HPC wrote:STORM SUMMARY NUMBER 07 FOR HIGH HEAT INDICES
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
500 AM EDT THU JUL 21 2011
...DANGEROUS HEAT WAVE CONTINUES ACROSS MUCH OF THE CENTRAL U.S.
AND EASTERN U.S. TODAY...
EXCESSIVE HEAT WATCHES...WARNINGS AND HEAT ADVISORIES ARE IN
EFFECT FOR MUCH OF THE CENTRAL U.S. AND OHIO RIVER VALLEY...AS
WELL AS AREAS FROM THE CAROLINAS NORTHWARD INTO NEW ENGLAND.
TEMPERATURES WILL FEEL LIKE 100 TO 110 DEGREES OR HIGHER DURING
THE AFTERNOON HOURS.
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE
http://WWW.WEATHER.GOVHEAT INDEX SAFETY INFORMATION AND MEANINGS OF WATCHES...WARNINGS
AND ADVISORIES CAN BE FOUND AT
http://WWW.WEATHER.GOV/OM/HEAT/INDEX.SHTMLGRAPHICAL HEAT INDEX FORECASTS CAN BE FOUND AT
http://www.hpc.ncep.noaa.gov/heat_index_MAX.shtml...SELECTED HIGH HEAT INDEX VALUES FROM WEDNESDAY JUL 20 2011...
...ALABAMA...
MUSCLE SHOALS 106
CULLMAN 105
...ARKANSAS...
ARKADELPHIA 111
SEARCY 106
FORT SMITH 105
...GEORGIA...
THOMASTON 111
DUBLIN 110
DOUGLAS 107
AUGUSTA 106
LA GRANGE 106
...ILLINOIS...
TAYLORVILLE 115
FREEPORT 113
MOUNT VERNON 112
STERLING ROCKFALLS 112
CHICAGO 109
SPRINGFIELD 109
PEORIA 107
...INDIANA...
GRISSOM AFB 120
LAFAYETTE 117
INDIANAPOLIS 115
HUNTINGBURG 114
BLOOMINGTON 113
...IOWA...
COUNCIL BLUFFS 123ATLANTIC 121
NEWTON 121
KNOXVILLE 117
ANKENY 113
DES MOINES 109
...KANSAS...
HAYS 108
HILL CITY 108
SALINA 108
TOPEKA 107
WICHITA 106
...KENTUCKY...
FORT KNOX 117
OWENSBORO 117
BOWLING GREEN 111
COVINGTON 108
LEXINGTON 107
...MARYLAND...
FREDERICK 108
BALTIMORE 105
...MICHIGAN...
BENTON HARBOR 111
COLDWATER 110
GRAND RAPIDS 107
TULIP CITY 106
TRAVERSE CITY 105
DETROIT 103
...MINNESOTA...
AUSTIN 110
HUTCHINSON 110
MINNEAPOLIS 110
OWATONNA 108
ST. CLOUD 105
...MISSOURI...
ST. LOUIS 108
WHITEMAN AFB 107
JEFFERSON CITY 106
KANSAS CITY 105
JOPLIN 105
...NORTH CAROLINA...
POPE AFB 111
SEYMOUR-JOHNSON AFB 109
CONCORD 107
RALEIGH 106
ROCKY MOUNT 106
...OHIO...
HAMILTON 106
DAYTON 104
TOLEDO 104
WILMINGTON 102
...OKLAHOMA...
DUNCAN 108
CHANDLER 107
STILLWATER 107
TULSA 107
OKLAHOMA CITY 102
...NEBRASKA...
TEKAMAH 113
OFFUTT AFB 111
LINCOLN 109
HASTINGS 107
COLUMBUS 105
...SOUTH CAROLINA...
MYRTLE BEACH 108
DARLINGTON 107
CHARLESTON 106
FLORENCE 106
COLUMBIA 105
...TENNESSEE...
MEMPHIS 112
DYERSBURG 105
NASHVILLE 105
KNOXVILLE 104
...VIRGINIA...
FARMVILLE 115
SHANNON 114
CULPEPER 110
PETERSBURG 110
...WISCONSIN...
WATERTOWN 114
BOSCOBEL 110
KENOSHA 110
MILWAUKEE 109
LA CROSSE 107
MADISON 106
A LARGE RIDGE OF HIGH PRESSURE IN THE UPPER LEVELS OF THE
ATMOSPHERE REMAINS IN PLACE ACROSS THE CENTRAL AND EASTERN
U.S...KEEPING HOT TEMPERATURES IN PLACE. THE HOT TEMPERATURES
COMBINED WITH HIGH RELATIVE HUMIDITY WILL CREATE DANGEROUS HEAT
INDICES WELL ABOVE 100 DEGREES OVER A LARGE PORTION OF THE NATION.
HIGH TEMPERATURES NEAR 100 DEGREES WILL BE POSSIBLE TODAY ACROSS
MUCH OF THE MID-ATLANTIC STATES AND PARTS OF THE SOUTHEAST U.S.
FRIDAY WILL BE THE HOTTEST DAY ACROSS THE MID-ATLANTIC
STATES...WHERE HEAT INDICES OF 115 DEGREES WILL BE POSSIBLE. THESE
TRIPLE-DIGIT TEMPERATURES ARE FORECAST TO REMAIN IN PLACE ACROSS
THE EASTERN U.S. THROUGH SATURDAY...BEFORE COOLING OFF SLIGHTLY TO
THE MID 90S BY SUNDAY. THE EXTREMELY HOT TEMPERATURES SHOULD BEGIN
TO SUBSIDE ACROSS PORTIONS OF THE NORTHERN PLAINS TODAY...BUT THE
INTENSE HEAT WILL REMAIN IN PLACE THROUGH THE WEEKEND ACROSS THE
CENTRAL AND SOUTHERN PLAINS.
THE NEXT STORM SUMMARY WILL BE ISSUED BY THE HYDROMETEOROLOGICAL
PREDICTION CENTER AT 500 AM EDT...FRIDAY JULY 22. PLEASE REFER TO
YOUR LOCAL NATIONAL WEATHER SERVICE OFFICE FOR ADDITIONAL
INFORMATION ON THIS EVENT.
RYAN
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. If your in an extremely hot car on a bright, hot, muggy, summer day...then the air temperature can be over 50ºC and the humidity would be soaring past that. I did go into one on the hottest day of the year in 2006 and just breathing the hot air is difficult and not long after 2 mins you can't bear it. I suppose the heat indices were similar to that, like breathing in sauna air?
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