Alert archive / Iowa / Heat Advisories in 2021
Heat Advisory 2, NWS La Crosse, WI
NWS La Crosse, WI issued this heat advisory at Aug 9, 2021, 1:55 PM CDT for Crawford County, Grant County, Richland County, Wisconsin; 6 counties in Iowa. It took effect at Aug 10, 2021, 12:00 PM CDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 2021, 1:55 PM CDT (18:55 UTC)
- In effect from
- Aug 10, 2021, 12:00 PM CDT
- Expired
- Aug 10, 2021, 5:40 PM CDT
- In force
- 6 hr
- Issued by
- NWS La Crosse, WI
Counties Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Winneshiek County, IA, Crawford County, WI, Grant County, WI, Richland County, WI
The radar
The La Crosse radar (KARX), 85 km from the middle of the area, began a volume at 18:58 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, 6.9 hours before the alert went out and 184 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
- 1676 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 705 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.7
The text
As transmitted.
051 WWUS73 KARX 091855 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 155 PM CDT Mon Aug 9 2021 IAZ010-011-018-019-029-030-WIZ054-055-061-100300- /O.NEW.KARX.HT.Y.0002.210810T1700Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Clayton-Crawford- Richland-Grant- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Prairie Du Chien, Richland Center, and Platteville 155 PM CDT Mon Aug 9 2021 ...HEAT ADVISORY IN EFFECT FROM NOON TO 7 PM CDT TUESDAY... * WHAT...Heat index values up to 104 expected. * WHERE...In Wisconsin, Crawford, Richland and Grant Counties. In Iowa, Winneshiek, Allamakee, Floyd, Chickasaw, Fayette and Clayton Counties. * WHEN...From noon to 7 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...There is some uncertainty in this temperature forecast, especially given the potential for thunderstorms to move through during the morning hours. Stay tuned for the latest information. 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. && $$ KDS
5 follow-up statements
068 WWUS73 KARX 100135 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 835 PM CDT Mon Aug 9 2021 IAZ010-011-018-019-029-030-WIZ054-055-061-101000- /O.CON.KARX.HT.Y.0002.210810T1700Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Clayton-Crawford- Richland-Grant- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Prairie Du Chien, Richland Center, and Platteville 835 PM CDT Mon Aug 9 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 7 PM CDT TUESDAY... * WHAT...Heat index values up to 104 expected. * WHERE...In Wisconsin, Crawford, Richland and Grant Counties. In Iowa, Winneshiek, Allamakee, Floyd, Chickasaw, Fayette and Clayton Counties. * WHEN...From noon to 7 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...There is some uncertainty in this temperature forecast, especially given the potential for thunderstorms to move through during the morning hours. Stay tuned for the latest information. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
023 WWUS73 KARX 100850 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 350 AM CDT Tue Aug 10 2021 IAZ010-011-018-019-029-030-WIZ054-055-061-101700- /O.CON.KARX.HT.Y.0002.210810T1700Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Clayton-Crawford- Richland-Grant- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Prairie Du Chien, Richland Center, and Platteville 350 AM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 104 expected. * WHERE...In Wisconsin, Crawford, Richland and Grant Counties. In Iowa, Winneshiek, Allamakee, Floyd, Chickasaw, Fayette and Clayton Counties. * WHEN...From noon to 7 PM CDT Today. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...There is some uncertainty in this temperature forecast, especially given the potential for clouds and thunderstorms today. 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. && $$
559 WWUS73 KARX 101751 NPWARX URGENT - WEATHER MESSAGE National Weather Service La Crosse WI 1251 PM CDT Tue Aug 10 2021 IAZ010-011-018-019-029-030-WIZ054-055-061-110000- /O.CON.KARX.HT.Y.0002.000000T0000Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Clayton-Crawford- Richland-Grant- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Elkader, Prairie Du Chien, Richland Center, and Platteville 1251 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 106. * WHERE...In Wisconsin, Grant, Richland and Crawford Counties. In Iowa, Chickasaw, Floyd, Clayton, Allamakee, Winneshiek and Fayette Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ KDS
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. && $$ IAZ010-011-018-019-029-WIZ054-055-110000- /O.CON.KARX.HT.Y.0002.000000T0000Z-210811T0000Z/ Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-Crawford-Richland- Including the cities of Decorah, Waukon, Charles City, New Hampton, Oelwein, Prairie Du Chien, and Richland Center 226 PM CDT Tue Aug 10 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 105. * WHERE...In Wisconsin, Richland and Crawford Counties. In Iowa, Chickasaw, Floyd, Allamakee, Winneshiek and Fayette Counties. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
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
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 9:11 PM CDT | River Flood Watch | ARX | La Crosse, Trempealeau | 48 hr |
| Aug 9, 9:17 AM CDT | River Flood Watch | ARX | Juneau | 36 hr |
| Aug 8, 9:50 PM CDT | Special Weather Statement | ARX | Allamakee, Chickasaw, Clayton, Fayette, Howard, Winneshiek | 55 min |
| Aug 9, 12:10 AM CDT | Flash Flood Warning | ARX | Chickasaw, Floyd | 6 hr |
Nearby
Heat Advisories in Iowa, 2021Heat Advisories in Wisconsin, 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.