FMUS23 KWNH 181823 PRBEHL DAYS 3--7 HEAT INDEX FORECAST TABLES NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 1821 UTC MON MAY 18 2026 MINIMUM HEAT INDEX (DEG F) AND MINIMUM HI PROB (%) FRCSTS AT EASTERN US CITIES - DAYS 3 TO 7 FROM MON MAY 18 2026 AKRON-CANTON_OH ALBANY_NY CAK 0521 0522 0523 0524 0525 ALB 0521 0522 0523 0524 0525 MIN 42 48 57 60 61 MIN 44 42 45 47 49 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 1 %>75 0 0 0 0 0 %>70 0 0 0 4 5 %>70 0 0 0 0 0 ASHEVILLE_NC ATLANTA_GA AVL 0521 0522 0523 0524 0525 ATL 0521 0522 0523 0524 0525 MIN 63 59 59 61 62 MIN 68 68 68 68 68 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 0 %>75 2 2 3 3 6 %>70 1 0 0 1 2 %>70 29 26 27 31 35 BALTIMORE_MD BIRMINGHAM_AL BWI 0521 0522 0523 0524 0525 BHM 0521 0522 0523 0524 0525 MIN 57 52 53 58 60 MIN 67 68 68 68 68 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 1 1 %>75 0 0 0 1 1 %>75 3 4 5 7 8 %>70 0 0 0 5 6 %>70 24 31 33 34 36 BOSTON_MA BUFFALO_NY BOS 0521 0522 0523 0524 0525 BUF 0521 0522 0523 0524 0525 MIN 51 46 47 47 48 MIN 38 41 49 51 53 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 0 %>75 0 0 0 0 0 %>70 0 0 0 0 0 %>70 0 0 0 0 0 CHARLESTON_SC CHARLESTON_WV CHS 0521 0522 0523 0524 0525 CRW 0521 0522 0523 0524 0525 MIN 72 73 74 74 73 MIN 53 58 62 63 64 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 1 3 %>80 0 0 0 0 0 %>75 7 19 34 40 34 %>75 0 0 0 0 0 %>70 80 91 91 91 82 %>70 0 0 2 4 5 CHARLOTTE_NC CHICAGO_IL CLT 0521 0522 0523 0524 0525 ORD 0521 0522 0523 0524 0525 MIN 68 62 63 65 66 MIN 42 46 51 55 58 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 1 0 0 0 1 %>80 0 0 0 00 %>75 8 1 2 4 6 %>75 0 0 0 0 0 %>70 32 8 11 20 26 %>70 0 0 0 0 2 CINCINNATI_OH CLEVELAND_OH LUK 0521 0522 0523 0524 0525 CLE 0521 0522 0523 0524 0525 MIN 49 55 64 64 65 MIN 44 49 58 61 62 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 1 %>75 0 0 0 1 1 %>70 0 0 6 9 11 %>70 0 0 1 6 9 COLUMBIA_SC COLUMBUS_OH CAE 0521 0522 0523 0524 0525 TZR 0521 0522 0523 0524 0525 MIN 69 68 69 69 69 MIN 45 52 62 63 63 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 1 0 0 1 1 %>80 0 0 0 0 0 %>75 9 7 5 10 11 %>75 0 0 0 1 1 %>70 42 35 36 44 43 %>70 0 0 3 7 8 DAYTON_OH DETROIT_MI MGY 0521 0522 0523 0524 0525 DET 0521 0522 0523 0524 0525 MIN 47 53 63 64 65 MIN 39 46 54 56 58 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 1 1 %>75 0 0 0 0 0 %>70 0 0 6 9 12 %>70 0 0 0 0 1 EVANSVILLE_IN GRAND_RAPIDS_MI EVV 0521 0522 0523 0524 0525 GRR 0521 0522 0523 0524 0525 MIN 57 60 65 66 67 MIN 39 41 50 53 55 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 2 1 2 %>75 0 0 0 0 0 %>70 0 1 15 16 24 %>70 0 0 0 0 1 GREENSBORO_NC HUNTSVILLE_AL GSO 0521 0522 0523 0524 0525 HSV 0521 0522 0523 0524 0525 MIN 66 56 60 64 65 MIN 66 67 67 67 67 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 1 0 0 0 1 %>80 0 0 0 0 0 %>75 6 0 1 2 4 %>75 0 1 2 2 3 %>70 25 1 5 13 19 %>70 11 17 20 19 23 INDIANAPOLIS_IN KNOXVILLE_TN IND 0521 0522 0523 0524 0525 TYS 0521 0522 0523 0524 0525 MIN 48 52 62 63 65 MIN 66 66 66 66 66 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 1 1 %>75 0 0 0 0 0 %>70 0 0 6 8 13 %>70 6 4 9 99 LEXINGTON_KY LOUISVILLE_KY LEX 0521 0522 0523 0524 0525 SDF 0521 0522 0523 0524 0525 MIN 54 58 64 64 64 MIN 56 59 66 66 67 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 1 %>75 0 0 0 1 1 %>70 0 0 5 7 9 %>70 0 0 9 16 21 MEMPHIS_TN MIAMI_FL MEM 0521 0522 0523 0524 0525 MIA 0521 0522 0523 0524 0525 MIN 66 67 68 68 69 MIN 80 81 82 83 83 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 1 1 2 2 %>90 0 0 0 0 0 %>90 3 5 8 10 11 %>85 0 0 0 0 0 %>85 17 22 29 33 35 %>80 0 0 0 0 0 %>80 48 54 62 70 71 %>75 0 1 1 2 2 %>75 89 90 93 94 94 %>70 13 23 25 31 38 %>70 99 99 100 100 99 MILWAUKEE_WI MOBILE_AL MKE 0521 0522 0523 0524 0525 MOB 0521 0522 0523 0524 0525 MIN 39 42 46 49 52 MIN 72 73 74 74 74 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 1 2 2 4 %>75 0 0 0 0 0 %>75 14 28 40 39 43 %>70 0 0 0 0 0 %>70 73 90 95 93 92 NASHVILLE_TN NEW_YORK_CITY_NY BNA 0521 0522 0523 0524 0525 NYC 0521 0522 0523 0524 0525 MIN 64 65 66 66 67 MIN 56 51 50 53 56 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 1 1 2 %>75 0 0 0 0 0 %>70 7 8 13 16 21 %>70 0 0 0 0 0 NORFOLK_VA ORLANDO_FL ORF 0521 0522 0523 0524 0525 ORL 0521 0522 0523 0524 0525 MIN 68 61 64 65 66 MIN 74 75 76 76 76 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 1 0 %>80 0 0 1 3 2 %>75 2 0 0 5 5 %>75 16 43 70 79 78 %>70 32 0 6 21 24 %>70 99 100 100 100 100 PHILADELPHIA_PA PITTSBURGH_PA PHL 0521 0522 0523 0524 0525 PIT 0521 0522 0523 0524 0525 MIN 55 50 50 54 57 MIN 45 51 56 61 62 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 0 %>75 0 0 0 0 0 %>70 0 0 0 2 2 %>70 0 0 0 4 5 PORTLAND_ME PROVIDENCE_RI PWM 0521 0522 0523 0524 0525 PVD 0521 0522 0523 0524 0525MIN 45 41 43 43 44 MIN 52 45 46 48 49 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 0 %>80 0 0 0 0 0 %>75 0 0 0 0 0 %>75 0 0 0 0 0 %>70 0 0 0 0 0 %>70 0 0 0 0 0 RALEIGH-DURHAM_NC RICHMOND_VA RDU 0521 0522 0523 0524 0525 RIC 0521 0522 0523 0524 0525 MIN 69 60 64 67 68 MIN 63 54 57 63 64 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 0 1 %>80 0 0 0 1 1 %>75 7 0 1 5 9 %>75 2 0 0 5 6 %>70 39 2 12 27 33 %>70 13 0 2 16 19 SAVANNAH_GA TALLAHASSEE_FL SAV 0521 0522 0523 0524 0525 TLH 0521 0522 0523 0524 0525 MIN 71 73 74 74 74 MIN 71 72 73 74 74 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 0 0 0 %>85 0 0 0 0 0 %>80 0 0 0 2 3 %>80 0 0 0 1 2 %>75 9 27 37 41 38 %>75 9 13 19 33 36 %>70 71 90 92 90 84 %>70 72 84 87 94 91 TAMPA_FL WASHINGTON_DC TPA 0521 0522 0523 0524 0525 DCA 0521 0522 0523 0524 0525 MIN 76 77 78 78 78 MIN 58 53 54 59 61 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 0 %>90 0 0 0 0 0 %>90 0 0 0 0 0 %>85 0 0 2 4 2 %>85 0 0 0 0 0 %>80 8 15 28 31 25 %>80 0 0 0 0 0 %>75 64 77 84 83 80 %>75 0 0 0 2 2 %>70 98 99 100 100 99 %>70 0 0 0 7 9 URL IS WWW.WPC.NCEP.NOAA.GOV $$