Alert archive / Iowa / Heat Advisories in 2021
Heat Advisory 3, NWS Quad Cities, IA
NWS Quad Cities, IA issued this heat advisory at Jul 27, 2021, 3:12 AM CDT for 21 counties in Iowa; 13 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jul 28, 2021, 11:00 AM CDT. It was in force for 32 hr.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2021, 3:12 AM CDT (08:12 UTC)
- In effect from
- Jul 28, 2021, 11:00 AM CDT
- Expired
- Jul 29, 2021, 7:06 PM CDT
- In force
- 32 hr
- Issued by
- NWS Quad Cities, IA
All 36 counties
Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 41 km from the middle of the area, began a volume at 08:09 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 00:00Z, 8.2 hours before the alert went out and 47 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
- 2 J/kg
- Mixed-layer CIN
- -305 J/kg
- Mixed-layer LCL
- 1970 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
938 WWUS73 KDVN 270812 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 312 AM CDT Tue Jul 27 2021 IAZ040-051>054-063>068-076>078-087>089-098-099-ILZ009-015>018- 024>026-034-035-MOZ009-010-271615- /O.NEW.KDVN.HT.Y.0003.210728T1700Z-210729T0300Z/ Buchanan-Benton-Linn-Jones-Jackson-Iowa-Johnson-Cedar-Clinton- Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-Henry IA- Des Moines-Van Buren-Lee-Whiteside-Rock Island-Henry IL-Bureau- Putnam-Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Independence, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Sterling, Moline, Rock Island, Geneseo, Princeton, Hennepin, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 312 AM CDT Tue Jul 27 2021 ...HEAT ADVISORY IN EFFECT FROM NOON TO 10 PM CDT WEDNESDAY... * 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 to 10 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. && $$ www.weather.gov/dvn
10 follow-up statements
138 WWUS73 KDVN 271534 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 1034 AM CDT Tue Jul 27 2021 IAZ040-051>054-063>068-076>078-087>089-098-099-ILZ009-015>018- 024>026-034-035-MOZ009-010-272345- /O.CON.KDVN.HT.Y.0003.210728T1700Z-210729T0300Z/ Buchanan-Benton-Linn-Jones-Jackson-Iowa-Johnson-Cedar-Clinton- Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-Henry IA- Des Moines-Van Buren-Lee-Whiteside-Rock Island-Henry IL-Bureau- Putnam-Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Independence, Vinton, Cedar Rapids, Anamosa, Maquoketa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Sterling, Moline, Rock Island, Geneseo, Princeton, Hennepin, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 1034 AM CDT Tue Jul 27 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TO 10 PM CDT WEDNESDAY... * 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 to 10 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. && $$ www.weather.gov/dvn
234 WWUS73 KDVN 271939 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 239 PM CDT Tue Jul 27 2021 IAZ041-042-ILZ001-002-007-280345- /O.EXB.KDVN.HT.Y.0003.210728T1600Z-210729T0300Z/ Delaware-Dubuque-Jo Daviess-Stephenson-Carroll- Including the cities of Manchester, Dubuque, Galena, Freeport, and Mount Carroll 239 PM CDT Tue Jul 27 2021 ...HEAT ADVISORY IN EFFECT FROM 11 AM TO 10 PM CDT WEDNESDAY... * WHAT...Heat index values of 100 to 105 expected Wednesday afternoon. * WHERE...In Iowa, Delaware and Dubuque Counties. In Illinois, Jo Daviess, Stephenson and Carroll Counties. * WHEN...From 11 AM to 10 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. && $$ IAZ040-051>054-066-ILZ009-017-018-280345- /O.EXT.KDVN.HT.Y.0003.210728T1600Z-210729T0300Z/ Buchanan-Benton-Linn-Jones-Jackson-Clinton-Whiteside-Bureau- Putnam- Including the cities of Independence, Vinton, Cedar Rapids, Anamosa, Maquoketa, Clinton, Sterling, Princeton, and Hennepin 239 PM CDT Tue Jul 27 2021 ...HEAT ADVISORY NOW IN EFFECT FROM 11 AM TO 10 PM CDT WEDNESDAY... * WHAT...Heat index values of 100 to 105 expected Wednesday afternoon. * WHERE...Portions of northeast Missouri, east central, northeast and southeast Iowa and north central, northwest and west central Illinois. * WHEN...From 11 AM to 10 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-280345- /O.EXT.KDVN.HT.Y.0003.210728T1600Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 239 PM CDT Tue Jul 27 2021 ...HEAT ADVISORY NOW IN EFFECT FROM 11 AM WEDNESDAY TO 8 PM CDT THURSDAY... * WHAT...Heat index values of 100 to 105 expected Wednesday afternoon and Thursday afternoon. * WHERE...Portions of northeast Missouri, east central, northeast and southeast Iowa and north central, northwest and west central Illinois. * WHEN...From 11 AM Wednesday to 8 PM CDT Thursday. * 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. && $$ www.weather.gov/dvn
082 WWUS73 KDVN 280833 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 333 AM CDT Wed Jul 28 2021 IAZ040>042-051>054-066-ILZ001-002-007-009-017-018-281645- /O.CON.KDVN.HT.Y.0003.210728T1600Z-210729T0300Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Clinton- Jo Daviess-Stephenson-Carroll-Whiteside-Bureau-Putnam- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Clinton, Galena, Freeport, Mount Carroll, Sterling, Princeton, and Hennepin 333 AM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 expected this afternoon and evening. * WHERE...Along and north of the U.S. Highway 30 corridor. * WHEN...From 11 AM to 10 PM CDT today. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-281645- /O.CON.KDVN.HT.Y.0003.210728T1600Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 333 AM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM CDT THURSDAY... * WHAT...Heat index values of 100 to 105 expected this afternoon and evening, and again Thursday afternoon and evening. * WHERE...South of the U.S. Highway 30 corridor. * WHEN...From 11 AM today to 8 PM CDT Thursday. * 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. && $$ RP Kinney www.weather.gov/dvn
846 WWUS73 KDVN 281538 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 1038 AM CDT Wed Jul 28 2021 IAZ040>042-051>054-066-ILZ001-002-007-009-017-018-282345- /O.CON.KDVN.HT.Y.0003.210728T1600Z-210729T0300Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Clinton- Jo Daviess-Stephenson-Carroll-Whiteside-Bureau-Putnam- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Clinton, Galena, Freeport, Mount Carroll, Sterling, Princeton, and Hennepin 1038 AM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Heat index values up to 105 expected this afternoon and evening. * WHERE...Along and north of the Highway 30 corridor. * WHEN...From 11 AM to 10 PM CDT today. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-282345- /O.CON.KDVN.HT.Y.0003.210728T1600Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 1038 AM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THURSDAY... * WHAT...Heat index values of 100 to 105 expected this afternoon and evening, and again Thursday afternoon and evening. * WHERE...Portions of northeast Missouri, east central and southeast Iowa and northwest and west central Illinois. * WHEN...From 11 AM CDT today to 8 PM CDT Thursday. * 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. && $$ GROSS www.weather.gov/dvn
145 WWUS73 KDVN 290053 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 753 PM CDT Wed Jul 28 2021 IAZ040>042-051>054-066-ILZ001-002-007-009-017-018-290300- /O.CON.KDVN.HT.Y.0003.000000T0000Z-210729T0300Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Clinton- Jo Daviess-Stephenson-Carroll-Whiteside-Bureau-Putnam- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Clinton, Galena, Freeport, Mount Carroll, Sterling, Princeton, and Hennepin 753 PM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Heat index values up to 100 expected this evening. * WHERE...Along and north of the Highway 30 corridor. * WHEN...Until 10 PM CDT today. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-290900- /O.CON.KDVN.HT.Y.0003.000000T0000Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 753 PM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THURSDAY... * WHAT...Heat index values of 100 expected this evening, and values of 100 to 105 expected again Thursday afternoon and evening. * WHERE...Portions of northeast Missouri, east central and southeast Iowa and northwest and west central Illinois. * WHEN...Until 8 PM CDT Thursday. * 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. && $$ www.weather.gov/dvn
297 WWUS73 KDVN 290204 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 904 PM CDT Wed Jul 28 2021 IAZ040>042-051>054-066-ILZ001-002-007-009-017-018-290315- /O.CAN.KDVN.HT.Y.0003.000000T0000Z-210729T0300Z/ Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Clinton- Jo Daviess-Stephenson-Carroll-Whiteside-Bureau-Putnam- Including the cities of Independence, Manchester, Dubuque, Vinton, Cedar Rapids, Anamosa, Maquoketa, Clinton, Galena, Freeport, Mount Carroll, Sterling, Princeton, and Hennepin 904 PM CDT Wed Jul 28 2021 ...HEAT ADVISORY IS CANCELLED... Heat index values have fallen below 100 degrees across the area with the sunset. Therefore, the advisory has been cancelled. $$ IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-291015- /O.CON.KDVN.HT.Y.0003.000000T0000Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 904 PM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THURSDAY... * WHAT...Heat index values of 100 to 105 expected Thursday afternoon and evening. * WHERE...Portions of northeast Missouri, east central and southeast Iowa and northwest and west central Illinois. * WHEN...Until 8 PM CDT Thursday. * 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. && $$ www.weather.gov/dvn
783 WWUS73 KDVN 290819 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 319 AM CDT Thu Jul 29 2021 IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-291630- /O.CON.KDVN.HT.Y.0003.000000T0000Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 319 AM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 expected this afternoon and evening. * WHERE...Portions of northeast Missouri, east central and southeast Iowa and northwest and west central Illinois. * WHEN...Until 8 PM CDT Tonight. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ www.weather.gov/dvn
654 WWUS73 KDVN 291743 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 1243 PM CDT Thu Jul 29 2021 IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-300100- /O.CON.KDVN.HT.Y.0003.000000T0000Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 1243 PM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 expected this afternoon and evening. * WHERE...Portions of northeast Missouri, east central and southeast Iowa and northwest and west central Illinois. * WHEN...Until 8 PM CDT Tonight. * 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. && $$ www.weather.gov/dvn
931 WWUS73 KDVN 292048 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 348 PM CDT Thu Jul 29 2021 IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-300100- /O.CON.KDVN.HT.Y.0003.000000T0000Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 348 PM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...Heat index values of 100 to 105 expected through this evening. * WHERE...Portions of northeast Missouri, east central and southeast Iowa and northwest and west central Illinois. * WHEN...Until 8 PM CDT Tonight. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ www.weather.gov/dvn
458 WWUS73 KDVN 300006 NPWDVN URGENT - WEATHER MESSAGE National Weather Service Quad Cities IA IL 706 PM CDT Thu Jul 29 2021 IAZ063>065-067-068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-300115- /O.CAN.KDVN.HT.Y.0003.000000T0000Z-210730T0100Z/ Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-Louisa- Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-Henry IL- Mercer-Henderson-Warren-Hancock-McDonough-Scotland-Clark- Including the cities of Marengo, Iowa City, Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 706 PM CDT Thu Jul 29 2021 ...HEAT ADVISORY IS CANCELLED... Heat Index values across southeast Iowa, west-central Illinois, and extreme northeast Missouri have dropped below 100 degrees. Thus the Heat Advisory has been cancelled. Expect temperatures to slowly fall this evening, but most noticable by tomorrow morning will be the arrival of a less humid air mass. $$ wolf www.weather.gov/dvn
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this heat advisory went out at Jul 27, 3:12 AM CDT, 0 minutes earlier.
Area forecast discussion, Jul 27, 3:12 AM CDT, 0 minutes before
Area Forecast Discussion
National Weather Service Quad Cities IA IL
312 AM CDT Tue Jul 27 2021
.SYNOPSIS...
Issued at 310 AM CDT Tue Jul 27 2021
High pressure was over the region early this morning with mostly
clear skies and calm or light southerly winds. Temperatures ranged
from 63 in Monticello to 72 in Fort Madison. Dew points were mostly
in the lower and middle 60s.
&&
.SHORT TERM...(Today and Tonight)
ISSUED AT 310 AM CDT Tue Jul 27 2021
Today, a light southwesterly breeze will bring warmer and slightly
more humid air into the region today, with mostly sunny skies. Dew
points will be increasing into the mid 60s to low 70s. Models have
been overdoing temps of late and with some smoke-filtered sun opted
to keep temps in upper 80s and lower 90s. Heat indices will top out
in the 92 to 99 range.
Tonight, clouds will increase across the north as some models show a
disturbance moving across NE IA into northern IL. Have slight chance
pops for the highway 20 corridor after midnight tonight. Otherwise,
it will be a warm and muggy night with mostly clear skies elsewhere.
Lows will be in the upper 60s to low 70s.
.LONG TERM...(Wednesday through Monday)
ISSUED AT 310 AM CDT Tue Jul 27 2021
...Heat headlines are likely needed for both Wednesday and
Thursday...
Our criteria for Heat Advisory is widespread 100 to 105 Heat Index.
This is right in the middle of the guidance spread forecast for our
area Wednesday. The south half is forecast to reach that range again
Thursday afternoon. As often happens when we're expecting heat
index readings to be high, there are some indications that
convection may occur, especially in the northeast Wednesday, and
area wide Thursday. While convection is a low chance of occurring,
it would certainly disrupt the heat from verifying.
For that reason, I'm planning on taking this one day at a time, and
going with only a Heat Advisory for Wednesday Noon to 10 PM, and in
all but our far north/northeast where office collaboration prefers
to wait on this. In this period, even the 25% NBM, which has
verified best over the past 2 days with the filtered smoke taking 2-
3 degrees off the NBM blend's over forecast. For Wednesday, this
results in highs in the lower 90s east and north to mid 90s central
and west/south. Dewpoints are confidently forecast to reach the 72
to 76 range, which is well below the highest guidance, and should
occur with minimal advection into the area. The combination of
afternoon heat/humidity will allow for widespread 100 to 106 heat
index readings, which best fits an advisory product.
Thursday has the highest confidence in dewpoints in the 75 to 78
range, though it rather low confidence in temperatures exceeding 90
as AM convection debris and afternoon storms are possible. These
contrasting confidence inputs into heat index will keep us just
mentioning it in the HWO and in graphics, but not going with a
continuation into the advisory through Thursday, which is could
need!
Storms both late Wednesday night and Thursday will have access to
high CAPE pool over the region, so while flow is weak over our area,
some strong storms are certainly possible.
Friday through Monday will be dominated by cooler surface high
pressure and northwest flow aloft. For now, the primary active warm
frontal processes appear to be taking place well to the west of our
CWA.
Highs late in the period are in the 80s, and lows in 60s, which is a
welcome reprieve from the daily heat of late.
ERVIN
&&
.AVIATION...(For the 06Z TAFS through 06Z Tuesday Night)
ISSUED AT 1220 AM CDT Tue Jul 27 2021
VFR conditions will prevail with mostly clear skies and light
southwest winds.
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...Heat Advisory from noon to 10 PM CDT Wednesday for Benton-
Buchanan-Cedar-Clinton-Des Moines-Henry IA-Iowa-Jackson-
Jefferson-Johnson-Jones-Keokuk-Lee-Linn-Louisa-Muscatine-
Scott-Van Buren-Washington.
IL...Heat Advisory from noon to 10 PM CDT Wednesday for Bureau-
Hancock-Henderson-Henry IL-McDonough-Mercer-Putnam-Rock
Island-Warren-Whiteside.
MO...Heat Advisory from noon to 10 PM CDT Wednesday for Clark-
Scotland.
&&
SYNOPSIS...14
SHORT TERM...14
LONG TERM...Ervin
AVIATION...14Hazardous weather outlook, Jul 26, 3:01 PM CDT, 12 hours 11 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 301 PM CDT Mon Jul 26 2021 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-270900- 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- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 301 PM CDT Mon Jul 26 2021 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...THIS EVENING AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Hot and humid conditions will continue for much of the upcoming week, with highs in the upper 80s to mid 90s. Afternoon heat indices are expected to reach the 90 to 100 range Tuesday, and the 95 to 105 range Wednesday. There is a chance for thunderstorms Wednesday night along and north of highway 20. Lightning, heavy rain, and damaging winds will be the primary threats. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight. GROSS
Nearby
Heat Advisories in Iowa, 2021Heat Advisories in Illinois, 2021Heat Advisories in Missouri, 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.