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Jul
19

How High will the Heat Index Go?

By · July 19, 2011 at 9:45 am

Indy topped out at 94 Monday with a max heat index of 101. Courtesy of the National Weather Service

It’s the buzz around town in Indy and across the Plains, Midwest, and Ohio Valley: it’s HOT!  Monday’s high made it to 94 for the second straight day.  Our heat index peaked at 101.  Check out the conditions around Central Indiana at 4pm and you’ll see low 90s for temperatures and low to mid 70s for dew points are making it feel very uncomfortable.  An EXCESSIVE HEAT WARNING goes into effect at 2pm Tuesday and continues through Saturday!  It will be dangerously hot!

So how high will the heat index go?  Combining rising temperatures with rising dew points, our heat indices may rise above 110 later this week!

Here’s a list of forecast max heat index values through the week:
Tuesday: 108
Wednesday: 112
Thursday: 112
Friday: 105
Saturday: 105
Sunday: 103

Check out Monday’s Highest Heat Indices courtesy of NOAA.  Knoxville, Iowa had the highest heat index in the country at a whopping 131!!!

STORM SUMMARY NUMBER 05 FOR HIGH HEAT INDICES
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
500 AM EDT TUE JUL 19 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. AND OHIO RIVER
VALLEY. 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 MONDAY JUL 18 2011...

...ILLINOIS...
FREEPORT                                      124
MOLINE                                        112
RANTOUL                                       111
SAVANNAH                                      110
QUINCY                                        106
TAYLORVILLE                                   105

...INDIANA...
GRISSOM AFB                                   110
LAFAYETTE                                     106
INDIANAPOLIS                                  101

...IOWA...
KNOXVILLE                                     131
NEWTON                                        129
ATLANTIC                                      126
COUNCIL BLUFFS                                126
ORANGE CITY                                   123
ALGONA                                        122
ANKENY                                        122
SPENCER                                       118
SIOUX CITY                                    117
WATERLOO                                      116
DES MOINES                                    114

...KANSAS...
LAWRENCE                                      110
TOPEKA                                        108
GREAT BEND                                    107
SALINA                                        107
WICHITA                                       107
HAYS                                          106
HILL CITY                                     106

...MICHIGAN...
LENAWEE COUNTY ARPT                           107
ANN ARBOR                                     105
HILLSDALE                                     105
JACKSON                                       105

...MINNESOTA...
MADISON                                       124
HUTCHINSON                                    123
AUSTIN                                        121
REDWOOD FALLS                                 119
ROCHESTER                                     118
MARSHALL                                      117
MINNEAPOLIS                                   117
ST JAMES                                      117
NEW ULM                                       114
PIPESTONE                                     114

...MISSOURI...
KIRKSVILLE                                    107
WHITEMAN AFB                                  106
KANSAS CITY                                   105

...OKLAHOMA...
SHAWNEE                                       111
CHANDLER                                      109
ARDMORE                                       108
OKLAHOMA CITY                                 106
PONCA CITY                                    106
STILLWATER                                    106

...NEBRASKA...
OFFUTT AFB                                    117
TEKAMAH                                       117
HEBRON                                        115
FALLS CITY                                    113
LINCOLN                                       111
ALBION                                        110
KEARNEY                                       107

...SOUTH DAKOTA...
CHAMBERLAIN                                   115
MITCHELL                                      115
ABERDEEN                                      114
HURON                                         113
PIERRE                                        113
SIOUX FALLS                                   111
WATERTOWN                                     109

...TEXAS...
DALLAS                                        108
PARIS                                         106
TYLER                                         105

...WISCONSIN...
WATERTOWN                                     119
BOSCOBEL                                      117
LONE ROCK                                     115
MADISON                                       114
PRAIRIE DU CHIEN                              114
VOLK                                          114
EAU CLAIRE                                    113
STEVENS POINT                                 110
MILWAUKEE                                     107

Here in Indiana, we did NOT make the “hottest heat index” list…yet.  But that heat and humidity will be pushing eastward and we could be in the thick of it the rest of the week!
And while our heat wave will certainly be worthy of complaining, you might recall last summer, when we hit 90 or hotter a whopping 37 times! (In contrast, Monday made day 13 of 90+ heat in 2011).
We average 18 days/year of 90-degree heat.

A lot of the precautions you can take to stay safe in the extreme heat are simple common sense.  For a refresher, check out this link from the National Weather Service: http://www.weather.gov/om/heat/index.shtml

Stay cool!

-Chikage
-Meteorologist Chikage Windler Follow Chikage on TwitterBecome a fan on Facebook

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