Heat Index Forecast Tables
Issued by NWS
Issued by NWS
645
FMUS23 KWNH 201820
PRBEHL
DAYS 3--7 HEAT INDEX FORECAST TABLES
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1818 UTC THU AUG 20 2026
MINIMUM HEAT INDEX (DEG F) AND MINIMUM HI PROB (%) FRCSTS
AT EASTERN US CITIES - DAYS 3 TO 7 FROM THU AUG 20 2026
AKRON-CANTON_OH ALBANY_NY
CAK 0823 0824 0825 0826 0827 ALB 0823 0824 0825 0826 0827
MIN 59 55 53 57 62 MIN 61 57 54 55 60
%>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 2 %>70 1 1 0 0 1
ASHEVILLE_NC ATLANTA_GA
AVL 0823 0824 0825 0826 0827 ATL 0823 0824 0825 0826 0827
MIN 61 57 59 62 65 MIN 72 69 69 72 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 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 1 1 2
%>75 0 0 0 0 1 %>75 6 8 11 18 29
%>70 1 1 1 5 8 %>70 79 42 45 69 82
BALTIMORE_MD BIRMINGHAM_AL
BWI 0823 0824 0825 0826 0827 BHM 0823 0824 0825 0826 0827
MIN 69 66 64 67 71 MIN 73 70 70 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 0 0
%>85 0 0 0 0 0 %>85 0 0 0 0 1
%>80 0 0 0 0 1 %>80 0 1 2 5 7
%>75 4 1 0 5 16 %>75 16 13 14 28 38
%>70 45 9 6 26 62 %>70 86 50 50 69 81
BOSTON_MA BUFFALO_NY
BOS 0823 0824 0825 0826 0827 BUF 0823 0824 0825 0826 0827
MIN 65 66 60 61 65 MIN 61 56 55 58 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 1 1 0 0 0 %>75 0 0 0 0 0
%>70 12 18 1 1 11 %>70 0 0 0 0 2
CHARLESTON_SC CHARLESTON_WV
CHS 0823 0824 0825 0826 0827 CRW 0823 0824 0825 0826 0827
MIN 76 77 77 77 78 MIN 64 59 57 61 67
%>100 0 0 0 0 0 %>100 0 0 0 0 0
%>95 0 0 1 0 0 %>95 0 0 0 0 0
%>90 1 2 3 2 1 %>90 0 0 0 0 0
%>85 6 10 12 9 9 %>85 0 0 0 0 0
%>80 25 29 31 30 34 %>80 0 0 0 0 0
%>75 60 60 58 61 70 %>75 0 0 0 0 1
%>70 89 86 82 87 93 %>70 0 0 0 4 17
CHARLOTTE_NC CHICAGO_IL
CLT 0823 0824 0825 0826 0827 ORD 0823 0824 0825 0826 0827
MIN 70 66 66 69 71 MIN 62 59 61 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 1 1 %>80 0 0 0 0 0
%>75 8 2 1 10 17 %>75 0 0 0 1 1
%>70 47 17 16 44 63 %>70 2 1 2 13 14
CINCINNATI_OH CLEVELAND_OH
LUK 0823 0824 0825 0826 0827 CLE 0823 0824 0825 0826 0827
MIN 61 57 57 62 66 MIN 61 58 57 61 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 1 2
%>70 0 0 0 5 11 %>70 3 0 1 6 13
COLUMBIA_SC COLUMBUS_OH
CAE 0823 0824 0825 0826 0827 TZR 0823 0824 0825 0826 0827
MIN 73 71 71 72 74 MIN 59 55 55 59 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 2 1 2 3 4 %>80 0 0 0 0 0
%>75 27 14 18 27 39 %>75 0 0 0 0 0
%>70 82 60 58 73 86 %>70 0 0 0 2 4
DAYTON_OH DETROIT_MI
MGY 0823 0824 0825 0826 0827 DET 0823 0824 0825 0826 0827
MIN 59 55 56 61 65 MIN 61 57 59 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 0 %>80 0 0 0 0 0
%>75 0 0 0 0 0 %>75 0 0 0 1 1
%>70 0 0 0 3 7 %>70 0 0 1 10 13
EVANSVILLE_IN GRAND_RAPIDS_MI
EVV 0823 0824 0825 0826 0827 GRR 0823 0824 0825 0826 0827
MIN 64 61 62 66 68 MIN 55 51 53 61 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 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 4 4 %>75 0 0 0 0 0
%>70 3 0 4 21 30 %>70 0 0 0 4 2
GREENSBORO_NC HUNTSVILLE_AL
GSO 0823 0824 0825 0826 0827 HSV 0823 0824 0825 0826 0827
MIN 68 63 63 67 70 MIN 71 67 68 71 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 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 2
%>75 2 0 0 3 9 %>75 7 1 3 18 25
%>70 26 5 4 24 49 %>70 65 21 28 64 79
INDIANAPOLIS_IN KNOXVILLE_TN
IND 0823 0824 0825 0826 0827 TYS 0823 0824 0825 0826 0827
MIN 60 56 57 62 65 MIN 68 63 63 67 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 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 6
%>70 0 0 0 6 8 %>70 17 1 4 22 52
LEXINGTON_KY LOUISVILLE_KY
LEX 0823 0824 0825 0826 0827 SDF 0823 0824 0825 0826 0827
MIN 62 58 58 63 67 MIN 64 60 60 65 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 1 1 %>75 0 0 0 2 3
%>70 1 0 0 9 19 %>70 1 0 1 14 31
MEMPHIS_TN MIAMI_FL
MEM 0823 0824 0825 0826 0827 MIA 0823 0824 0825 0826 0827
MIN 73 71 72 75 74 MIN 85 85 85 87 87
%>100 0 0 0 0 0 %>100 0 0 0 1 2
%>95 0 0 0 0 0 %>95 3 4 5 10 10
%>90 0 0 0 0 0 %>90 24 23 26 32 32
%>85 0 0 1 3 2 %>85 56 53 54 62 61
%>80 5 2 9 17 13 %>80 80 78 78 86 85
%>75 35 18 31 48 45 %>75 95 94 94 97 97
%>70 80 57 64 80 80 %>70 99 99 99 99 99
MILWAUKEE_WI MOBILE_AL
MKE 0823 0824 0825 0826 0827 MOB 0823 0824 0825 0826 0827
MIN 60 59 61 66 65 MIN 77 78 77 77 77
%>100 0 0 0 0 0 %>100 0 0 0 0 0
%>95 0 0 0 0 0 %>95 1 2 1 1 1
%>90 0 0 0 0 0 %>90 3 6 5 4 4
%>85 0 0 0 0 0 %>85 10 17 14 14 14
%>80 0 0 0 0 0 %>80 29 38 34 34 34
%>75 0 0 0 1 1 %>75 59 64 59 60 60
%>70 1 1 2 13 12 %>70 85 85 82 82 83
NASHVILLE_TN NEW_YORK_CITY_NY
BNA 0823 0824 0825 0826 0827 NYC 0823 0824 0825 0826 0827
MIN 69 64 64 69 71 MIN 69 66 64 66 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 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 1 %>80 0 0 0 0 0
%>75 1 0 2 13 15 %>75 2 0 0 1 9
%>70 33 7 15 43 60 %>70 35 15 4 15 47
NORFOLK_VA ORLANDO_FL
ORF 0823 0824 0825 0826 0827 ORL 0823 0824 0825 0826 0827
MIN 74 73 72 74 75 MIN 78 78 78 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 5 2 1 5 12 %>80 31 26 27 28 29
%>75 45 28 26 42 55 %>75 77 75 75 75 76
%>70 86 74 71 82 90 %>70 97 97 97 97 97
PHILADELPHIA_PA PITTSBURGH_PA
PHL 0823 0824 0825 0826 0827 PIT 0823 0824 0825 0826 0827
MIN 68 65 62 64 69 MIN 61 56 55 58 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 0 0 0 0 0 %>80 0 0 0 0 0
%>75 0 0 0 0 6 %>75 0 0 0 0 0
%>70 26 2 1 7 42 %>70 0 0 0 0 2
PORTLAND_ME PROVIDENCE_RI
PWM 0823 0824 0825 0826 0827 PVD 0823 0824 0825 0826 0827
MIN 60 63 57 57 60 MIN 65 65 59 60 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 0 %>80 0 0 0 0 0
%>75 1 1 0 0 0 %>75 2 3 0 0 1
%>70 4 8 2 1 2 %>70 17 17 2 1 12
RALEIGH-DURHAM_NC RICHMOND_VA
RDU 0823 0824 0825 0826 0827 RIC 0823 0824 0825 0826 0827
MIN 71 67 66 69 72 MIN 70 65 64 67 71
%>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 2 %>80 0 0 0 0 1
%>75 11 2 2 9 21 %>75 5 0 0 3 14
%>70 58 20 18 43 70 %>70 44 7 6 25 57
SAVANNAH_GA TALLAHASSEE_FL
SAV 0823 0824 0825 0826 0827 TLH 0823 0824 0825 0826 0827
MIN 76 75 76 76 77 MIN 76 76 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 1 0 0 %>90 0 1 0 0 0
%>85 2 2 5 3 3 %>85 1 4 3 1 3
%>80 15 14 22 18 20 %>80 12 22 20 13 17
%>75 55 52 56 57 64 %>75 59 62 60 55 59
%>70 91 89 87 91 95 %>70 93 91 91 91 91
TAMPA_FL WASHINGTON_DC
TPA 0823 0824 0825 0826 0827 DCA 0823 0824 0825 0826 0827
MIN 81 80 79 79 79 MIN 69 65 64 67 71
%>100 0 0 0 0 0 %>100 0 0 0 0 0
%>95 1 1 1 1 1 %>95 0 0 0 0 0
%>90 8 5 5 4 5 %>90 0 0 0 0 0
%>85 28 22 20 18 18 %>85 0 0 0 0 0
%>80 57 51 47 45 45 %>80 0 0 0 0 1
%>75 81 79 75 74 74 %>75 1 0 0 3 14
%>70 94 94 92 93 92 %>70 40 4 2 23 61
URL IS WWW.WPC.NCEP.NOAA.GOV
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