FMUS23 KWNH 200653 PRBEHI DAYS 3--7 HEAT INDEX FORECAST TABLES NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 0652 UTC WED MAY 20 2026 MEAN HEAT INDEX (DEG F) AND MEAN HI PROB (%) FRCSTS AT EASTERN US CITIES - DAYS 3 TO 7 FROM WED MAY 20 2026 AKRON-CANTON_OH ALBANY_NY CAK 0523 0524 0525 0526 0527 ALB 0523 0524 0525 0526 0527 MEAN 64 71 70 71 74 MEAN 53 54 60 65 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 1 2 %>90 0 0 0 0 0 %>85 0 0 0 3 8 %>85 0 0 0 0 0 %>80 1 5 4 12 21 %>80 0 0 0 0 1 %>75 5 21 18 31 43 %>75 0 0 1 4 7 %>70 19 55 48 57 67 %>70 0 0 5 19 26 ASHEVILLE_NC ATLANTA_GA AVL 0523 0524 0525 0526 0527 ATL 0523 0524 0525 0526 0527 MEAN 68 70 71 71 71 MEAN 78 79 79 78 78 %>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 4 3 3 4 4 %>80 1 1 1 2 3 %>80 32 36 34 32 30 %>75 6 11 12 18 19 %>75 81 88 84 79 74 %>70 34 52 58 64 59 %>70 99 100 99 98 97 BALTIMORE_MD BIRMINGHAM_AL BWI 0523 0524 0525 0526 0527 BHM 0523 0524 0525 0526 0527 MEAN 56 62 69 73 74 MEAN 78 79 78 78 79 %>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 1 2 3 %>85 4 6 7 6 6 %>80 0 0 6 12 16 %>80 30 38 36 35 37 %>75 0 2 21 36 43 %>75 76 85 78 79 80 %>70 0 11 47 69 74 %>70 97 99 97 98 98 BOSTON_MA BUFFALO_NY BOS 0523 0524 0525 0526 0527 BUF 0523 0524 0525 0526 0527 MEAN 53 52 56 61 62 MEAN 54 61 63 64 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 1 %>80 0 0 0 0 1 %>75 0 0 0 2 3 %>75 0 0 0 1 5 %>70 0 0 1 9 13 %>70 0 4 4 11 22 CHARLESTON_SC CHARLESTON_WV CHS 0523 0524 0525 0526 0527 CRW 0523 0524 0525 0526 0527 MEAN 85 85 84 84 84 MEAN 72 75 75 75 76 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 2 2 0 0 1 %>95 0 0 0 0 0 %>90 15 14 4 5 10 %>90 0 0 0 1 1 %>85 47 47 36 39 39 %>85 1 3 3 4 7 %>80 83 84 85 87 77 %>80 7 18 17 19 24 %>75 98 98 99 100 96 %>75 28 52 47 48 54 %>70 100 100 100 100 100 %>70 62 85 79 79 81 CHARLOTTE_NC CHICAGO_IL CLT 0523 0524 0525 0526 0527 ORD 0523 0524 0525 0526 0527 MEAN 74 76 77 78 77 MEAN 62 65 67 70 73 %>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 1 %>90 0 0 0 0 2 %>85 1 2 4 3 7 %>85 0 0 0 2 7 %>80 11 19 27 31 30 %>80 0 1 2 9 19%>75 43 60 71 80 68 %>75 1 6 11 25 39 %>70 80 91 96 98 93 %>70 9 22 33 51 63 CINCINNATI_OH CLEVELAND_OH LUK 0523 0524 0525 0526 0527 CLE 0523 0524 0525 0526 0527 MEAN 74 74 74 75 77 MEAN 66 70 70 72 74 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 1 %>95 0 0 0 0 2 %>90 0 0 0 1 4 %>90 0 0 0 2 5 %>85 0 2 3 7 14 %>85 0 2 1 6 12 %>80 4 12 14 22 34 %>80 2 7 7 16 25 %>75 35 43 43 50 61 %>75 9 23 21 34 44 %>70 86 79 76 77 84 %>70 27 51 48 57 65 COLUMBIA_SC COLUMBUS_OH CAE 0523 0524 0525 0526 0527 TZR 0523 0524 0525 0526 0527 MEAN 82 82 82 82 81 MEAN 71 73 72 74 76 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 1 0 0 0 0 %>95 0 0 0 0 1 %>90 6 2 2 3 3 %>90 0 0 0 1 3 %>85 28 22 21 25 21 %>85 0 1 1 5 11 %>80 67 70 70 70 60 %>80 1 7 9 18 29 %>75 93 97 97 96 91 %>75 13 34 32 42 54 %>70 99 100 100 100 99 %>70 59 75 67 70 78 DAYTON_OH DETROIT_MI MGY 0523 0524 0525 0526 0527 DET 0523 0524 0525 0526 0527 MEAN 72 74 73 74 77 MEAN 61 66 67 69 72 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 1 %>95 0 0 0 0 0 %>90 0 0 0 1 5 %>90 0 0 0 0 1 %>85 0 2 3 7 15 %>85 0 0 0 1 4 %>80 2 11 14 22 35 %>80 0 0 1 4 13 %>75 23 39 40 47 60 %>75 1 4 6 16 32 %>70 76 75 72 73 81 %>70 8 20 27 43 58 EVANSVILLE_IN GRAND_RAPIDS_MI EVV 0523 0524 0525 0526 0527 GRR 0523 0524 0525 0526 0527 MEAN 75 75 76 77 79 MEAN 60 63 66 70 73 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 1 %>95 0 0 0 0 0 %>90 0 0 1 2 5 %>90 0 0 0 0 1 %>85 1 3 5 10 19 %>85 0 0 0 1 5 %>80 9 18 22 32 45 %>80 0 0 1 6 16 %>75 47 51 54 63 74 %>75 0 2 7 21 38 %>70 88 83 83 88 92 %>70 4 11 26 48 64 GREENSBORO_NC HUNTSVILLE_AL GSO 0523 0524 0525 0526 0527 HSV 0523 0524 0525 0526 0527 MEAN 68 73 76 77 76 MEAN 76 77 77 77 77 %>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 1 %>90 0 0 0 0 0 %>85 0 1 3 3 5 %>85 2 1 2 2 3 %>80 1 9 18 22 22 %>80 18 18 21 21 26 %>75 10 34 54 65 55 %>75 63 68 67 67 73 %>70 34 69 87 94 85 %>70 94 97 95 96 97 INDIANAPOLIS_IN KNOXVILLE_TN IND 0523 0524 0525 0526 0527 TYS 0523 0524 0525 0526 0527 MEAN 71 72 72 74 77 MEAN 76 77 77 76 77 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 1 %>95 0 0 0 0 0 %>90 0 0 0 1 3 %>90 1 1 1 0 1 %>85 0 1 1 5 12 %>85 5 5 6 4 6 %>80 1 7 8 18 32 %>80 21 25 27 23 25 %>75 13 29 29 44 59 %>75 55 63 64 62 62 %>70 56 63 63 73 83 %>70 86 91 91 91 89LEXINGTON_KY LOUISVILLE_KY LEX 0523 0524 0525 0526 0527 SDF 0523 0524 0525 0526 0527 MEAN 74 74 74 75 76 MEAN 76 76 76 77 79 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 0 0 0 0 1 %>90 0 0 0 0 1 %>90 0 0 1 2 6 %>85 0 0 1 3 6 %>85 1 4 7 11 19 %>80 2 6 8 15 24 %>80 15 21 25 31 43 %>75 33 38 40 46 56 %>75 56 54 56 61 70 %>70 88 83 82 80 85 %>70 91 85 84 85 89 MEMPHIS_TN MIAMI_FL MEM 0523 0524 0525 0526 0527 MIA 0523 0524 0525 0526 0527 MEAN 78 77 77 78 80 MEAN 91 90 90 90 90 %>100 0 0 0 0 0 %>100 4 2 1 2 2 %>95 0 0 0 0 0 %>95 18 13 10 13 15 %>90 0 0 0 0 2 %>90 53 49 45 49 50 %>85 4 3 3 5 14 %>85 88 89 88 89 87 %>80 31 22 25 30 49 %>80 99 99 99 99 99 %>75 78 64 69 74 85 %>75 100 100 100 100 100 %>70 98 93 95 96 98 %>70 100 100 100 100 100 MILWAUKEE_WI MOBILE_AL MKE 0523 0524 0525 0526 0527 MOB 0523 0524 0525 0526 0527 MEAN 55 59 62 64 66 MEAN 84 85 84 83 84 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 0 0 0 %>95 1 2 1 0 0 %>90 0 0 0 0 0 %>90 12 16 12 7 7 %>85 0 0 0 0 1 %>85 45 52 42 35 38 %>80 0 0 0 1 4 %>80 82 85 79 77 81 %>75 0 0 1 6 12 %>75 98 98 96 97 98 %>70 0 2 7 19 29 %>70 100 100 100 100 100 NASHVILLE_TN NEW_YORK_CITY_NY BNA 0523 0524 0525 0526 0527 NYC 0523 0524 0525 0526 0527 MEAN 76 76 77 77 79 MEAN 53 57 63 68 70 %>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 1 1 %>90 0 0 0 0 0 %>85 2 2 4 6 10 %>85 0 0 0 0 1 %>80 18 17 24 29 38 %>80 0 0 0 2 5 %>75 64 61 64 67 76 %>75 0 0 3 10 20 %>70 95 93 93 93 96 %>70 0 0 14 34 48 NORFOLK_VA ORLANDO_FL ORF 0523 0524 0525 0526 0527 ORL 0523 0524 0525 0526 0527 MEAN 72 76 78 78 77 MEAN 88 88 87 88 88 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 0 0 1 1 1 %>95 4 3 1 2 5 %>90 0 2 5 4 4 %>90 33 30 22 26 31 %>85 2 9 15 15 12 %>85 84 81 78 78 76 %>80 10 26 37 38 30 %>80 99 99 99 99 97 %>75 30 55 66 69 58 %>75 100 100 100 100 100 %>70 65 84 88 91 84 %>70 100 100 100 100 100 PHILADELPHIA_PA PITTSBURGH_PA PHL 0523 0524 0525 0526 0527 PIT 0523 0524 0525 0526 0527 MEAN 53 58 66 70 71 MEAN 61 70 71 72 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 1 2 %>85 0 0 0 1 1 %>85 0 1 1 4 8 %>80 0 0 2 5 7 %>80 0 7 6 15 21 %>75 0 0 10 20 27 %>75 2 24 24 36 43 %>70 0 3 29 52 60 %>70 11 52 55 62 68 PORTLAND_ME PROVIDENCE_RI PWM 0523 0524 0525 0526 0527 PVD 0523 0524 0525 0526 0527 MEAN 52 49 51 56 58 MEAN 53 53 59 63 65 %>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 2 4 %>70 0 0 0 1 2 %>70 0 0 2 11 17 RALEIGH-DURHAM_NC RICHMOND_VA RDU 0523 0524 0525 0526 0527 RIC 0523 0524 0525 0526 0527 MEAN 75 77 79 80 79 MEAN 65 72 77 78 77 %>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 1 2 1 3 %>90 0 1 2 2 3 %>85 3 8 12 14 14 %>85 0 3 10 12 11 %>80 17 30 44 52 41 %>80 1 13 30 38 32 %>75 48 65 80 88 73 %>75 4 32 60 70 61 %>70 80 90 97 99 93 %>70 19 59 84 91 84 SAVANNAH_GA TALLAHASSEE_FL SAV 0523 0524 0525 0526 0527 TLH 0523 0524 0525 0526 0527 MEAN 86 86 85 85 84 MEAN 86 87 86 85 86 %>100 0 0 0 0 0 %>100 0 0 0 0 0 %>95 3 2 0 0 1 %>95 2 3 2 3 3 %>90 21 15 6 6 10 %>90 19 23 17 18 18 %>85 59 56 46 45 45 %>85 63 66 58 53 55 %>80 90 91 91 91 85 %>80 94 94 92 86 88 %>75 99 99 100 100 99 %>75 100 100 99 98 99 %>70 100 100 100 100 100 %>70 100 100 100 100 100 TAMPA_FL WASHINGTON_DC TPA 0523 0524 0525 0526 0527 DCA 0523 0524 0525 0526 0527 MEAN 91 90 89 89 89 MEAN 57 64 72 74 75 %>100 4 3 1 1 1 %>100 0 0 0 0 0 %>95 20 18 11 12 10 %>95 0 0 0 0 0 %>90 54 52 44 45 40 %>90 0 0 0 1 1 %>85 85 85 83 82 78 %>85 0 0 3 4 5 %>80 98 98 98 98 97 %>80 0 1 12 18 20 %>75 100 100 100 100 100 %>75 0 6 31 45 48 %>70 100 100 100 100 100 %>70 0 19 59 74 77 URL IS WWW.WPC.NCEP.NOAA.GOV $$