Several consecutive days were experienced with an extremely stressful combination of high heat and humidity. Heat indices frequently rose above 115 degrees during the day, with temperatures reaching the 90s and dew points remaining in the 70s to lower 80s. The high heat and humidity were evident at night, with minimum temperatures usually in the middle to upper 70s, and in some cases 80 degrees or a little higher. There were some cases of heat related illnesses in people, and several reports of livestock deaths.

Excessive Heat in SANBORN, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in GREGORY, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in MINNEHAHA, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock. An unknown number of people were treated in Sioux Falls for heat related illnesses.

Excessive Heat in TURNER, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in YANKTON, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in LINCOLN, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in UNION, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in CLAY, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in BEADLE, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock. A few heat related illnesses in people were treated in Huron.

Excessive Heat in JERAULD, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in BRULE, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 03:00:00 (CST-6)
Property damage: 5.00K
Crop damage: 0.00K
Reported by: ASOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock. At least 10 livestock deaths were reported in the county.

Excessive Heat in AURORA, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 03:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in BROOKINGS, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in CHARLES MIX, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in DAVISON, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in DOUGLAS, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock. Over 50 cattle were reported to have died from the heat in the county.

Excessive Heat in KINGSBURY, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in MINER, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in HUTCHINSON, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in HANSON, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in LAKE, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in BON HOMME, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in MOODY, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.

Excessive Heat in MCCOOK, SOUTH DAKOTA
From 15-JUL-11 12:00:00 to 20-JUL-11 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

An extended period of excessive heat produced daytime temperatures reaching the 90s and dew points in the 70s to lower 80s, with heat indices often reaching or exceeding 115 degrees. Nighttime temperatures often in the mid 70s to lower 80s with continued high humidity provided little if any relief. The heat and humidity caused prolonged stress on people and livestock.