Alert archive / Iowa / Excessive Heat Warnings in 2011
Excessive Heat Warning 2, NWS Quad Cities, IA
NWS Quad Cities, IA issued this excessive heat warning at Aug 2, 2011, 3:50 AM CDT for 9 counties in Illinois; 13 counties in Iowa; Clark County, Scotland County, Missouri. It was in force for 18 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 2, 2011, 3:50 AM CDT (08:50 UTC)
- Expired
- Aug 2, 2011, 10:00 PM CDT
- In force
- 18 hr
- Issued by
- NWS Quad Cities, IA
All 24 counties
Cedar County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Warren County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 73 km from the middle of the area, began a volume at 08:52 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, 8.8 hours before the alert went out and 78 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
- 3531 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 1135 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
265 WWUS73 KDVN 020850 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 350 AM CDT TUE AUG 2 2011 ...HOT AND HUMID WEATHER CONTINUES TODAY... .HOT AND HUMID CONDITIONS WILL CONTINUE ONE MORE DAY AS AFTERNOON TEMPERATURES CLIMB WELL INTO THE 90S...WITH A FEW LOCATIONS POSSIBLY REACHING 100 DEGREES. COMBINED WITH DEW POINTS IN THE MID AND UPPER 70S...HEAT INDEX VALUES IN THE 100S WILL RESULT...WITH SEVERAL LOCATIONS EXCEEDING 110. A COLD FRONT WILL MOVE THROUGH THE REGION LATE THIS AFTERNOON AND EVENING...BRINGING RELIEF IN THE FORM OF SLIGHTLY COOLER AND LESS HUMID AIR FOR THE REST OF THE WEEK. IAZ063-064-076-077-087-088-098-099-ILZ034-MOZ009-010-021900- /O.UPG.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ /O.NEW.KDVN.EH.W.0002.110802T0850Z-110803T0300Z/ IOWA-JOHNSON-KEOKUK-WASHINGTON-JEFFERSON-HENRY IA-VAN BUREN-LEE- HANCOCK-SCOTLAND-CLARK- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...SIGOURNEY... WASHINGTON...FAIRFIELD...MOUNT PLEASANT...KEOSAUQUA.... FORT MADISON...CARTHAGE...MEMPHIS...KAHOKA 350 AM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 10 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED AN EXCESSIVE HEAT WARNING...WHICH IS IN EFFECT UNTIL 10 PM CDT THIS EVENING. THE HEAT ADVISORY IS NO LONGER IN EFFECT. * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 95 TO 100 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO AROUND 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE PROLONGED PERIOD OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK OF HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES AND HIGH HUMIDITY WILL OCCUR. THIS COMBINATION WILL LEAD TO A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ065-067-068-078-089-ILZ015>018-024>026-035-021900- /O.UPG.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ /O.NEW.KDVN.EH.W.0002.110802T0850Z-110803T0300Z/ CEDAR-MUSCATINE-SCOTT-LOUISA-DES MOINES-ROCK ISLAND-HENRY IL- BUREAU-PUTNAM-MERCER-HENDERSON-WARREN-MCDONOUGH- INCLUDING THE CITIES OF...TIPTON...MUSCATINE...BETTENDORF... DAVENPORT...WAPELLO...BURLINGTON...MOLINE...ROCK ISLAND... KEWANEE...PRINCETON...HENNEPIN...ALEDO...OQUAWKA...MONMOUTH... MACOMB 350 AM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 10 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN QUAD CITIES HAS ISSUED AN EXCESSIVE HEAT WARNING...WHICH IS IN EFFECT UNTIL 10 PM CDT THIS EVENING. THE HEAT ADVISORY IS NO LONGER IN EFFECT. * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 95 AND 100 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE COMBINATION OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK FOR HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES AND HIGH HUMIDITY WILL OCCUR. THIS COMBINATION WILL LEAD TO A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ040-051-052-021900- /O.CON.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ BUCHANAN-BENTON-LINN- INCLUDING THE CITIES OF...INDEPENDENCE...VINTON...CEDAR RAPIDS 350 AM CDT TUE AUG 2 2011 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 90 AND 95 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE PROLONGED PERIOD OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK OF HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH HUMIDITY IS EXPECTED. THIS COMBINATION WILL LEAD TO POSSIBLE HEAT ILLNESSES. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ041-042-053-054-066-ILZ001-002-007-009-021900- /O.CON.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ DELAWARE-DUBUQUE-JONES-JACKSON-CLINTON-JO DAVIESS-STEPHENSON- CARROLL-WHITESIDE- INCLUDING THE CITIES OF...MANCHESTER...DUBUQUE...ANAMOSA... MAQUOKETA...CLINTON...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 350 AM CDT TUE AUG 2 2011 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING THROUGH THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 90 AND 95 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE COMBINATION OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK FOR HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH HUMIDITY IS EXPECTED. THIS COMBINATION WILL LEAD TO POSSIBLE HEAT ILLNESSES. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY...CALL 9 1 1. && $$
3 follow-up statements
282 WWUS73 KDVN 021601 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1101 AM CDT TUE AUG 2 2011 ...HOT AND HUMID WEATHER CONTINUES TODAY... .HOT AND HUMID CONDITIONS WILL CONTINUE ONE MORE DAY AS AFTERNOON TEMPERATURES CLIMB WELL INTO THE 90S...WITH A FEW LOCATIONS REACHING 100 DEGREES. COMBINED WITH DEW POINTS IN THE MID AND UPPER 70S...HEAT INDEX VALUES WILL RANGE FROM 100 TO 110...WITH SEVERAL LOCATIONS EXCEEDING 110. A COLD FRONT WILL MOVE THROUGH THE REGION LATE THIS AFTERNOON AND EVENING...BRINGING RELIEF IN THE FORM OF SLIGHTLY COOLER AND LESS HUMID AIR FOR THE REST OF THE WEEK. IAZ063-064-076-077-087-088-098-099-ILZ034-MOZ009-010-030215- /O.CON.KDVN.EH.W.0002.000000T0000Z-110803T0300Z/ IOWA-JOHNSON-KEOKUK-WASHINGTON-JEFFERSON-HENRY IA-VAN BUREN-LEE- HANCOCK-SCOTLAND-CLARK- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...SIGOURNEY... WASHINGTON...FAIRFIELD...MOUNT PLEASANT...KEOSAUQUA.... FORT MADISON...CARTHAGE...MEMPHIS...KAHOKA 1101 AM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 94 TO 102 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO AROUND 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE PROLONGED PERIOD OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK OF HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES AND HIGH HUMIDITY WILL OCCUR. THIS COMBINATION WILL LEAD TO A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ065-067-068-078-089-ILZ015>018-024>026-035-030215- /O.CON.KDVN.EH.W.0002.000000T0000Z-110803T0300Z/ CEDAR-MUSCATINE-SCOTT-LOUISA-DES MOINES-ROCK ISLAND-HENRY IL- BUREAU-PUTNAM-MERCER-HENDERSON-WARREN-MCDONOUGH- INCLUDING THE CITIES OF...TIPTON...MUSCATINE...BETTENDORF... DAVENPORT...WAPELLO...BURLINGTON...MOLINE...ROCK ISLAND... KEWANEE...PRINCETON...HENNEPIN...ALEDO...OQUAWKA...MONMOUTH... MACOMB 1101 AM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 95 AND 100 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE COMBINATION OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK FOR HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES AND HIGH HUMIDITY WILL OCCUR. THIS COMBINATION WILL LEAD TO A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ040-051-052-030215- /O.CON.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ BUCHANAN-BENTON-LINN- INCLUDING THE CITIES OF...INDEPENDENCE...VINTON...CEDAR RAPIDS 1101 AM CDT TUE AUG 2 2011 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 91 AND 96 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE PROLONGED PERIOD OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK OF HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH HUMIDITY IS EXPECTED. THIS COMBINATION WILL LEAD TO POSSIBLE HEAT ILLNESSES. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ041-042-053-054-066-ILZ001-002-007-009-030215- /O.CON.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ DELAWARE-DUBUQUE-JONES-JACKSON-CLINTON-JO DAVIESS-STEPHENSON- CARROLL-WHITESIDE- INCLUDING THE CITIES OF...MANCHESTER...DUBUQUE...ANAMOSA... MAQUOKETA...CLINTON...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 1101 AM CDT TUE AUG 2 2011 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING THROUGH THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES BETWEEN 91 AND 96 WITH DEW POINTS IN THE MID TO UPPER 70S. HEAT INDEX VALUES OF 105 TO 115 CAN BE EXPECTED. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE COMBINATION OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK FOR HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH HUMIDITY IS EXPECTED. THIS COMBINATION WILL LEAD TO POSSIBLE HEAT ILLNESSES. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY...CALL 9 1 1. && $$
192 WWUS73 KDVN 022011 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 311 PM CDT TUE AUG 2 2011 ...HOT AND HUMID WEATHER CONTINUES INTO THIS EVENING... .TEMPERATURES WILL REMAIN IN THE 90S LATE THIS AFTERNOON AND EARLY EVENING. THESE TEMPERATURES COMBINED WITH DEW POINTS IN THE MID AND UPPER 70S WILL CREATE DANGEROUS HEAT INDEX VALUES FROM 105 TO 115. A COLD FRONT WILL MOVE THROUGH THE REGION LATE THIS AFTERNOON AND EVENING...BRINGING RELIEF IN THE FORM OF SLIGHTLY COOLER AND LESS HUMID AIR FOR THE REST OF THE WEEK. IAZ063-064-076-077-087-088-098-099-ILZ034-MOZ009-010-030300- /O.CON.KDVN.EH.W.0002.000000T0000Z-110803T0300Z/ IOWA-JOHNSON-KEOKUK-WASHINGTON-JEFFERSON-HENRY IA-VAN BUREN-LEE- HANCOCK-SCOTLAND-CLARK- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...SIGOURNEY... WASHINGTON...FAIRFIELD...MOUNT PLEASANT...KEOSAUQUA.... FORT MADISON...CARTHAGE...MEMPHIS...KAHOKA 311 PM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES IN THE 90S WITH DEW POINTS IN THE MID TO UPPER 70S. THIS WILL PRODUCE HEAT INDEX VALUES OF 105 TO 115. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE PROLONGED PERIOD OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK OF HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES AND HIGH HUMIDITY WILL OCCUR. THIS COMBINATION WILL LEAD TO A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ065-067-068-078-089-ILZ015>018-024>026-035-030300- /O.CON.KDVN.EH.W.0002.000000T0000Z-110803T0300Z/ CEDAR-MUSCATINE-SCOTT-LOUISA-DES MOINES-ROCK ISLAND-HENRY IL- BUREAU-PUTNAM-MERCER-HENDERSON-WARREN-MCDONOUGH- INCLUDING THE CITIES OF...TIPTON...MUSCATINE...BETTENDORF... DAVENPORT...WAPELLO...BURLINGTON...MOLINE...ROCK ISLAND... KEWANEE...PRINCETON...HENNEPIN...ALEDO...OQUAWKA...MONMOUTH... MACOMB 311 PM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES IN THE 90S WITH DEW POINTS IN THE MID TO UPPER 70S. THIS WILL PRODUCE HEAT INDEX VALUES OF 105 TO 115. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE COMBINATION OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK FOR HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF DANGEROUSLY HOT TEMPERATURES AND HIGH HUMIDITY WILL OCCUR. THIS COMBINATION WILL LEAD TO A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ040-051-052-030300- /O.CON.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ BUCHANAN-BENTON-LINN- INCLUDING THE CITIES OF...INDEPENDENCE...VINTON...CEDAR RAPIDS 311 PM CDT TUE AUG 2 2011 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING UNTIL THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES IN THE UPPER 80S TO LOWER 90S WITH DEW POINTS IN THE MID TO UPPER 70S. THIS WILL PRODUCE HEAT INDEX VALUES OF 100 TO 110. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE PROLONGED PERIOD OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK OF HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH HUMIDITY IS EXPECTED. THIS COMBINATION WILL LEAD TO POSSIBLE HEAT ILLNESSES. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. 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 LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. 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. && $$ IAZ041-042-053-054-066-ILZ001-002-007-009-030300- /O.CON.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ DELAWARE-DUBUQUE-JONES-JACKSON-CLINTON-JO DAVIESS-STEPHENSON- CARROLL-WHITESIDE- INCLUDING THE CITIES OF...MANCHESTER...DUBUQUE...ANAMOSA... MAQUOKETA...CLINTON...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 311 PM CDT TUE AUG 2 2011 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * TIMING...CONTINUING THROUGH THIS EVENING WHEN A COLD FRONT MOVES THROUGH. * HEAT INDEX/TEMPERATURE...AFTERNOON AND EARLY EVENING TEMPERATURES IN THE UPPER 80S TO LOWER 90S WITH DEW POINTS IN THE MID TO UPPER 70S. THIS WILL PRODUCE HEAT INDEX VALUES OF 100 TO 110. * HEAT INDEX VALUES OVER 110 ARE EXTREMELY DANGEROUS TO LIFE THREATENING TO BOTH PEOPLE AND ANIMALS. * IMPACTS...THE COMBINATION OF DANGEROUS HEAT AND HUMIDITY WILL INCREASE THE RISK FOR HEAT RELATED ILLNESSES. THE EFFECTS OF HEAT STRESS CAN BE CUMULATIVE OVER A COUPLE OF DAYS OF HOT AND HUMID CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH HUMIDITY IS EXPECTED. THIS COMBINATION WILL LEAD TO POSSIBLE HEAT ILLNESSES. DRINK PLENTY OF FLUIDS...STAY IN AN AIR- CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON RELATIVES AND NEIGHBORS...ESPECIALLY THE ELDERLY. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY...CALL 9 1 1. && $$
433 WWUS73 KDVN 030246 NPWDVN URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 946 PM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING AND ADVISORY WILL EXPIRE AT 10 PM CDT THIS EVENING... IAZ063-064-076-077-087-088-098-099-ILZ034-MOZ009-010-030400- /O.EXP.KDVN.EH.W.0002.000000T0000Z-110803T0300Z/ IOWA-JOHNSON-KEOKUK-WASHINGTON-JEFFERSON-HENRY IA-VAN BUREN-LEE- HANCOCK-SCOTLAND-CLARK- INCLUDING THE CITIES OF...MARENGO...IOWA CITY...SIGOURNEY... WASHINGTON...FAIRFIELD...MOUNT PLEASANT...KEOSAUQUA.... FORT MADISON...CARTHAGE...MEMPHIS...KAHOKA 946 PM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 10 PM CDT THIS EVENING... COOLER AND SLIGHTLY DRIER AIR IS MOVING INTO THE REGION ON NORTHWEST WINDS. THIS IS ALLOWING HEAT INDEX VALUES TO FALL BELOW WARNING CRITERIA FOR THE NEAR FUTURE. THEREFORE...THE EXCESSIVE HEAT WARNING WILL BE ALLOWED TO EXPIRE AT 10 PM. $$ IAZ065-067-068-078-089-ILZ015>018-024>026-035-030400- /O.EXP.KDVN.EH.W.0002.000000T0000Z-110803T0300Z/ CEDAR-MUSCATINE-SCOTT-LOUISA-DES MOINES-ROCK ISLAND-HENRY IL- BUREAU-PUTNAM-MERCER-HENDERSON-WARREN-MCDONOUGH- INCLUDING THE CITIES OF...TIPTON...MUSCATINE...BETTENDORF... DAVENPORT...WAPELLO...BURLINGTON...MOLINE...ROCK ISLAND... KEWANEE...PRINCETON...HENNEPIN...ALEDO...OQUAWKA...MONMOUTH... MACOMB 946 PM CDT TUE AUG 2 2011 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 10 PM CDT THIS EVENING... COOLER AND SLIGHTLY DRIER AIR IS MOVING INTO THE REGION ON NORTHWEST WINDS. THIS IS ALLOWING HEAT INDEX VALUES TO FALL BELOW WARNING CRITERIA FOR THE NEAR FUTURE. THEREFORE...THE EXCESSIVE HEAT WARNING WILL BE ALLOWED TO EXPIRE AT 10 PM. $$ IAZ040-051-052-030400- /O.EXP.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ BUCHANAN-BENTON-LINN- INCLUDING THE CITIES OF...INDEPENDENCE...VINTON...CEDAR RAPIDS 946 PM CDT TUE AUG 2 2011 ...HEAT ADVISORY WILL EXPIRE AT 10 PM CDT THIS EVENING... COOLER AND SLIGHTLY DRIER AIR IS MOVING INTO THE REGION ON NORTHWEST WINDS. THIS IS ALLOWING HEAT INDEX VALUES TO FALL BELOW ADVISORY CRITERIA FOR THE NEAR FUTURE. THEREFORE...THE EXCESSIVE HEAT WARNING WILL BE ALLOWED TO EXPIRE AT 10 PM. $$ IAZ041-042-053-054-066-ILZ001-002-007-009-030400- /O.EXP.KDVN.HT.Y.0009.000000T0000Z-110803T0300Z/ DELAWARE-DUBUQUE-JONES-JACKSON-CLINTON-JO DAVIESS-STEPHENSON- CARROLL-WHITESIDE- INCLUDING THE CITIES OF...MANCHESTER...DUBUQUE...ANAMOSA... MAQUOKETA...CLINTON...GALENA...FREEPORT...MOUNT CARROLL... STERLING...ROCK FALLS 946 PM CDT TUE AUG 2 2011 ...HEAT ADVISORY WILL EXPIRE AT 10 PM CDT THIS EVENING... COOLER AND SLIGHTLY DRIER AIR IS MOVING INTO THE REGION ON NORTHWEST WINDS. THIS IS ALLOWING HEAT INDEX VALUES TO FALL BELOW ADVISORY CRITERIA FOR THE NEAR FUTURE. THEREFORE...THE EXCESSIVE HEAT WARNING WILL BE ALLOWED TO EXPIRE AT 10 PM. $$ NICHOLS
What forecasters said that day
The local office's own words before this excessive heat warning 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 excessive heat warning went out at Aug 2, 3:33 AM CDT, 17 minutes earlier.
Area forecast discussion, Aug 2, 3:33 AM CDT, 17 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
333 AM CDT TUE AUG 2 2011
.SYNOPSIS...
UPPER RIDGING EXTENDED NORTH FROM THE SOUTHERN PLAINS HIGH THROUGH
CENTRAL IA AND MN AT 00Z. AT THE SURFACE LOW PRESSURE WAS LOCATED
OVER EASTERN SD AT 06Z. A COLD FRONT EXTENDED SOUTH AND WEST FROM
THE LOW THROUGH WESTERN NE. AN MCS WAS ONGOING AHEAD OF THE NRN
PLAINS SURFACE LOW. AS OF 07Z THE MCS WAS LOCATED OVER NORTHEAST MN
AND NW WI AND HAS BEEN MOVING EAST. NOW THAT THE MCS WAS MOVING
INTO A REGION OF DEEPER NW FLOW...IT SHOULD TAKE ON A MORE
SOUTHEASTERLY TRAJECTORY.
&&
.SHORT TERM...TODAY AND TONIGHT...
THE COLD FRONT IS PROGGED TO MOVE SOUTHEAST TODAY AND SHOULD BE
THROUGH THE NORTHEAST THIRD OF THE CWFA BY 00Z AND THROUGH ALL OF
THE CWFA BY 06Z. THE LATE AFTERNOON ARRIVAL OF THE FRONT WILL GIVE
THE AREA PLENTY OF TIME TO HEAT UP TODAY. MODELS SHOW A LOW LEVEL
THERMAL AXIS PRECEDING THE FRONT WITH 925MB TEMPS AS HIGH AS +29C
SPREADING SOUTHEAST AHEAD OF THE SURFACE FRONT THIS AFTERNOON. THIS
WILL HELP TEMPERATURES SOAR INTO THE 90S AND POTENTIALLY TO AROUND
100 IN THE SOUTH TODAY. ALSO EXPECT HIGH DEWPOINTS IN THE 75 TO 80
RANGE OVER THE CENTRAL AND SOUTH. THESE TEMPERATURES AND DEWPOINTS
WILL PUSH THE HEAT INDEX OVER THE SOUTHERN HALF WELL OVER 105 AND
COULD GET INTO THE 115 TO 120 RANGE. FOR AREAS ALONG AND SOUTH OF
I80 THIS WILL BE THE SECOND DAY WITH A HEAT INDEX EXCEEDING 105 SO
HAVE UPGRADED THE HEAT ADVISORY TO A WARNING. IN THE NORTH...WILL
MAINTAIN THE HEAT ADVISORY.
HAVE MAINTAINED A DRY FORECAST FOR THIS MORNING. THE MCS OVER MN/WI
SHOULD BE FAR ENOUGH EAST TO MISS THE CWFA IF IT WERE TO TAKE ON
MORE SOUTHERLY MOVEMENT. THE DRY FORECAST WAS MAINTAINED THROUGH
MID AFTERNOON AND THEN WENT WITH LOW CHANCE POPS IN THE NORTHERN
THIRD ALONG THE FRONT DUE TO VERY UNSTABLE LOW LEVELS ADJACENT TO
THE BOUNDARY AS WELL AS SOME WEAKENING IN THE MID LEVEL CAP. BROAD
BRUSH CHANCE POPS COVERED MOST OF THE CWFA THIS EVENING. AGAIN
THESE POPS ARE CONTINGENT ON THE CAP BREAKING NEAR THE SURFACE
BOUNDARY. DUE TO THE HIGH CAPES NEAR THE FRONT LATE THIS AFTERNOON
AND THIS EVENING AND SOME MODERATE DEEP LAYER SHEAR...THERE IS A LOW
RISK OF SEVERE STORMS MAINLY OVER THE EASTERN 1/3RD TO 1/4TH. WITH
THE WARM MID LEVELS...THE MAIN SEVERE WEATHER THREAT WOULD BE
DAMAGING WINDS. HIGH PRECIPITABLE WATERS POOLED ALONG THE FRONT
WILL ALSO SUPPORT LOCALLY HEAVY RAINS WITH ANY STORMS THAT ARE ABLE
TO DEVELOP.
AFTER MIDNIGHT...TSRA CHANCE SHOULD BE LIMITED TO THE SOUTHERN
CWFA. TEMPERATURES TONIGHT SHOULD REACH INTO THE MID/UPPER 60S
NORTH WITH LOW TO MID 70S SOUTH CLOSER TO THE SURFACE BOUNDARY.
..DLF..
.LONG TERM...WEDNESDAY THROUGH MONDAY...
FORECAST FOCUS ON TREND TOWARD A ZONAL FLOW AND NEAR NORMAL EARLY
AUGUST TEMPERATURES. POTENTIAL FOR HEAVY RAIN STILL EXISTS THURSDAY
NIGHT.
WEDNESDAY...COLD FRONT WILL HAVE MOVED SOUTH TO THE OZARKS AS WEAK
HIGH PRESSURE SETTLES INTO THE REGION. SHOULD BE PLENTY OF SUNSHINE
AND TEMPERATURES WILL BE ABOUT 10 DEGREES COOLER COMPARED TO TODAY.
MAX TEMPS SHOULD RANGE FROM THE MID 80S NORTH TO ABOUT 90 SOUTH.
WITH DEWPOINTS IN THE LOWER 70S ESPECIALLY ALONG AND SOUTH OF I-80
HEAT INDEX VALUES WILL BE IN THE MID 90S OR SO.
THURSDAY AND FRIDAY...OPERATIONAL MODELS REMAIN SIMILAR IN BRINGING
A RATHER VIGOROUS SHORT WAVE COMING OUT OF THE ROCKIES RIGHT ACROSS
IA. THE FRONT WILL BE RETURNING NORTHWARD AND A SURFACE WAVE TRACKS
ALONG THE FRONT. DECENT WARM ADVECTION/LOW LEVEL CONVERGENCE AND
FORCING FROM A COMBINATION OF A STRENGTHENING LOW LEVEL JET AND THE
UPPER SHORT WAVE...THE MODELS CONTINUE TO HIGHLIGHT A POTENTIAL
HEAVY RAIN EVENT. SEVERAL INCHES OF RAINFALL IS POSSIBLE HOWEVER
STILL DIFFICULT TO DETERMINE EXACTLY WHERE IN OUR CWA THE HEAVIEST
RAIN AXIS WILL OCCUR. WITH THE RAIN/CLOUDS MAX TEMPS SHOULD END UP
IN THE 80S. IF THE RAIN LINGERS ON FRIDAY LONGER THAN EXPECTED THEN
OUR FAR NORTH MAY REMAIN IN THE 70S.
SATURDAY THROUGH MONDAY...ZONAL TO A BIT NORTHWEST FLOW THIS PERIOD
WITH TEMPERATURES TRENDING ABOUT NORMAL TO POSSIBLY A BIT BELOW AS
WE GET TO MONDAY. APPEARS THERE WILL BE RAIN CHANCES BUT TIMING THE
INDIVIDUAL SHORT WAVES IN THIS TYPE OF PATTERN IS TRICKY THIS FAR
OUT. FOR NOW WILL MAINTAIN SMALL POPS WITH THE IDEA THEY WILL BE
RAISED WHEN MODELS LATCH ONTO A BETTER TIMING.
NEXT WEEK...THE HOT WEATHER TAKES AN OVERDUE VACATION AS OPERATIONAL
MODELS SUGGESTING A PATTERN CHANGE TO A ZONAL TO NORTHWEST FLOW
ALOFT WHILE THE HEAT DOME GETS SHOVED INTO THE SOUTHERN ROCKIES.
THIS SHOULD KEEP TEMPERATURES NEAR TO A BIT BELOW NORMAL WITH NORMAL
TO A BIT ABOVE NORMAL RAINFALL ACROSS OUR REGION.
..HAASE..
&&
.AVIATION...
THE MAIN CONCERN FOR THE TAFS WILL BE THE TSRA POTENTIAL LATE THIS
AFTERNOON AND THIS EVENING. WITH THE UNCERTAINTY THAT THE CAP WILL
BREAK...HAVE USED A VCTS FOR ALL TAFS FROM LATE AFTERNOON INTO THE
EVENING. ANY STORMS THAT DO DEVELOP AND MOVE OVER THE TAF SITES
WILL LIKELY HAVE IFR CIGS/VSBYS IN HEAVY RAIN WAS WELL AS GUSTY
WINDS. SOUTHERLY WINDS COULD GUST IN EXCESS OF 20KTS TODAY THEN
WINDS WILL TURN TO THE NORTHWEST WITH THE FROPA. ..DLF..
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...HEAT ADVISORY UNTIL 10 PM CDT THIS EVENING FOR BENTON-BUCHANAN-
CLINTON-DELAWARE-DUBUQUE-JACKSON-JONES-LINN.
EXCESSIVE HEAT WARNING UNTIL 10 PM CDT THIS EVENING FOR CEDAR-
DES MOINES-HENRY IA-IOWA-JEFFERSON-JOHNSON-KEOKUK-LEE-
LOUISA-MUSCATINE-SCOTT-VAN BUREN-WASHINGTON.
IL...HEAT ADVISORY UNTIL 10 PM CDT THIS EVENING FOR CARROLL-JO
DAVIESS-STEPHENSON-WHITESIDE.
EXCESSIVE HEAT WARNING UNTIL 10 PM CDT THIS EVENING FOR BUREAU-
HANCOCK-HENDERSON-HENRY IL-MCDONOUGH-MERCER-PUTNAM-ROCK
ISLAND-WARREN.
MO...EXCESSIVE HEAT WARNING UNTIL 10 PM CDT THIS EVENING FOR CLARK-
SCOTLAND.
&&
DLF/HAASEHazardous weather outlook, Aug 1, 4:16 AM CDT, 23 hours 34 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 416 AM CDT MON AUG 1 2011 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-020930- 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- 416 AM CDT MON AUG 1 2011 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...TODAY AND TONIGHT HOT AND HUMID CONDITIONS WILL CONTINUE TODAY WITH AFTERNOON AND EARLY EVENING TEMPERATURES IN THE LOWER TO MIDDLE 90S AND HIGH DEW POINTS CREATING HEAT INDEX VALUES OF 100 TO 110. LOWS TONIGHT IN THE 70S WILL OFFER LITTLE RELIEF FROM THE HEAT. THE MISSISSIPPI RIVER IS EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY DANGEROUS HEAT AND HUMIDITY WILL EXIST ON TUESDAY WITH MAXIMUM TEMPERATURES SOARING WELL INTO THE 90S TO NEAR 100. DEW POINTS OF 75 TO 80 WILL CREATE HEAT INDEX VALUES OF AT LEAST 105 TO 115. AN EXCESSIVE HEAT WARNING MAY NEED TO BE ISSUED FOR TUESDAY. A COLD FRONT WILL BE MOVING THROUGH THE OUTLOOK AREA LATE AFTERNOON ON TUESDAY INTO TUESDAY NIGHT...INTO AN AIR MASS THAT WILL BE EXTREMELY UNSTABLE. HOWEVER A STRONG CAP WILL BE IN PLACE POTENTIALLY SUPPRESSING THUNDERSTORM DEVELOPMENT. IF THE CAP CAN BREAK THEN THERE WILL BE A CHANCE OF THUNDERSTORMS AHEAD OF THE FRONT WITH A SLIGHT RISK FOR SEVERE THUNDERSTORMS IN EASTERN IOWA AND NORTHWEST ILLINOIS. THE MAIN THREAT WILL BE DAMAGING WINDS IN EXCESS OF 80 MPH. A NEARLY STATIONARY FRONTAL BOUNDARY AND LOW PRESSURE MOVING ALONG THE FRONT MAY TRIGGER THUNDERSTORMS THURSDAY AND THURSDAY NIGHT. HEAVY RAIN IS POSSIBLE IN THE OUTLOOK AREA BUT THE LOCATION OF THE HEAVIEST RAIN IS DIFFICULT TO DETERMINE AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. DLF/HAASE
Nearby
Excessive Heat Warnings in Iowa, 2011Excessive Heat Warnings in Illinois, 2011Excessive Heat Warnings in Missouri, 2011Every excessive heat warning in 2011
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.