Alert archive / Wisconsin / Heat Advisories in 2021
Heat Advisory 3, NWS La Crosse, WI
NWS La Crosse, WI issued this heat advisory at Aug 10, 2021, 2:26 PM CDT for Grant County, Wisconsin; Clayton County, Iowa. It took effect at Aug 11, 2021, 12:00 PM CDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2021, 2:26 PM CDT (19:26 UTC)
- In effect from
- Aug 11, 2021, 12:00 PM CDT
- Expired
- Aug 11, 2021, 5:00 PM CDT
- In force
- 5 hr
- Issued by
- NWS La Crosse, WI
Counties Clayton County, IA, Grant County, WI
The radar
The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 19:27 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.4 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3755 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
214 WWUS73 KARX 101926 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 226 PM CDT Tue Aug 10 2021 IAZ030-WIZ061-110600- /O.NEW.KARX.HT.Y.0003.210811T1700Z-210811T2200Z/ /O.CON.KARX.HT.Y.0002.000000T0000Z-210811T0000Z/ Clayton-Grant- Including the cities of Elkader and Platteville 226 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM NOON TO 5 PM CDT WEDNESDAY... * WHAT...For the first Heat Advisory, heat index values up to 107. For the second Heat Advisory, heat index values up to 101 expected. * WHERE...In Wisconsin, Grant County. In Iowa, Clayton County. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from noon to 5 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ IAZ010-011-018-019-029-WIZ054-055-110000- /O.CON.KARX.HT.Y.0002.000000T0000Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Crawford-Richland- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Prairie Du Chien, and Richland Center 226 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 105. * WHERE...In Wisconsin, Richland and Crawford Counties. In Iowa, Chickasaw, Floyd, Allamakee, Winneshiek and Fayette Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
5 follow-up statements
819 WWUS73 KARX 102240 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 540 PM CDT Tue Aug 10 2021 IAZ030-WIZ061-110645- /O.CAN.KARX.HT.Y.0002.000000T0000Z-210811T0000Z/ /O.CON.KARX.HT.Y.0003.210811T1700Z-210811T2200Z/ Clayton-Grant- Including the cities of Elkader and Platteville 540 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 5 PM CDT WEDNESDAY... ...HEAT ADVISORY IS CANCELLED... * WHAT...The Heat Advisory for today has been cancelled due to the storms in the area cooling temperatures down below heat advisory criteria. For the second Heat Advisory Wednesday, heat index values up to 101 are expected. * WHERE...In Iowa, Clayton County. In Wisconsin, Grant County. * WHEN...From noon to 5 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ IAZ010-011-018-019-029-WIZ054-055-102345- /O.CAN.KARX.HT.Y.0002.000000T0000Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Crawford-Richland- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Prairie Du Chien, and Richland Center 540 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY IS CANCELLED... The Heat Advisory for today has been cancelled due to the storms in the area cooling temperatures down below heat advisory criteria. $$ Zapotocny
191 WWUS73 KARX 110347 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 1047 PM CDT Tue Aug 10 2021 IAZ030-WIZ061-111400- /O.CON.KARX.HT.Y.0003.210811T1700Z-210811T2200Z/ Clayton-Grant- Including the cities of Elkader and Platteville 1047 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 5 PM CDT WEDNESDAY... * WHAT...The Heat Advisory for today has been cancelled due to the storms in the area cooling temperatures down below heat advisory criteria. For the second Heat Advisory Wednesday, heat index values up to 101 are expected. * WHERE...In Iowa, Clayton County. In Wisconsin, Grant County. * WHEN...From noon to 5 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
534 WWUS73 KARX 110942 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 442 AM CDT Wed Aug 11 2021 IAZ030-WIZ061-111745- /O.CON.KARX.HT.Y.0003.210811T1700Z-210811T2200Z/ Clayton-Grant- Including the cities of Elkader and Platteville 442 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 5 PM CDT THIS AFTERNOON... * WHAT...Heat indicies will be in the 100 to 105 range again today. * WHERE...In Iowa, Clayton County. In Wisconsin, Grant County. * WHEN...From noon to 5 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Shea
734 WWUS73 KARX 111636 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 1136 AM CDT Wed Aug 11 2021 IAZ030-WIZ061-112200- /O.CON.KARX.HT.Y.0003.210811T1700Z-210811T2200Z/ Clayton-Grant- Including the cities of Elkader and Platteville 1136 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 5 PM CDT THIS AFTERNOON... * WHAT...Heat indicies will be in the 100 to 105 range again today. * WHERE...In Iowa, Clayton County. In Wisconsin, Grant County. * WHEN...From noon to 5 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
470 WWUS73 KARX 112122 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 422 PM CDT Wed Aug 11 2021 IAZ030-WIZ061-112230- /O.CON.KARX.HT.Y.0003.000000T0000Z-210811T2200Z/ Clayton-Grant- Including the cities of Elkader and Platteville 422 PM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 5 PM CDT THIS AFTERNOON... * WHAT...Heat indicies will be in the 100 to 105 range again today. * WHERE...In Iowa, Clayton County. In Wisconsin, Grant County. * WHEN...From noon to 5 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. The Heat Advisory will be allowed to expire at 5 pm. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:23 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant | 52 min |
| Aug 10, 3:56 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant, Richland | 64 min |
| Aug 10, 4:57 PM CDT | Severe Thunderstorm Warning | ARX | Richland | 18 min |
| Aug 10, 2:10 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Fayette, Winneshiek | 50 min |
| Aug 10, 2:43 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton, Fayette, Winneshiek | 62 min |
Nearby
Heat Advisories in Wisconsin, 2021Heat Advisories in Iowa, 2021Every heat advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.