THE HYDROMETEOROLOGICAL PREDICTION CENTER

CAMP SPRINGS, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 04 FOR HIGH HEAT INDICES
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
500 AM EDT MON JUL 18 2011

...COMBINATION OF VERY HOT TEMPERATURES AND HIGH HUMIDITY WILL
CREATE DANGEROUS HEAT INDICES OVER THE CENTRAL U.S. THE HOT
WEATHER WILL SPREAD INTO THE EASTERN U.S. THIS WEEK...

EXCESSIVE HEAT WATCHES...WARNINGS AND HEAT ADVISORIES ARE IN
EFFECT FOR A LARGE PORTION OF THE CENTRAL U.S. 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 WWW.WEATHER.GOV

HEAT INDEX SAFETY INFORMATION AND MEANINGS OF WATCHES...WARNINGS
AND ADVISORIES CAN BE FOUND AT WWW.WEATHER.GOV/OM/HEAT/INDEX.SHTML

GRAPHICAL HEAT INDEX FORECASTS CAN BE FOUND AT
www.hpc.ncep.noaa.gov/heat_index_MAX.shtml


...SELECTED HIGH HEAT INDEX VALUES FROM SUNDAY JUL 17 2011...

...ARKANSAS...
ARKADELPHIA                              107
FORT SMITH                               106

...ILLINOIS...
RANTOUL                                  108
SAVANNAH                                 108
MOLINE                                   105
TAYLORVILLE                              105
CHICAGO                                  103

...IOWA...
NEWTON                                   126
KNOXVILLE                                125
COUNCIL BLUFFS                           124
ATLANTIC                                 121
ORANGE CITY                              117
SHENANDOAH                               116
SIOUX CITY                               116
ALGONA                                   114
ESTHERVILLE                              114
DES MOINES                               111
IOWA CITY                                111

...KANSAS...
TOPEKA                                   110
HUTCHINSON                               108
SALINA                                   107
WICHITA                                  107
EMPORIA                                  106
HAYS                                     105

...LOUISIANA...
MONROE                                   109
BASTROP                                  108

...MINNESOTA...
MADISON                                  119
HUTCHINSON                               116
AUSTIN                                   112
BENSON                                   111
FAIRMONT                                 111
ST JAMES                                 111
WINDOM                                   111
MINNEAPOLIS                              109
LITCHFIELD                               108

...MISSOURI...
LITTON                                   108
WHITEMAN AFB                             106
KANSAS CITY                              105

...OKLAHOMA...
SHAWNEE                                  112
ATOKA                                    108
OKMULGEE                                 108
BARTLESVILLE                             107
STILLWATER                               106
TULSA                                    105

...NEBRASKA...
YORK                                     116
NORFOLK                                  115
TEKAMAH                                  115
OMAHA                                    113
LINCOLN                                  111
ALBION                                   110
COLUMBUS                                 110
ORD                                      108
VALENTINE                                108

...NORTH DAKOTA...
GWINNER                                  117
BISMARCK                                 115
LINTON                                   111
JAMESTOWN                                110
FARGO                                    108

...SOUTH DAKOTA...
MITCHELL                                 120
ABERDEEN                                 117
HURON                                    117
CHAMBERLAIN                              116
SIOUX FALLS                              115
WINNER                                   115
WATERTOWN                                111
MOBRIDGE                                 110
PIERRE                                   108

...TEXAS...
MINEOLA                                  106
NACOGDOCHES                              106
TYLER                                    106

...WISCONSIN...
VOLK/CAMP DOUGLAS                        114
CLINTONVILLE                             113
EAU CLAIRE                               112
LADYSMITH                                111
MINOCQUA                                 111
PHILLIPS                                 111
GREEN BAY                                110
WISCONSIN RAPIDS                         110
MADISON                                  107
MILWAUKEE                                106


A LARGE RIDGE OF HIGH PRESSURE IN THE UPPER LEVELS OF THE
ATMOSPHERE REMAINS IN PLACE ACROSS THE CENTRAL 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. THE UPPER-LEVEL
RIDGE WILL BEGIN TO EXPAND EASTWARD THIS WEEK. BY MIDWEEK...THE
HOT TEMPERATURES WILL BEGIN TO SPREAD INTO THE EASTERN
STATES...WITH HIGH TEMPERATURES IN THE MID TO UPPER 90S ARRIVING
IN THE MID-ATLANTIC STATES AS SOON AS WEDNESDAY. HIGH TEMPERATURES
IN EXCESS OF 100 DEGREES WILL BE POSSIBLE BY THURSDAY ACROSS MUCH
OF THE MID-ATLANTIC STATES AND PARTS OF THE SOUTHEAST U.S. THESE
TRIPLE-DIGIT TEMPERATURES ARE FORECAST TO REMAIN IN PLACE ACROSS
THE EASTERN U.S. THROUGH THE WEEKEND.

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE HYDROMETEOROLOGICAL
PREDICTION CENTER AT 500 AM EDT...TUESDAY JULY 19. PLEASE REFER TO
YOUR LOCAL NATIONAL WEATHER SERVICE OFFICE FOR ADDITIONAL
INFORMATION ON THIS EVENT.

RYAN




Last Updated: 500 AM EDT MON JUL 18 2011