Alert archive / Iowa / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 141, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 9, 2010, 12:35 AM CDT for 7 counties in Iowa. It was in force for 55 min. 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 9, 2010, 12:35 AM CDT (05:35 UTC)
- Expired
- Aug 9, 2010, 1:30 AM CDT
- In force
- 55 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Jackson County, IA, Jones County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 70 km from the middle of the area, began a volume at 05:39 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 8, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 5.6 hours before the alert went out and 73 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
- 3512 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 3.2
- Supercell composite
- 27.1
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 8, 3:30 PM CDT, 9 hours 5 minutes earlier.
Area forecast discussion, Aug 8, 3:30 PM CDT, 9 hours 5 minutes before
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</html>Hazardous weather outlook, Aug 8, 8:32 PM CDT, 4 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 832 PM CDT SUN AUG 8 2010 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-100145- 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- 832 PM CDT SUN AUG 8 2010 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...TONIGHT A THUNDERSTORM COMPLEX OVER NORTHWEST IOWA IS EXPECTED TO MOVE INTO EASTERN IOWA MAINLY ALONG AND NORTH OF INTERSTATE 80 JUST AFTER 10 PM. THESE STORMS WILL BRING THE THREAT OF DAMAGING WINDS OF 60 TO 70 MPH AS THEY MOVE EASTWARD INTO EARLY MONDAY MORNING. IN ADDITION...VERY HEAVY RAIN WITH RATES IN EXCESS OF AN INCH IN LESS THAN AN HOUR WILL BRING THE RISK FOR MINOR FLOODING OF LOW LYING AREAS WITH RISES ON STREAMS AND CREEKS. THE PORTION OF THE OUTLOOK AREA NORTH OF HIGHWAY 34 IN BOTH IOWA AND ILLINOIS... IS MOST AT RISK FOR SEEING SEVERE WEATHER LATE THIS EVENING AND OVERNIGHT FROM 10 PM UNTIL ROUGHLY 2 AM. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY MONDAY THROUGH SATURDAY...THERE WILL BE A CHANCE OF THUNDERSTORMS EACH DAY. CONDITIONS AT THIS TIME DO NOT SUPPORT A SIGNIFICANT SEVERE RISK THROUGHOUT THIS TIME PERIOD. THE PRIMARY THREAT WITH ANY STORMS WILL BE TORRENTIAL HEAVY RAINS AND THE RISK OF LOCALIZED FLASH FLOODING. ISOLATED STRONG GUSTY WINDS WILL BE A SECONDARY THREAT IN THE AFTERNOON AND EARLY EVENING HOURS. MONDAY INTO WEDNESDAY...HOT AND HUMID CONDITIONS...MAINLY SOUTH OF THE I-80 CORRIDOR...WILL PRODUCE HEAT INDICES OF 100 UP TO NEAR 105 DEGREES ACROSS MUCH OF THE OUTLOOK AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING INTO THE OVERNIGHT MAINLY ACROSS THE NORTHERN HALF OF THE OUTLOOK AREA.
In the hours before
Special weather statement, Aug 8, 9:19 PM CDT, 3 hours 16 minutes before
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</html>Special weather statement, Aug 8, 11:23 PM CDT, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1123 PM CDT SUN AUG 8 2010
IAZ040>042-051>053-063>065-067-090515-
BENTON-BUCHANAN-CEDAR-DELAWARE-DUBUQUE-IOWA-JOHNSON-JONES-LINN-
MUSCATINE-
1123 PM CDT SUN AUG 8 2010
...STRONG THUNDERSTORMS MOVING IN...
AT 1115 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST OF
JESUP TO 13 MILES WEST OF VICTOR...MOVING EAST AT 40 MPH. STRONG
WINDS OF 25 TO 40 MPH WITH ISOLATED HIGHER GUSTS AROUND 50 MPH WILL
ACCOMPANY THIS LINE OF STORMS. IN ADDITION...TORRENTIAL RAIN WILL
ALSO OCCUR WITH RAINFALL AMOUNTS OF 1 TO 1.5 INCHES POSSIBLE IN
30 MINUTES. THIS WILL CAUSE MINOR FLOODING OF LOW LYING AREAS...
PONDING OF WATER ON ROADWAYS... AND RISES ON STREAMS AND CREEKS.
* THUNDERSTORMS WILL BE NEAR...
HAZLETON...VICTOR...MOUNT AUBURN AND KEYSTONE AROUND 1130 PM CDT...
LADORA...VINTON...VAN HORNE AND CEDAR RAPIDS AROUND 1145 PM CDT...
LAMONT...AURORA AND MANCHESTER AROUND 1135 PM CDT...
SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT MONDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
LAT...LON 4153 9128 4153 9231 4229 9231 4230 9207
4246 9207 4247 9209 4264 9208 4265 9112
TIME...MOT...LOC 0418Z 275DEG 35KT 4258 9209 4175 9248Local storm report, Aug 8, 11:45 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1145 PM CDT SUN AUG 08 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1141 PM TSTM WND GST 3 SE KEYSTONE 41.97N 92.15W
08/08/2010 M54 MPH BENTON IA TRAINED SPOTTER
&&
TGLocal storm report, Aug 8, 11:53 PM CDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1153 PM CDT SUN AUG 08 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1141 PM TSTM WND GST 3 SE KEYSTONE 41.97N 92.15W
08/08/2010 M59 MPH BENTON IA TRAINED SPOTTER
&&
TGThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 11:23 PM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Iowa, Johnson, Linn | 52 min |
| Aug 8, 11:37 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Linn | 53 min |
| Aug 9, 3:51 AM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 17 hr |
| Aug 9, 3:57 AM CDT | Special Weather Statement | DVN | Iowa, Johnson, Keokuk, Washington | 93 min |
| Aug 9, 4:52 AM CDT | Special Weather Statement | DVN | Henry, Jefferson, Lee, Van Buren | 83 min |
| Aug 9, 10:39 AM CDT | River Flood Warning | DVN | Lee, Van Buren | 8 days |
| Aug 9, 12:03 PM CDT | Heat Advisory | DVN | Des Moines, Henry, Jefferson, Lee, Van Buren | 8 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 2010Every severe thunderstorm warning in 2010
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.