Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 31, 2012, 10:17 PM CDT for Cedar County, Clinton County, Scott County, Iowa; Rock Island County, Illinois. It was in force for 58 min. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Mar 31, 2012, 10:17 PM CDT (03:17 UTC)
- Expired
- Mar 31, 2012, 11:15 PM CDT
- In force
- 58 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 58.0 mph
Counties Cedar County, IA, Clinton County, IA, Scott County, IA, Rock Island County, IL
The radar
The Quad Cities radar (KDVN), 2 km from the middle of the area, began a volume at 03:20 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 |
|---|---|---|---|
| Mar 31, 10:33 PM CDT | HAIL 1 | Wheatland, IA | DIME TO QUARTER SIZED HAIL. RELAYED BY LAW ENFORECEMENT. |
| Mar 31, 10:39 PM CDT | HAIL 0.25 | 4 Nne Davenport, IA | LASTED ABOUT 2 TO 5 MINUTES. |
| Mar 31, 10:44 PM CDT | HAIL 0.25 | Eldridge, IA | PEA SIZED HAIL. |
| Mar 31, 10:48 PM CDT | HAIL 0.25 | 5 Nw Davenport, IA | |
| Mar 31, 10:58 PM CDT | HAIL 0.5 | 5 N Davenport, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 31, 9:24 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 7 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1520 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
701
WUUS53 KDVN 010317
SVRDVN
IAC031-045-163-ILC161-010415-
/O.NEW.KDVN.SV.W.0007.120401T0317Z-120401T0415Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1017 PM CDT SAT MAR 31 2012
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN CEDAR COUNTY IN EAST CENTRAL IOWA...
SOUTHWESTERN CLINTON COUNTY IN EAST CENTRAL IOWA...
SCOTT COUNTY IN EAST CENTRAL IOWA...
ROCK ISLAND COUNTY IN NORTHWEST ILLINOIS...
* UNTIL 1115 PM CDT.
* AT 1012 PM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED APPROXIMATELY NEAR DONAHUE...OR 12 MILES
NORTHEAST OF DURANT...AND MOVING SOUTHEAST AT 35 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WALCOTT...LONG GROVE...ELDRIDGE...DAVENPORT...ROCK ISLAND...
BETTENDORF...MILAN...PRINCETON...OAK GROVE...RIVERDALE...MOLINE...
CORDOVA...HAMPTON...LE CLAIRE...EAST MOLINE...PORT BYRON...
SILVIS...RAPIDS CITY...COAL VALLEY AND OSBORN.
THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 279 AND 306.
THIS INCLUDES INTERSTATE 80 IN ILLINOIS BETWEEN MILE MARKERS 1 AND 4.
THIS INCLUDES INTERSTATE 74 IN IOWA BETWEEN MILE MARKERS 1 AND 5.
THIS INCLUDES INTERSTATE 74 IN ILLINOIS BETWEEN MILE MARKERS 2 AND 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS ALREADY PRODUCED LARGE HAIL...AND IT REMAINS A THREAT.
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4160 9016 4152 9028 4151 9036 4148 9038
4146 9043 4140 9043 4133 9053 4155 9079
4159 9078 4160 9085 4179 9107 4195 9093
4195 9090
TIME...MOT...LOC 0317Z 302DEG 32KT 4172 9071
WIND...HAIL <58MPH 1.00IN
$$
ERVIN3 follow-up statements
625
WWUS53 KDVN 010334
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1034 PM CDT SAT MAR 31 2012
IAC031-045-163-ILC161-010415-
/O.CON.KDVN.SV.W.0007.000000T0000Z-120401T0415Z/
SCOTT IA-CEDAR IA-CLINTON IA-ROCK ISLAND IL-
1034 PM CDT SAT MAR 31 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR EASTERN ROCK ISLAND...SOUTHWESTERN CLINTON...NORTHEASTERN CEDAR
AND SCOTT COUNTIES...
AT 1033 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR DONAHUE...OR 11
MILES NORTHWEST OF DAVENPORT...MOVING SOUTHEAST AT 30 MPH. QUARTER
SIZE HAIL WAS REPORTED IN WHEATLAND AT 1033 PM.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LONG
GROVE...ELDRIDGE...SCOTT COUNTY PARK...PARK VIEW...WEST LAKE PARK...
DAVENPORT MUNICIPAL AIRPORT...CREDIT ISLAND...ROCK ISLAND...ROCK
ISLAND ARSENAL...BLACKHAWK STATE PARK...BETTENDORF...MILAN...
PRINCETON...PANORAMA PARK...RIVERDALE...OAK
GROVE...FRUITLAND...PLEASANT VALLEY...MOLINE QUAD-CITY
AIRPORT...EAST MOLINE...
THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 279 AND 306.
THIS INCLUDES INTERSTATE 80 IN ILLINOIS BETWEEN MILE MARKERS 1 AND 4.
THIS INCLUDES INTERSTATE 74 IN IOWA BETWEEN MILE MARKERS 1 AND 5.
THIS INCLUDES INTERSTATE 74 IN ILLINOIS BETWEEN MILE MARKERS 2 AND 3.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS ALREADY PRODUCED LARGE HAIL...AND IT REMAINS A THREAT.
PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.
THIS STORM IS ALSO PRODUCING FREQUENT AND DANGEROUS LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4160 9016 4152 9028 4151 9036 4148 9038
4146 9043 4140 9043 4133 9053 4155 9079
4159 9078 4160 9085 4179 9107 4195 9093
4195 9090
TIME...MOT...LOC 0333Z 302DEG 27KT 4169 9065
WIND...HAIL <58MPH 1.00IN
$$
ERVIN499
WWUS53 KDVN 010348
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1048 PM CDT SAT MAR 31 2012
IAC031-045-163-ILC161-010415-
/O.CON.KDVN.SV.W.0007.000000T0000Z-120401T0415Z/
SCOTT IA-CEDAR IA-CLINTON IA-ROCK ISLAND IL-
1048 PM CDT SAT MAR 31 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR EASTERN ROCK ISLAND...SOUTHWESTERN CLINTON...NORTHEASTERN CEDAR
AND SCOTT COUNTIES...
AT 1042 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR DIXON...OR 14 MILES
NORTHEAST OF DURANT...MOVING SOUTHEAST AT 20 MPH. A CLUSTER OF
STORMS PRODUCING HAIL BETWEEN THE SIZE OF PENNIES AND QUARTERS WAS
LOCATED OVER SCOTT AND WESTERN CLINTON COUNTIES.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WALCOTT...DONAHUE...MAYSVILLE...LONG GROVE...SCOTT COUNTY PARK...
ELDRIDGE...PARK VIEW...DAVENPORT MUNICIPAL AIRPORT...WEST LAKE
PARK...ROCK ISLAND ARSENAL...BARSTOW...PLEASANT VALLEY...SILVIS
HEIGHTS...SILVIS...ROCK ISLAND...RAPIDS CITY...PORT BYRON...OAK
GROVE...MOLINE...MILAN......DAVENPORT...CREDIT ISLAND...BETTENDORF
AND CAMPBELLS ISLAND.
THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 279 AND 306.
THIS INCLUDES INTERSTATE 80 IN ILLINOIS BETWEEN MILE MARKERS 1 AND 4.
THIS INCLUDES INTERSTATE 74 IN IOWA BETWEEN MILE MARKERS 1 AND 5.
THIS INCLUDES INTERSTATE 74 IN ILLINOIS BETWEEN MILE MARKERS 2 AND 3.
THIS INCLUDES INTERSTATE 280 BETWEEN MILE MARKERS 1 AND 18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4160 9016 4152 9028 4151 9036 4148 9038
4146 9043 4140 9043 4133 9053 4155 9079
4159 9078 4160 9085 4179 9107 4195 9093
4195 9090
TIME...MOT...LOC 0347Z 307DEG 19KT 4172 9069
WIND...HAIL <58MPH 1.00IN
$$
ERVIN782
WWUS53 KDVN 010410
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1110 PM CDT SAT MAR 31 2012
IAC031-045-163-ILC161-010420-
/O.EXP.KDVN.SV.W.0007.000000T0000Z-120401T0415Z/
SCOTT IA-CEDAR IA-CLINTON IA-ROCK ISLAND IL-
1110 PM CDT SAT MAR 31 2012
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ROCK ISLAND...
SOUTHWESTERN CLINTON...NORTHEASTERN CEDAR AND SCOTT COUNTIES WILL
EXPIRE AT 1115 PM CDT...
THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS
WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED
TO EXPIRE.
HOWEVER...THIS CLUSTER OF STRONG STORMS IS STILL CAPABLE OF
PRODUCING VERY HEAVY RAIN...SMALL HAIL...AND FREQUENT CLOUD TO
GROUND LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY
MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
LAT...LON 4160 9016 4152 9028 4151 9036 4148 9038
4146 9043 4140 9043 4133 9053 4155 9079
4159 9078 4160 9085 4179 9107 4195 9093
4195 9090
TIME...MOT...LOC 0410Z 307DEG 19KT 4165 9056
$$
ERVINThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 9:09 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jones, Linn | 66 min |
| Mar 31, 9:12 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Jones, Linn | 63 min |
| Mar 31, 9:39 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jones, Scott | 66 min |
| Mar 31, 11:51 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 54 min |
| Apr 1, 12:26 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer, Rock Island | 64 min |
| Apr 1, 1:19 AM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 27 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2012Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012
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.