Day 1 Areal Outline

Issued: 2026-08-18 17:14 UTC

Summary

Severe thunderstorms capable of producing large hail, damaging winds, and a slight risk of tornadoes are forecast across portions of the central and southern United States on Tuesday. These weather hazards are expected to affect a wide range of areas from the Great Plains and Midwest through the Gulf Coast and Southeast throughout the day.

Product Text

000 WUUS01 KWNS 181714 PTSDY1 DAY 1 CONVECTIVE OUTLOOK AREAL OUTLINE NWS STORM PREDICTION CENTER NORMAN OK 1212 PM CDT TUE AUG 18 2026 VALID TIME 181630Z - 191200Z PROBABILISTIC OUTLOOK POINTS DAY 1 ... TORNADO ... 0.02 39049953 39400126 39820180 40390155 40660113 40740037 40759989 40759896 40259657 39759500 39559470 39129426 38689426 38409448 38059487 37969541 38179659 38659835 39049953 && ... HAIL ... 0.05 41419688 40529500 40159352 39739210 38999141 38259140 37829167 37459255 37229289 37099357 37629581 37739946 38210276 38730419 40460555 41590660 44930955 46141071 47021114 47631102 47911071 48201020 48370942 48280846 47940755 47040643 45540486 45040376 44650226 44380014 44129968 43829903 43239828 42229751 41419688 0.05 44878503 44428466 44138495 43628573 43118709 42458820 42038979 42039000 42039200 42019388 42779635 43449675 43959651 44299351 44259182 44359004 44628888 45598709 45518601 44878503 0.15 39489829 39999812 40149741 40179692 40179632 39839510 39139371 38429361 38119421 38179542 38309671 38529758 39489829 0.15 42999518 43459515 43599318 43929162 43979046 43918876 42998857 42669024 42589241 42709452 42999518 0.15 39160336 39780347 40530310 41680185 41660102 41500056 40870002 39880027 39010124 38820229 39160336 CIG1 38859946 38590129 38520219 39140348 39890355 41060354 42460215 42520082 41779973 40889875 40399727 39789495 39279508 39059617 39229857 38859946 CIG1 43529583 43809337 44069195 44248968 44248864 44038811 43208785 42778824 42358931 42129025 42139198 42079397 42569545 42819599 43529583 && ... WIND ... 0.05 37589841 37759957 37980210 38750379 40610568 41070620 41850859 43160923 43601000 43521075 43831160 45001258 46051276 46871222 47601163 47991104 48181022 48350930 48290850 47940753 47090648 45500482 45030374 44650226 44390010 44219671 44189229 44199071 44878754 45588573 46068422 46128314 45648199 44928174 44198193 43368253 42848349 42258481 41758575 41228734 39808885 38208902 37298979 36609076 36609177 37059379 37189497 37589841 0.05 33179076 33719052 34178989 34188900 34008823 33638719 33128677 32698662 32148645 31068550 30708372 30768211 30598145 30648142 29978136 29328114 29518274 30018500 30448667 30178811 30358908 31008975 32309045 33179076 0.15 38479757 38979784 39809785 40119741 40129681 40009603 39679433 39249249 38769206 38429206 37999250 37719356 37819448 38219684 38479757 0.15 43868881 43268765 42548780 42588949 42639101 43289114 43709069 43868881 0.15 39380266 40910233 41300047 40719986 39729992 39090047 38960159 39380266 CIG1 39679492 39419455 39109429 38699429 38209464 38009526 38079583 38339732 38380056 38500194 38830384 40470547 41250629 41790816 43230927 43831033 44101106 44741158 45521183 45831182 46211142 46741086 47011014 47130900 47080776 46410587 45470484 44630316 43790194 42600031 41779881 40849723 40419647 40059585 39679492 && CATEGORICAL OUTLOOK POINTS DAY 1 ... CATEGORICAL ... SLGT 39999812 40149741 40179632 39819507 39249249 38769206 38429206 37999250 37719356 38219684 38479757 39489829 39999812 SLGT 40530310 41680185 41660102 41500056 40719986 39729992 39090047 38820229 39160336 39780347 40530310 SLGT 43459515 43599318 43929162 43979046 43918876 43838874 43268765 42548780 42639101 42589241 42709452 42999518 43459515 MRGL 33719052 34178989 34188900 34008823 33638719 33128677 32148645 31068550 30708372 30768211 30598145 30648142 29978136 29328114 29518274 30448667 30178811 30358908 31008975 32309045 33179076 33719052 MRGL 44198193 43368253 41758575 41228734 39808885 38208902 37298979 36609076 36609177 37059379 37769964 37980210 38730419 40460555 41070620 41850859 43160923 43601000 43521075 43831160 45001258 46051276 47601163 47991104 48370942 48290850 47940753 47090648 45540486 45040376 44650226 44390010 44219671 44199436 44299351 44259182 44359004 44628888 45598709 45498597 46068422 46128314 TSTM 26047946 26758101 27148272 27198333 99999999 43657983 42627922 41418018 40638132 40548276 40298540 39248695 38928761 38088847 36758946 35939056 36189225 36679408 36759592 36709755 36919934 36950147 36280293 35180323 33500511 33000678 32310806 31820823 31250778 99999999 31611342 32771240 33331242 33951266 34781289 35431231 35721090 36100902 36690727 36960584 37190539 37770578 38160582 38900608 39180681 39010837 38960873 38481061 38721132 39051143 39601134 40501157 42851200 44081229 44831314 45421374 46101422 47741451 49831499 99999999 33317751 37347986 37997964 38327883 38217797 37897632 37737456 37757413 99999999 28558997 30219208 31439329 33249370 34579264 34659110 34818984 34308805 33628656 33418614 32528479 31758338 31518154 31077937 99999999 50060450 48460359 47220338 46450273 45890100 45739884 46059584 45539105 46118957 46978636 47748518 48278454 && THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 40 NW CNK 45 NNE CNK 25 ESE BIE 10 WNW STJ 30 NNW COU 10 ESE COU 15 SSE JEF 25 NW TBN 35 NNW SGF 35 WSW EMP 25 S SLN 35 W CNK 40 NW CNK THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 25 NNE AKO 50 WSW MHN 25 S MHN 25 NNE LBF 50 SSW BBW 25 NNW HLC 40 WSW HLC 30 S ITR 20 ESE LIC 30 SSW AKO 25 NNE AKO THERE IS A SLIGHT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 20 N SPW 30 NNE MCW 20 W LSE 10 WNW VOK 10 WSW OSH 15 SW OSH 25 NNE MKE 15 S RAC 20 NW DBQ 0 - ALO 20 WNW FOD 15 S SPW 20 N SPW THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 30 WNW GWO 25 SW UOX 15 WSW TUP 30 NNE CBM 25 W BHM 30 S BHM 10 SSW MGM 20 S DHN 25 S MGR 30 NW JAX 15 ENE JAX 20 ENE JAX 0 - SGJ 10 NNW DAB 25 ESE CTY 25 SSW CEW 35 SSE MOB 0 - GPT 40 SW PIB 20 W JAN 25 SSE GLH 30 WNW GWO THERE IS A MARGINAL RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 60 ENE BAX 35 SE BAX 35 SSW AZO 25 SW VPZ 0 - DEC 10 SW MVN 15 WNW CGI 20 SW POF 10 SSE UNO 15 NNE UMN 20 E DDC 30 E LAA 30 ESE COS 30 W FCL 35 WSW LAR 30 NE RKS 35 NW LND 35 E JAC 0 - JAC 30 NE IDA 15 S DLN 15 WNW BTM 15 NW GTF 40 NNE GTF 20 SE HVR 60 ESE HVR 45 WSW GGW 55 NNW MLS 25 ENE 4BQ 40 SSW 2WX 55 NW PHP 10 E PIR 10 SE BKX 20 W MKT 20 ENE MKT 40 NW LSE 30 NNE VOK 45 NNW OSH 10 S ESC 55 NNW TVC 30 SSE ANJ 75 NNE APN GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 55 ENE MIA 55 ENE FMY 20 SSW SRQ 50 WSW SRQ ...CONT... 75 NW BUF 30 N JHW 15 W FKL 20 SSE CAK 25 SSW MFD 0 - MIE 20 WNW BMG 40 SSW HUF 25 SE MVN 35 S CGI 10 NE JBR 10 E FLP 20 SW UMN 0 - BVO 25 W PNC 40 WNW AVK 20 N GUY 15 SE CAO 20 E TCC 25 E SRR 30 ESE TCS 25 SSE SVC 40 SW DMN 70 S DMN ...CONT... 100 SSW GBN 20 ESE GBN 25 WSW PHX 50 SSW PRC 30 WNW PRC 35 SSW GCN 50 NNW INW 40 NNW GUP 40 SE DRO 30 S ALS 30 ESE ALS 25 NNE ALS 50 N ALS 50 ESE ASE 0 - ASE 10 SE GJT 15 SW GJT 0 - 4HV 40 WNW 4HV 55 SW PUC 30 W PUC 30 SE SLC 30 E PIH 35 S MQM 40 SW DLN 20 NNE SMN 55 S MSO 40 SSW GPI 110 NNW GPI ...CONT... 70 SSE ILM 0 - ROA 40 ENE SSU 0 - SHD 25 ENE CHO 25 SSE NHK 50 ESE WAL 75 E WAL ...CONT... 65 SSW BVE 0 - LFT 25 SSW IER 25 SE TXK 25 WSW LIT 60 NE PBF 20 SSE MEM 40 SW MSL 10 ENE BHM 20 SW ANB 10 E CSG 50 NNE MGR 25 NNW SSI 130 SSE CHS ...CONT... 135 NNW ISN 20 N ISN 40 NW DIK 25 S DIK 35 NW MBG 30 NW ABR 25 WNW AXN 50 NNE EAU 35 N RHI 65 ENE MQT 95 NNW ANJ 125 N ANJ