Alert archive / Illinois / High Wind Warnings in 2021
High Wind Warning 1, NWS Quad Cities, IA
NWS Quad Cities, IA issued this high wind warning at Aug 11, 2021, 8:16 AM CDT for 5 counties in Iowa; 6 counties in Illinois. It was in force for 104 min. 15 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 11, 2021, 8:16 AM CDT (13:16 UTC)
- Expired
- Aug 11, 2021, 10:00 AM CDT
- In force
- 104 min
- Issued by
- NWS Quad Cities, IA
Counties Clinton County, IA, Des Moines County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Henderson County, IL, Henry County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Whiteside County, IL
The radar
The Quad Cities radar (KDVN), 33 km from the middle of the area, began a volume at 13:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 8:16 AM CDT | NON-TSTM WND GST 61 | Davenport Municipality, IA | WIND GUST ON ASOS. |
| Aug 11, 8:17 AM CDT | NON-TSTM WND DMG | 1 Nnw Fruitland, IL | REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| Aug 11, 8:20 AM CDT | NON-TSTM WND DMG | 1 Ene Davenport, IA | POWER OUT WITH A TREE DOWN, ALONG WITH A SNAPPED POWER POLE. |
| Aug 11, 8:25 AM CDT | NON-TSTM WND DMG | 1 Se Davenport, IA | LARGE TREE DOWN. |
| Aug 11, 8:25 AM CDT | NON-TSTM WND DMG | 2 Sw Bettendorf, IA | LARGE TREE LIMB DOWN, ESTIMATED 3-5 INCHES FROM PHOTO. |
| Aug 11, 8:25 AM CDT | HEAVY RAIN 1.87 | 1 Nne Burlington Region, IA | HEAVY RAIN FROM THIS MORNING. |
| Aug 11, 8:25 AM CDT | HEAVY RAIN 3.25 | 5 Sse Sperry, IA | RAINFALL IN PAST 2 HRS. |
| Aug 11, 8:30 AM CDT | TSTM WND DMG | 1 Wsw Riverdale, IA | SOCIAL MEDIA REPORT OF A TRAMPOLINE, WITH A SHEET METAL SHED BLOWN ON TOP OF A TRUCK. |
| Aug 11, 8:30 AM CDT | TSTM WND DMG | 3 Wsw Bettendorf, IA | THROUGHOUT METRO AREA: APPROXIMATELY 7,200 WITHOUT POWER DUE TO MULTIPLE TREES & LIMBS DOWN WITH LINES. PER RESPONDERS, THE STORM CAUSED TWO STRUCTURE FIRES (ONE IN DAVENPORT & ONE IN BETTENDORF). |
| Aug 11, 8:30 AM CDT | HAIL 0.25 | 3 Ne Beaverdale, IA | PEA HAIL, TIME ESTIMATED FROM RADAR. DELAYED REPORT. |
| Aug 11, 8:30 AM CDT | NON-TSTM WND DMG | 1 E Reynolds, IL | SEVERAL TREE LIMBS DOWN. |
| Aug 11, 8:30 AM CDT | HEAVY RAIN 1.6 | Oquawka, IL | RAINFALL IN PAST 2 HRS. |
| Aug 11, 8:38 AM CDT | NON-TSTM WND DMG | 1 Nnw Mount Joy, IA | LARGE LIMB OFF TREE, ABOUT 12 INCH DIAMETER. |
| Aug 11, 8:45 AM CDT | TSTM WND DMG | Morrison, IL | LARGE TREE BRANCH DOWN, APPROXIMATELY 15 TO 18 INCHES IN DIAMETER. |
| Aug 11, 8:45 AM CDT | NON-TSTM WND DMG | 1 Nw Eldridge, IA | 4 INCH TREE LIMBS DOWN AT NEIGHBORS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 1.3 hours before the alert went out and 36 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
- 2852 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.7
The text
As transmitted.
256 WWUS73 KDVN 111316 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 816 AM CDT Wed Aug 11 2021 IAZ066>068-078-089-ILZ015-024>026-112130- /O.NEW.KDVN.HW.W.0001.210811T1316Z-210811T1500Z/ /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Clinton-Muscatine-Scott-Louisa-Des Moines-Rock Island-Mercer- Henderson-Warren- Including the cities of Clinton, Muscatine, Davenport, Bettendorf, Wapello, Burlington, Moline, Rock Island, Aledo, Oquawka, and Monmouth 816 AM CDT Wed Aug 11 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...For the High Wind Warning, south to southwest winds will gust up to 60 mph until 10 am. For the Heat Advisory, heat index values up to 105 expected. * WHERE...In Iowa, Clinton, Muscatine, Scott, Louisa and Des Moines Counties. In Illinois, Rock Island, Mercer, Henderson and Warren Counties. * WHEN...For the High Wind Warning, until 10 AM CDT this morning. For the Heat Advisory, from noon today to 7 PM CDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. 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. && $$ IAZ040>042-051>054-063>065-076-077-087-088-098-099-ILZ001-002-007- 009-016>018-034-035-MOZ009-010-112130- /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Keokuk-Washington-Jefferson-Henry IA-Van Buren-Lee- Jo Daviess-Stephenson-Carroll-Whiteside-Henry IL-Bureau-Putnam- Hancock-McDonough-Scotland-Clark- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Sigourney, Washington, Fairfield, Mount Pleasant, Keosauqua, Fort Madison, Galena, Freeport, Mount Carroll, Sterling, Geneseo, Princeton, Hennepin, Carthage, Macomb, Memphis, and Kahoka 816 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 105 expected. * WHERE...Portions of northeast Missouri, east central, northeast and southeast Iowa and north central, northwest and west central Illinois. * WHEN...From noon today to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ www.weather.gov/dvn
3 follow-up statements
113 WWUS73 KDVN 111351 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 851 AM CDT Wed Aug 11 2021 IAZ066>068-078-089-112200- /O.CAN.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Clinton-Muscatine-Scott-Louisa-Des Moines- Including the cities of Clinton, Muscatine, Davenport, Bettendorf, Wapello, and Burlington 851 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... ...HIGH WIND WARNING IS CANCELLED... * WHAT...Heat index values up to 106 expected. * WHERE...Des Moines, Clinton, Scott, Muscatine and Louisa Counties. * WHEN...From noon today to 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. && $$ ILZ009-016-112200- /O.EXA.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Whiteside-Henry IL- Including the cities of Sterling and Geneseo 851 AM CDT Wed Aug 11 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...For the High Wind Warning, southwest winds 230 to 40 mph gusting up to 60 mph. For the Heat Advisory, heat index values up to 105 this afternoon. * WHERE...Whiteside and Henry IL Counties. * WHEN...For the High Wind Warning, until 10 AM CDT this morning. For the Heat Advisory, from noon today to 7 PM CDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...Strong, damaging winds will continue after thunderstorms exit the area. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. 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. && $$ ILZ015-024>026-112200- /O.CON.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Rock Island-Mercer-Henderson-Warren- Including the cities of Moline, Rock Island, Aledo, Oquawka, and Monmouth 851 AM CDT Wed Aug 11 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...For the High Wind Warning, southwest winds 30 to 40 mph with gusts up to 60 mph. For the Heat Advisory, heat index values up to 105 expected. * WHERE...Warren, Henderson, Mercer and Rock Island Counties. * WHEN...For the High Wind Warning, until 10 AM CDT this morning. For the Heat Advisory, from noon today to 7 PM CDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. 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. && $$ IAZ040>042-051>054-063>065-076-077-087-088-098-099-ILZ001-002-007- 017-018-034-035-MOZ009-010-112200- /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Keokuk-Washington-Jefferson-Henry IA-Van Buren-Lee- Jo Daviess-Stephenson-Carroll-Bureau-Putnam-Hancock-McDonough- Scotland-Clark- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Sigourney, Washington, Fairfield, Mount Pleasant, Keosauqua, Fort Madison, Galena, Freeport, Mount Carroll, Princeton, Hennepin, Carthage, Macomb, Memphis, and Kahoka 851 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 106 expected. * WHERE...Portions of northeast Missouri, east central, northeast and southeast Iowa and north central, northwest and west central Illinois. * WHEN...From noon today to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ www.weather.gov/dvn
005 WWUS73 KDVN 111400 CCA NPWDVN URGENT - WEATHER MESSAGE...CORRECTED National Weather Service Quad Cities IA IL 900 AM CDT Wed Aug 11 2021 IAZ066>068-078-089-112200- /O.CAN.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Clinton-Muscatine-Scott-Louisa-Des Moines- Including the cities of Clinton, Muscatine, Davenport, Bettendorf, Wapello, and Burlington 900 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... ...HIGH WIND WARNING IS CANCELLED... * WHAT...Heat index values up to 106 expected. * WHERE...Des Moines, Clinton, Scott, Muscatine and Louisa Counties. * WHEN...From noon today to 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. && $$ ILZ009-016-112200- /O.COR.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.COR.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Whiteside-Henry IL- Including the cities of Sterling and Geneseo 900 AM CDT Wed Aug 11 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...For the High Wind Warning, southwest winds 30 to 40 mph with gusts up to 60 mph. For the Heat Advisory, heat index values up to 105 this afternoon. * WHERE...Whiteside and Henry IL Counties. * WHEN...For the High Wind Warning, until 10 AM CDT this morning. For the Heat Advisory, from noon today to 7 PM CDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...Strong, damaging winds will continue after thunderstorms exit the area. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. 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. && $$ ILZ015-024>026-112200- /O.COR.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.COR.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Rock Island-Mercer-Henderson-Warren- Including the cities of Moline, Rock Island, Aledo, Oquawka, and Monmouth 900 AM CDT Wed Aug 11 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...For the High Wind Warning, southwest winds 30 to 40 mph with gusts up to 60 mph. For the Heat Advisory, heat index values up to 105 expected. * WHERE...Warren, Henderson, Mercer and Rock Island Counties. * WHEN...For the High Wind Warning, until 10 AM CDT this morning. For the Heat Advisory, from noon today to 7 PM CDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS...Strong, damaging winds will continue after thunderstorms exit the area. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. 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. && $$ IAZ040>042-051>054-063>065-076-077-087-088-098-099-ILZ001-002-007- 017-018-034-035-MOZ009-010-112200- /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Keokuk-Washington-Jefferson-Henry IA-Van Buren-Lee- Jo Daviess-Stephenson-Carroll-Bureau-Putnam-Hancock-McDonough- Scotland-Clark- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Sigourney, Washington, Fairfield, Mount Pleasant, Keosauqua, Fort Madison, Galena, Freeport, Mount Carroll, Princeton, Hennepin, Carthage, Macomb, Memphis, and Kahoka 900 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 106 expected. * WHERE...Portions of northeast Missouri, east central, northeast and southeast Iowa and north central, northwest and west central Illinois. * WHEN...From noon today to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ www.weather.gov/dvn
944 WWUS73 KDVN 111455 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 955 AM CDT Wed Aug 11 2021 ILZ009-015-016-024>026-112300- /O.EXP.KDVN.HW.W.0001.000000T0000Z-210811T1500Z/ /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Whiteside-Rock Island-Henry IL-Mercer-Henderson-Warren- Including the cities of Sterling, Moline, Rock Island, Geneseo, Aledo, Oquawka, and Monmouth 955 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HIGH WIND WARNING WILL EXPIRE AT 10 AM CDT THIS MORNING... * WHAT...Heat index values up to 105 expected. * WHERE...Whiteside and Henry IL Counties. * WHEN...From noon to 7 PM CDT today. * 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. && $$ IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 017-018-034-035-MOZ009-010-112300- /O.CON.KDVN.HT.Y.0005.210811T1700Z-210812T0000Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Bureau-Putnam-Hancock-McDonough-Scotland-Clark- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Galena, Freeport, Mount Carroll, Princeton, Hennepin, Carthage, Macomb, Memphis, and Kahoka 955 AM CDT Wed Aug 11 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Heat index values up to 106 expected. * WHERE...Portions of northeast Missouri, east central, northeast and southeast Iowa and north central, northwest and west central Illinois. * WHEN...From noon to 7 PM CDT today. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Haase www.weather.gov/dvn
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:38 AM CDT | Special Weather Statement | DVN | Lee | 37 min |
| Aug 11, 5:56 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 19 min |
| Aug 11, 6:10 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Lee | 20 min |
| Aug 11, 6:24 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 22 min |
| Aug 11, 6:38 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 37 min |
| Aug 11, 6:59 AM CDT | Flash Flood Warning | DVN | Des Moines, Lee | 3 hr |
| Aug 11, 7:04 AM CDT | Special Weather Statement | DVN | Muscatine | 26 min |
| Aug 11, 9:46 AM CDT | Areal Flood Warning | DVN | Des Moines, Lee | 3 hr |
| Aug 11, 10:24 AM CDT | Special Weather Statement | DVN | Lee | 21 min |
| Aug 11, 3:36 PM CDT | Special Weather Statement | DVN | Washington | 24 min |
| Aug 11, 4:26 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 49 min |
| Aug 11, 5:11 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jackson, Jones | 49 min |
| Aug 11, 5:38 PM CDT | Tornado Warning | DVN | Dubuque | 13 min |
| Aug 11, 6:24 AM CDT | Special Weather Statement | DVN | McDonough | 36 min |
| Aug 11, 7:32 AM CDT | Special Weather Statement | DVN | Rock Island | 28 min |
| Aug 11, 7:55 AM CDT | Special Weather Statement | DVN | Bureau, Henry, Whiteside | 65 min |
| Aug 11, 8:07 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Rock Island, Whiteside | 53 min |
| Aug 11, 8:33 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam, Whiteside | 57 min |
| Aug 11, 9:59 AM CDT | Special Weather Statement | DVN | McDonough | 31 min |
| Aug 11, 10:45 AM CDT | Special Weather Statement | DVN | Henderson, Warren | 30 min |
| Aug 11, 10:57 AM CDT | Severe Thunderstorm Warning | DVN | Henderson, McDonough, Warren | 33 min |
Nearby
High Wind Warnings in Illinois, 2021High Wind Warnings in Iowa, 2021Every high wind warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.