Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 72, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 4, 2012, 12:05 PM CDT for 8 counties in Iowa. It was in force for 55 min. 18 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
- Aug 4, 2012, 12:05 PM CDT (17:05 UTC)
- Expired
- Aug 4, 2012, 1:00 PM CDT
- In force
- 55 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Benton County, IA, Buchanan County, IA, Delaware County, IA, Iowa County, IA, Johnson County, IA, Keokuk County, IA, Linn County, IA, Washington County, IA
The radar
The Quad Cities radar (KDVN), 112 km from the middle of the area, began a volume at 17:05 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 |
|---|---|---|---|
| Aug 4, 12:25 PM CDT | TSTM WND DMG | Frytown, IA | TREES DOWN AND WINDOWS BLOWN OUT OF A RESIDENCE. A GRAIN BIN IS ALSO REPORTED DOWN. DELAYED REPORT. |
| Aug 4, 12:25 PM CDT | TSTM WND GST 65 | W Norway, IA | SPOTTER ESTIMATED SUSTAINED 40 GUST 60-70 MPH. |
| Aug 4, 12:28 PM CDT | TSTM WND GST 65 | W Norway, IA | WINDS ESTIMATED AT 60 TO 65 MPH WITH HEAVY RAIN WITH VISIBILITY OF A QUARTER OF A MILE OR LESS. |
| Aug 4, 12:35 PM CDT | TSTM WND DMG | 5 Nw Iowa City, IA | 3 INCH DIAMETER TREE BRANCH DOWN ON HOME. NUMEROUS SMALLER BRANCHES DOWN. |
| Aug 4, 12:35 PM CDT | TSTM WND GST 60 | 5 Nw Iowa City, IA | |
| Aug 4, 12:36 PM CDT | TSTM WND GST 60 | 3 Wnw Iowa City, IA | A TRAINED SPOTTER REPORTED ESTIMATED WIND GUSTS OF 50 TO 60 MPH. |
| Aug 4, 12:38 PM CDT | TSTM WND GST 72 | Cedar Rapids Municipal, IA | MEASURED FROM ASOS. |
| Aug 4, 12:38 PM CDT | TSTM WND GST 72 | Cedar Rapids Municipal, IA | |
| Aug 4, 12:40 PM CDT | TSTM WND GST 60 | 1 Sse Cedar Rapids, IA | A TRAINED SPOTTER ESTIMATED WINDS OF 50 TO 60 MPH. |
| Aug 4, 12:47 PM CDT | TSTM WND GST 60 | 1 Sse Cedar Rapids, IA | |
| Aug 4, 12:47 PM CDT | TSTM WND GST 65 | 5 Nne Cedar Rapids, IA | A TRAINED SPOTTER ESTIMATED THUNDERSTORM WINDS OF 06 TO 65 MPH. |
| Aug 4, 12:47 PM CDT | TSTM WND GST 73 | Cedar Rapids Municipal, IA | |
| Aug 4, 12:47 PM CDT | TSTM WND GST 75 | 1 Sse Cedar Rapids, IA | A TRAINED SPOTTER ESTIMATED WINDS OF 70 TO 75 MPH. |
| Aug 4, 12:48 PM CDT | TSTM WND DMG | 1 Sw Cedar Rapids, IA | A TRAINED SPOTTER REPORTED 3 TO 4 INCH DIAMETER TREE LIMBS DOWN. ESTIMATED WIND GUSTS OF 70 TO 75 MPH. |
| Aug 4, 12:48 PM CDT | TSTM WND DMG | 2 Nnw North Liberty, IA | ALUMINUM FLAG POLE SNAPPED AND SEVERAL TREES DAMAGED. |
| Aug 4, 12:48 PM CDT | TSTM WND GST 65 | 2 Nnw North Liberty, IA | ESTIMATED 60 TO 65 MPH. |
| Aug 4, 12:48 PM CDT | TSTM WND GST 70 | Ely, IA | ESTIMATED WINDS OF 60 TO 70 MPH. HEAVY RAIN IS REDUCING VISIBILITY. |
| Aug 4, 12:55 PM CDT | TSTM WND DMG | 1 Sse Cedar Rapids, IA | SPOTTER REPORT OF 12 INCH TREE TOWN. REPORT WAS DELAYED. |
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 |
|---|---|---|---|
| Aug 4, 10:50 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 5.1 hours before the alert went out and 119 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
- 1247 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
483
WUUS53 KDVN 041705
SVRDVN
IAC011-019-055-095-103-107-113-183-041800-
/O.NEW.KDVN.SV.W.0072.120804T1705Z-120804T1800Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1205 PM CDT SAT AUG 4 2012
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
BENTON COUNTY IN EAST CENTRAL IOWA...
IOWA COUNTY IN EAST CENTRAL IOWA...
JOHNSON COUNTY IN EAST CENTRAL IOWA...
LINN COUNTY IN EAST CENTRAL IOWA...
SOUTHERN BUCHANAN COUNTY IN NORTHEAST IOWA...
SOUTHWESTERN DELAWARE COUNTY IN NORTHEAST IOWA...
KEOKUK COUNTY IN SOUTHEAST IOWA...
WASHINGTON COUNTY IN SOUTHEAST IOWA...
* UNTIL 100 PM CDT.
* AT 1201 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS
AROUND 60 MPH. THESE STORMS WERE LOCATED APPROXIMATELY ALONG A
LINE EXTENDING FROM 10 MILES WEST OF MOUNT AUBURN TO RICHLAND...OR
ALONG A LINE EXTENDING FROM 15 MILES SOUTH OF WATERLOO TO 15 MILES
NORTH OF FAIRFIELD...AND MOVING EAST AT 30 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
KINROSS...PARNELL...MARENGO...WILLIAMSBURG...BLAIRSTOWN...
GARRISON...VAN HORNE...CONROY...BRIGHTON...WELLMAN...VINTON...
COPPOCK...NEWHALL...NORWAY...AMANA...WASHINGTON...WALFORD...
OXFORD...RICHMOND...KALONA...ATKINS...SHELLSBURG...FAIRFAX...
URBANA...CRAWFORDSVILLE...PALO...AINSWORTH...TIFFIN...SWISHER...
RIVERSIDE...CENTER POINT...WALKER...CORALVILLE...SHUEYVILLE...
OAKDALE...NORTH LIBERTY...TODDVILLE...CEDAR RAPIDS...HIAWATHA...
HILLS...UNIVERSITY HEIGHTS...ROBINS...IOWA CITY...ELY...LAKE
MACBRIDE STATE PARK...SOLON...LONE TREE...WHITTIER...WAUBEEK...
VIOLA...TROY MILLS...SPRINGVILLE...PRAIRIEBURG...PARIS...MOUNT
VERNON...MARION...LISBON...COGGON...CENTRAL CITY...BERTRAM AND
ALBURNETT.
THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 205 AND 253.
THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 1 AND 49.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.
&&
LAT...LON 4151 9238 4152 9230 4230 9230 4230 9135
4230 9136 4142 9137 4142 9148 4116 9149
4117 9241
TIME...MOT...LOC 1705Z 276DEG 28KT 4228 9225 4122 9191
WIND...HAIL 60MPH <1.00IN
$$
NICHOLS2 follow-up statements
773
WWUS53 KDVN 041721
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1221 PM CDT SAT AUG 4 2012
IAC107-041730-
/O.CAN.KDVN.SV.W.0072.000000T0000Z-120804T1800Z/
KEOKUK IA-
1221 PM CDT SAT AUG 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR KEOKUK COUNTY IS CANCELLED...
THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS
MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM
WARNING HAS BEEN CANCELLED.
HOWEVER...THIS STORM IS STILL CAPABLE OF PRODUCING GUSTY WINDS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
SATURDAY AFTERNOON FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
LAT...LON 4230 9136 4142 9137 4142 9148 4116 9149
4116 9188 4182 9198 4230 9229
TIME...MOT...LOC 1720Z 276DEG 28KT 4227 9209 4121 9176
$$
IAC011-019-095-103-113-183-041800-
/O.CON.KDVN.SV.W.0072.000000T0000Z-120804T1800Z/
WASHINGTON IA-LINN IA-JOHNSON IA-IOWA IA-BENTON IA-BUCHANAN IA-
1221 PM CDT SAT AUG 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR SOUTHERN BUCHANAN...BENTON...EASTERN IOWA...JOHNSON...LINN AND
WASHINGTON COUNTIES...
AT 1219 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS AROUND 60 MPH. THESE STORMS WERE LOCATED APPROXIMATELY ALONG A
LINE EXTENDING FROM MOUNT AUBURN TO BRIGHTON...OR ALONG A LINE
EXTENDING FROM 8 MILES NORTHWEST OF VINTON TO 8 MILES SOUTHWEST OF
WASHINGTON...MOVING EAST AT 30 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
NEWHALL...COPPOCK...VINTON MEMORIAL AIRPORT...MIDDLE AMANA...
NORWAY...HOMESTEAD...AMANA...AMISH...EAST AMANA...WASHINGTON
AIRPORT...WINDHAM...WALFORD...OXFORD...RICHMOND...FRYTOWN...NOBLE...
ATKINS...KALONA...CHENEY...COSGROVE...SHELLSBURG...KENT COUNTY
PARK...URBANA...FAIRFAX...SHARON CENTER...SPENCERS GROVE...
CRAWFORDSVILLE...PALO...AINSWORTH...TIFFIN...CEDAR RAPIDS MUNICIPAL
AIRPORT...SWISHER...HASKINS...RIVERSIDE...COU FALLS...CENTER POINT...
WALKER...CORALVILLE...SHUEYVILLE...OAKDALE...NORTH LIBERTY...
TODDVILLE...CEDAR RAPIDS...HIAWATHA...HILLS...UNIVERSITY HEIGHTS...
MIDWAY...IOWA CITY MUNICIPAL AIRPORT...RIVER JUNCTION...SANDY BEACH
CAMP GROUND...ROBINS...UNIVERSITY OF IOWA...IOWA CITY...LAFAYETTE...
SUGAR BOTTOM CAMP GROUND...TWIN VIEW HEIGHTS...ELY...TROY MILLS...
LAKE MACBRIDE STATE PARK...WEST OVERLOOK...NEWPORT...SUTLIFF...
SOLON...OASIS...MORSE...LONE TREE...ELMIRA...WHITTIER...WAUBEEK...
VIOLA...SPRINGVILLE...PRAIRIEBURG...PARIS...PARALTA...
PALISADES-KEPLER SATE PARK...MOUNT VERNON...MARION AIRPORT...
MARION...LISBON...COGGON...CENTRAL CITY...BERTRAM AND ALBURNETT.
THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 223 AND 253.
THIS INCLUDES INTERSTATE 380 BETWEEN MILE MARKERS 1 AND 49.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
SATURDAY AFTERNOON FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
&&
LAT...LON 4230 9136 4142 9137 4142 9148 4116 9149
4116 9188 4182 9198 4230 9229
TIME...MOT...LOC 1720Z 276DEG 28KT 4227 9209 4121 9176
WIND...HAIL 60MPH <1.00IN
$$200
WWUS53 KDVN 041800
SVSDVN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
100 PM CDT SAT AUG 4 2012
IAC011-019-095-103-113-183-041811-
/O.EXP.KDVN.SV.W.0072.000000T0000Z-120804T1800Z/
WASHINGTON IA-LINN IA-JOHNSON IA-IOWA IA-BENTON IA-BUCHANAN IA-
100 PM CDT SAT AUG 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BUCHANAN...
NORTHEASTERN BENTON...EASTERN IOWA...JOHNSON...LINN AND WASHINGTON
COUNTIES HAS EXPIRED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT
SATURDAY AFTERNOON FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS.
LAT...LON 4230 9136 4142 9137 4142 9148 4116 9149
4116 9188 4182 9198 4230 9229
TIME...MOT...LOC 1721Z 276DEG 28KT 4227 9208 4121 9175
$$
NICHOLSThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 11:18 AM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Henry, Iowa, Jefferson and 4 more | 102 min |
| Aug 4, 12:38 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Delaware, Dubuque, Jackson, Johnson and 5 more | 67 min |
| Aug 4, 12:59 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa, Muscatine, Scott | 76 min |
| Aug 4, 1:19 PM CDT | Flash Flood Warning | DVN | Linn | 82 min |
| Aug 4, 1:39 PM CDT | Flash Flood Warning | DVN | Scott | 70 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.