Day 1 Areal Outline

Issued: 2026-09-18 12:21 UTC

Summary

Severe thunderstorms, including a marginal risk of tornadoes, hail, and wind, are possible across parts of the central and eastern United States through Friday afternoon. These severe weather hazards are expected to impact various areas ranging from the Great Plains and Midwest toward the Atlantic coast.

Product Text

000 WUUS01 KWNS 181221 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0719 AM CDT FRI SEP 18 2026 VALID TIME 181300Z - 191200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 43689414 43459327 42739284 42189276 41759321 41649417 41779502 42719594 43689414 && ... HAIL ... 0.05 39821210 39951255 40111284 40461310 42011308 42841326 43841374 44491363 45041295 45231196 44331105 43781087 42441076 41621082 40611105 40071138 39861174 39821210 0.05 42719592 43669415 43439327 42739284 42219275 41759320 41649416 41759502 42719592 && ... WIND ... 0.05 39691192 39661272 39841340 40331378 40961384 41981342 42871327 43821373 44501364 45041295 45241199 44591089 43931045 43261023 42191018 41001040 40251084 39941128 39691192 0.05 33358375 33468467 33648495 33928514 34208503 34458479 34808414 35558236 36168090 36518006 36797922 36747855 36517835 36007810 35357819 34847872 34038010 33398218 33358375 0.05 40629477 40889609 41389669 41939665 42549625 43729407 43979311 43899213 43679155 43329119 42969112 42109175 41179300 40719397 40629477 0.05 39180329 40560259 40790164 40730038 40320000 39830003 38690144 38590268 38810325 39180329 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... MRGL 34208503 34458479 34808414 36518006 36797922 36747855 36517835 36007810 35357819 34847872 34038010 33398218 33358375 33468467 33648495 33928514 34208503 MRGL 40560259 40790164 40730038 40320000 39830003 38690144 38590268 38810325 39180329 40560259 MRGL 41939665 42549625 43729407 43979311 43899213 43679155 43329119 42969112 42109175 41179300 40719397 40629477 40889609 41389669 41939665 MRGL 41981342 42861327 43841374 44501364 45041295 45241199 44591089 43931045 43261023 42191018 41001040 40251084 39941128 39691192 39661272 39841340 40331378 40961384 41981342 TSTM 32727911 32937969 32508402 32868673 33348904 34618943 35548903 36268957 36229092 36349242 36499379 37669431 38859435 39479545 38889845 38109982 36590101 34610191 33150250 31040307 30390290 30170208 29770111 29960043 30139978 30139899 29589748 29549467 29059393 99999999 49479714 49049788 48469934 48150055 47080240 46010308 44580257 43330184 42790090 42989924 45179856 45969601 45409169 44568846 43518559 42878491 41608484 40588473 39988395 39798186 39638054 39437945 39067823 38737773 38207725 37817680 37627478 99999999 29278459 30168411 30648339 30928271 31018184 31028132 31018071 31028065 99999999 31001027 33311146 35041253 36051441 37831498 39241538 39951518 40441575 40571685 40771787 40981855 41421924 42201946 42981938 44361942 45971839 48241359 48230968 48090759 48430620 48630518 49310480 && THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 15 SE RMG 25 ENE RMG 70 S TYS 30 NNW GSO 15 NNE DAN 30 W AVC 20 SW AVC 15 NW RWI 15 WSW GSB 15 SE FAY 25 WSW FLO 10 W AGS 45 N MCN 20 SW ATL 30 W ATL 30 S RMG 15 SE RMG THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 40 SSE SNY 20 N IML 30 SSE LBF 30 ENE MCK 35 NNW HLC 50 SSE GLD 35 N LAA 40 SE LIC 20 ESE LIC 40 SSE SNY THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 25 WNW TQE 10 NE SUX 20 ENE FRM 30 W RST 20 E RST 20 SW LSE 40 S LSE 45 NNW DBQ 15 N CID 10 SE OXV 0 - LWD 35 ESE SDA 30 SSW OMA 35 N LNK 25 WNW TQE THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 45 SSE BYI 35 NE BYI 35 NE SUN 45 SSE SMN 25 SW DLN 25 E DLN 15 ESE WEY 25 NNE JAC 35 SE JAC 25 S BPI 40 ESE EVW 45 N PUC 35 NW PUC 40 NE U24 20 NNW U24 35 SW DPG 30 SSE ENV 20 NNE ENV 45 SSE BYI GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 55 ESE CHS 20 E CHS 25 WSW MCN 40 NNE SEM 40 WSW CBM 15 NNE UOX 0 - MKL 20 NNW DYR 0 - ARG 10 NNE FLP 30 SSE UMN 35 NNE JLN 20 SE MKC 30 NNE TOP 20 E RSL 25 NNE DDC 30 S LBL 30 NNW PVW 55 SW LBB 10 NW FST 35 S FST 10 NE 6R6 30 NNW DRT 50 NE DRT 25 S JCT 50 NW SAT 35 ESE BAZ 15 NNE GLS 55 ESE GLS ...CONT... 50 N HCO 45 WNW HCO 30 NW DVL 35 ESE MOT 25 NE DIK 35 NE 2WX 45 NNE RAP 50 SSW PHP 20 WSW VTN 45 NW ONL 20 SSW ABR 30 WNW AXN 40 NNW EAU 15 WNW GRB 45 N GRR 20 WNW LAN 45 NNE FWA 35 SE FWA 15 ENE DAY 10 S ZZV 40 S HLG 30 ESE MGW 25 SSW MRB 40 WSW DCA 45 SSW DCA 35 NE RIC 45 ESE WAL ...CONT... 40 SE AAF 20 SE TLH 10 SW VLD 30 SW AYS 25 WSW SSI 10 SE SSI 45 ESE SSI 50 E SSI ...CONT... 40 S FHU 35 ESE PHX 30 NNW PRC 40 E LAS 30 WNW P38 30 W ELY 50 NNW ELY 25 S EKO 0 - BAM 10 SSW WMC 40 W WMC 70 E AAT 50 E LKV 50 SSW BNO 55 NNW BNO 10 SSW ALW 30 E GPI 20 S HVR 45 W GGW 25 NE GGW 40 NNE OLF 90 NNE OLF