Day 1 Areal Outline

Issued: 2026-09-18 00:43 UTC

Summary

A marginal risk of severe thunderstorms, including potential tornadoes, hail, and wind, is expected across portions of the central and eastern United States during the day on September 17, 2026. General thunderstorms are also forecasted to occur across a much larger area spanning from the Pacific Northwest through the Mid-Atlantic and Southeast.

Product Text

000 WUUS01 KWNS 180043 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 0741 PM CDT THU SEP 17 2026 VALID TIME 180100Z - 181200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... && ... HAIL ... 0.05 40111125 40111170 40161228 40521275 41191333 42261388 43311424 44531479 44941496 45521509 46021482 46161460 46241427 46051377 45691327 44781236 43701159 42621098 41741076 40941078 40111125 && ... WIND ... 0.05 41081134 40941178 40911228 41131297 41541335 42151352 43151396 43921421 44421415 44611380 44671327 44451261 44001211 43281167 42431120 41791098 41541101 41081134 0.05 40470153 40770233 40990305 41210355 41600366 41900335 42100269 42010164 41880084 41520040 41210029 40830040 40550084 40470153 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... MRGL 41900335 42100269 42010164 41880084 41520040 41210029 40830040 40550084 40470153 41210355 41600366 41900335 MRGL 46021482 46161460 46241427 46051377 45691327 44781236 43701159 42621098 41741076 40941078 40111125 40161228 40521275 41191333 42261388 43311424 44941496 45521509 46021482 TSTM 30971087 32801069 34291053 34811082 35111131 35851265 36491347 37251435 38251476 39271469 41211461 43001499 43621541 44031572 44141628 43931673 43391717 43051766 41541917 40502039 39682171 39532230 39612286 39872315 40192339 41302302 41812278 43502174 44982112 46172051 47251920 48071759 48561585 48611454 48521348 47881195 47041090 45760993 43240779 42320747 41280733 40370721 39820714 39320689 39160653 39150601 39330572 39700552 40310561 41700580 43280578 44550507 45630384 46080314 46750272 47530312 48000368 48460432 48870458 49300473 99999999 28990108 28969886 29079629 29119423 99999999 49389997 48350032 47720057 47240096 46610090 46340038 46199943 45999794 45589613 45089458 44509346 43649251 42159154 41029080 40509035 40158971 40158914 40428855 40758791 41158706 41298596 41318434 40958292 40718180 40478060 40397954 40457841 40657727 40887627 40807540 40497508 39987496 39047514 37547712 36687945 36338061 36348165 36458226 36718277 37018337 37558474 38298780 38138915 37539033 36269164 35629271 35459354 35509432 35779483 36329489 36889452 37409389 38369290 39239235 39999245 40759342 41079468 41139644 40839773 39959912 38950093 38550161 37830271 36830333 35870353 34700379 33610419 32180488 30830523 30240529 99999999 27338399 27258305 27598237 28148211 28918198 29638159 30308132 30738084 && THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 15 E BFF 0 - AIA 30 W MHN 15 SE MHN 30 NNE LBF 20 ENE LBF 25 SE LBF 30 NNW MCK 0 - IML 30 WNW SNY 20 S BFF 15 E BFF THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 40 ESE P69 60 SSW MSO 50 S MSO 50 SW 3DU 40 WSW BTM 15 N MQM 25 ENE IDA 45 W BPI 35 NNE EVW 25 SSE EVW 45 NW PUC 35 E DPG 25 NNE DPG 50 NE ENV 20 SSW BYI 15 SSE SUN 55 WSW SMN 50 SSE P69 40 ESE P69 GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 55 SW FHU 50 NNE TUS 30 W SOW 15 SSW INW 20 E FLG 30 WSW GCN 40 S SGU 25 SSE P38 45 NNW P38 10 E ELY 45 NW ENV 45 NW TWF 40 E BOI 40 NE BOI 40 N BOI 35 NW BOI 50 WSW BOI 35 NNE REO 75 SE LKV 70 S AAT 45 SE RBL 45 S RBL 40 NNE UKI 50 N UKI 55 SE EKA 35 W MHS 40 S MFR 60 SSW RDM 45 S DLS 30 S YKM 15 ESE EPH 30 N GEG 70 NNW 3TH 25 NNW GPI 40 ENE GPI 40 NW GTF 40 SE GTF 25 E LVM 35 ENE RIW 40 NNW RWL 35 S RWL 20 ESE CAG 15 NW EGE 0 - ASE 20 ESE ASE 45 E ASE 55 SW DEN 35 W DEN 35 WSW FCL 25 NNW LAR 40 NNW DGW 25 ENE GCC 15 WNW 2WX 40 NNE 2WX 0 - DIK 55 NNW DIK 15 S ISN 35 WNW ISN 65 NW ISN 90 NNE OLF ...CONT... 30 SSW DRT 35 SE HDO 25 N PSX 35 ESE GLS ...CONT... 100 NNW DVL 45 E MOT 40 E N60 35 NNW BIS 15 SSW BIS 35 SSE BIS 60 SW JMS 45 NNE ABR 25 NE VVV 40 SW STC 30 SSW MSP 20 S RST 20 NNE CID 25 NE BRL 35 WSW PIA 20 N SPI 25 SSW BMI 20 E BMI 40 NNW DNV 20 S VPZ 35 SSE SBN 35 WSW TOL 25 WNW MFD 25 SW CAK 20 N HLG 10 NW LBE 10 NNW AOO 35 NW CXY 40 SW AVP 10 N ABE 20 NW TTN 15 ENE PHL 20 ESE DOV 10 ENE RIC 10 NW DAN 40 WNW GSO 45 NNW HKY 10 E TRI 25 NW TRI 35 S JKL 35 SSW LEX 25 NW EVV 20 SW MVN 15 SSE FAM 35 N BVX 35 NE RUE 30 WNW RUE 10 NNE FSM 30 ENE MKO 20 SSW GMJ 20 S JLN 35 N UMN 45 SE SZL 30 NNW COU 10 SE IRK 30 ENE LWD 45 ENE SDA 25 NE LNK 30 ESE GRI 55 S EAR 50 SE GLD 55 S GLD 15 S LAA 30 NNW CAO 45 SSW CAO 35 SSW TCC 30 NE ROW 25 N GDP 75 SSW GDP 75 W MRF ...CONT... 90 WSW PIE 30 WSW SRQ 15 NE SRQ 40 ENE PIE 25 SE OCF 30 SSW SGJ 25 N SGJ 45 SE SSI