999 49859995 47580027 46920088 45950177 45080222 44260199 43960109 44059958 44779616 45309450 45469271 44999018 43958838 39918233 37538018 35838035 34667969 33067799 99999999 28708819 29478932 29868993 30229060 30749087 31029072 31339036 31699000 33088944 33878941 34548930 35138890 35638844 36208850 36968928 37729178 38119364 38029493 37569608 36429807 35519923 33680002 31080190 28170273 99999999 32041552 33031531 33721528 34411546 34971575 35601620 35981658 36111704 36031798 36361892 37051991 37442031 37962054 38462092 39392143 40292213 40332228 40132260 39882318 40102362 41462376 42182315 42532233 42972208 43612201 44082186 44462120 45011994 46181809 47371796 47651850 47711985 46782100 46752194 50312202 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 20 NNE OXV 25 SW ALO 25 WNW MMO 40 N DNV 10 NNE DNV 25 NW HUF 20 SE MTO 30 NNW UIN 10 E LWD 25 WNW LWD 20 NNE OXV THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 35 NNE LAR 40 W TOR 10 ENE TOR 10 SSW AIA 50 SW MHN 30 ENE LBF 50 N GRI 15 WNW SUX 25 ESE SUX 15 SSW DNS 25 SSE DNS 35 WNW DSM 30 NNW DSM 25 S MCW 20 N ALO 10 WNW RFD 15 S FWA 25 S CMH 30 SSE UNI 20 SW CRW 40 WNW BLF 30 NNW TRI 50 SE LOZ 30 S LOZ 0 - BWG 10 E ALN 40 SW UIN 20 E CDJ 25 ENE FLV 20 ENE ICT 30 WNW CSM 0 - CDS 45 E LBB 25 SE LBB 10 WSW LBB 35 NE DHT 30 S SPD 20 ESE TAD 20 SW PUB 40 W DEN 35 NNE LAR THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 80 N RNO 75 ESE LKV 55 S REO 25 NNE BAM 50 NW ENV 20 NW OGD 10 NW EVW 20 SSE EVW 35 NNW PUC 55 WNW 4HV 40 SE CDC 60 S SGU 40 SE LAS 25 SW LAS 40 ESE BIH 20 NNW BIH 55 SE TVL 0 - RNO 80 N RNO THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 65 NNE HYA 15 ESE LEB 10 W BTV 55 NE MSS GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 65 NE BRO 50 S CRP 20 SE ALI 0 - NIR 0 - VCT 30 N PSX 15 NW LBX 10 SSW GLS 45 SE GLS ...CONT... 70 SSW BID 15 W BAF 30 ENE UCA 75 WNW ART ...CONT... 130 NNW DVL 60 NNE BIS 10 NNW BIS 20 E Y22 60 S Y22 25 NW PHP 25 ESE PHP 25 NNW 9V9 40 SSE VVV 30 SW STC 45 NNE MSP 30 WNW CWA 10 ESE OSH 25 W ZZV 20 NW ROA 30 SW GSO 35 N FLO 70 SE CRE ...CONT... 85 ESE BVE 10 NNE BVE 20 ESE MSY 25 NW MSY 20 NE BTR 20 SW MCB 10 NNE MCB 45 S JAN 45 SE GWO 35 S UOX 15 NE UOX 30 S MKL 25 E MKL 50 NNE MKL 25 SE CGI 20 E TBN 40 S SZL 40 NE CNU 35 WSW CNU 10 WNW END 15 N CSM 55 SSE CDS 65 SSE MAF 135 SSW 6R6 ...CONT... 55 S IPL 20 NE IPL 35 WNW BLH 55 WSW EED 60 E DAG 60 NNE DAG 60 SW DRA 45 NE NID 30 NW NID 55 ESE FAT 20 NNW FAT 15 NE MER 45 N MER 30 E SAC 60 N SAC 10 NNE RBL 15 N RBL 20 W RBL 50 N UKI 55 SSE EKA 35 SE CEC 20 SW MFR 30 ENE MFR 60 NNW LMT 60 SW RDM 35 WSW RDM 15 N RDM 70 SW PDT 10 ENE ALW 25 SW GEG 45 W GEG 25 NE EAT 25 NW YKM 50 SSE SEA 105 NNE BLI