Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 4, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 31, 2012, 9:09 PM CDT for 4 counties in Iowa. It was in force for 66 min. 6 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, 9:09 PM CDT (02:09 UTC)
- Expired
- Mar 31, 2012, 10:15 PM CDT
- In force
- 66 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, Jones County, IA, Linn County, IA
The radar
The Quad Cities radar (KDVN), 52 km from the middle of the area, began a volume at 02:11 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, 9:50 PM CDT | HAIL 2.5 | Clarence, IA | TIME ESTIMATED FROM RADAR. SPOTTER REPORTED HAIL AT HIS LOCATION FROM 950 THROUGH 1020 PM. |
| Mar 31, 9:51 PM CDT | HAIL 1.25 | 1 E Clarence, IA | SILVER DOLLAR TO QUARTER SIZED HAIL ABOUT 1 MILE EAST OF CLARENCE. BE69. |
| Mar 31, 9:55 PM CDT | HAIL 1 | Lowden, IA | |
| Mar 31, 9:55 PM CDT | HAIL 1.75 | Clarence, IA | UP TO GOLF BALL SIZED HAIL. TIME ESTIMATED. HAIL LASTED FOR 5 TO 7 MINUTES. RELAYED BY TRAINED SPOTTER. |
| Mar 31, 10:03 PM CDT | HAIL 1.25 | 1 Se Lowden, IA | HALF DOLLAR SIZED HAIL. TN SPOTTER. |
| Mar 31, 10:08 PM CDT | HAIL 0.25 | Stanwood, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 2.2 hours before the alert went out and 56 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.
619 WUUS53 KDVN 010209 SVRDVN IAC031-045-105-113-010315- /O.NEW.KDVN.SV.W.0004.120401T0209Z-120401T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 909 PM CDT SAT MAR 31 2012 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CEDAR COUNTY IN EAST CENTRAL IOWA... WEST CENTRAL CLINTON COUNTY IN EAST CENTRAL IOWA... SOUTHERN JONES COUNTY IN EAST CENTRAL IOWA... EAST CENTRAL LINN COUNTY IN EAST CENTRAL IOWA... * UNTIL 1015 PM CDT. * AT 905 PM CDT...TRAINED SPOTTERS AND DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR MARTELLE...OR 8 MILES SOUTHWEST OF ANAMOSA...AND MOVING EAST AT 30 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MORLEY...MECHANICSVILLE...OLIN...STANWOOD...CLARENCE...OXFORD JUNCTION...LOWDEN...TORONTO AND WHEATLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY FROM WINDOWS. PLEASE REPORT ANY SEVERE WEATHER OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE. && LAT...LON 4194 9070 4178 9089 4196 9143 4210 9135 TIME...MOT...LOC 0209Z 287DEG 28KT 4200 9134 WIND...HAIL <58MPH 1.00IN $$ ERVIN
3 follow-up statements
368 WWUS53 KDVN 010220 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 920 PM CDT SAT MAR 31 2012 IAC031-045-105-113-010315- /O.CON.KDVN.SV.W.0004.000000T0000Z-120401T0315Z/ LINN IA-CEDAR IA-CLINTON IA-JONES IA- 920 PM CDT SAT MAR 31 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR SOUTHERN JONES...WEST CENTRAL CLINTON...NORTHERN CEDAR AND EAST CENTRAL LINN COUNTIES... AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED APPROXIMATELY NEAR MORLEY...OR NEAR MECHANICSVILLE...MOVING EAST AT 30 MPH. ANOTHER SEVERE STORM IS LOCATED OVER WESTERN LINN COUNTY AND WILL POSSIBLY APPROACH THE WARNING AREA AFTER 945 PM. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OLIN... STANWOOD...HALE...CLARENCE...OXFORD JUNCTION...OXFORD MILLS... LOWDEN...TORONTO...LOST NATION AND WHEATLAND. && LAT...LON 4194 9070 4178 9089 4196 9143 4210 9135 TIME...MOT...LOC 0220Z 287DEG 28KT 4197 9123 WIND...HAIL <58MPH 1.00IN $$ ERVIN
709 WWUS53 KDVN 010228 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 928 PM CDT SAT MAR 31 2012 IAC031-045-105-113-010315- /O.CON.KDVN.SV.W.0004.000000T0000Z-120401T0315Z/ LINN IA-CEDAR IA-CLINTON IA-JONES IA- 928 PM CDT SAT MAR 31 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR SOUTHERN JONES...WEST CENTRAL CLINTON...NORTHERN CEDAR AND EAST CENTRAL LINN COUNTIES... AT 924 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 OLIN...OR NEAR MECHANICSVILLE...MOVING EAST AT 30 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STANWOOD...HALE...CLARENCE...OXFORD JUNCTION...OXFORD MILLS... LOWDEN...TORONTO...LOST NATION AND WHEATLAND. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS ALREADY PRODUCED LARGE HAIL...AND IT REMAINS A THREAT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS. && LAT...LON 4194 9070 4178 9089 4196 9143 4210 9135 TIME...MOT...LOC 0228Z 289DEG 24KT 4195 9116 WIND...HAIL <58MPH 1.00IN $$ ERVIN
395 WWUS53 KDVN 010311 SVSDVN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1011 PM CDT SAT MAR 31 2012 IAC031-045-105-113-010320- /O.EXP.KDVN.SV.W.0004.000000T0000Z-120401T0315Z/ LINN IA-CEDAR IA-CLINTON IA-JONES IA- 1011 PM CDT SAT MAR 31 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JONES...WEST CENTRAL CLINTON...NORTHERN CEDAR AND EAST CENTRAL LINN COUNTIES WILL EXPIRE AT 1015 PM CDT... A NEW SEVERE THUNDERSTORM WARNING HAS REPLACED THE WARNING FOR NORTHERN CEDAR...WESTERN CLINTON...AND SOUTHERN JONES COUNTY AND REMAINS IN EFFECT UNTIL 1045 PM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT SUNDAY MORNING FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS. LAT...LON 4194 9070 4178 9089 4196 9143 4210 9135 TIME...MOT...LOC 0310Z 289DEG 24KT 4186 9080 $$ ERVIN
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 10:17 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Scott | 58 min |
| Mar 31, 11:51 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 54 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 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.