Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 152, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 8, 2012, 3:01 PM CDT for 4 counties in Iowa. It was in force for 43 min. 2 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 8, 2012, 3:01 PM CDT (20:01 UTC)
- Expired
- Aug 8, 2012, 3:44 PM CDT
- In force
- 43 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Boone County, IA, Dallas County, IA, Greene County, IA, Guthrie County, IA
The radar
The Des Moines radar (KDMX), 41 km from the middle of the area, began a volume at 20:03 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 8, 3:08 PM CDT | TSTM WND DMG | 5 Wnw Rippey, IA | DELAYED PUBLIC REPORT TO KCCI. TIME ESTIMATED FROM RADAR. MANY TREES DOWN IN SQUIRREL HOLLOW PARK...SOME DAMAGE TO PARK BRIDGE WITH FALLEN TREES. |
| Aug 8, 3:25 PM CDT | TSTM WND GST 60 | 3 Sse Beaver, IA | WIND WAS ACCOMPANIED BY PEA TO DIME HAIL |
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 8, 2:21 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.0 hours before the alert went out and 193 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
- 994 J/kg
- Mixed-layer CIN
- -254 J/kg
- Mixed-layer LCL
- 1661 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
507 WUUS53 KDMX 082001 SVRDMX IAC015-049-073-077-082045- /O.NEW.KDMX.SV.W.0152.120808T2001Z-120808T2045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 301 PM CDT WED AUG 8 2012 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN BOONE COUNTY IN CENTRAL IOWA... NORTHWESTERN DALLAS COUNTY IN CENTRAL IOWA... SOUTHEASTERN GREENE COUNTY IN WEST CENTRAL IOWA... NORTHEASTERN GUTHRIE COUNTY IN WEST CENTRAL IOWA... * UNTIL 345 PM CDT * AT 259 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF JEFFERSON TO GUTHRIE CENTER...AND MOVING EAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... PANORA...PERRY...YALE...JAMAICA...RIPPEY...DAWSON...BERKLEY AND PERRY AIRPORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU ARE IN A MOBILE HOME...GET OUT NOW...AND SEEK SHELTER IN A REINFORCED BUILDING. && LAT...LON 4206 9393 4170 9409 4164 9453 4194 9439 TIME...MOT...LOC 2001Z 255DEG 26KT 4194 9435 4165 9450 WIND...HAIL 60MPH 1.50IN $$
3 follow-up statements
729 WWUS53 KDMX 082024 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 324 PM CDT WED AUG 8 2012 IAC015-049-073-077-082045- /O.CON.KDMX.SV.W.0152.000000T0000Z-120808T2045Z/ GUTHRIE IA-GREENE IA-BOONE IA-DALLAS IA- 324 PM CDT WED AUG 8 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN DALLAS...SOUTHWESTERN BOONE...SOUTHEASTERN GREENE AND NORTHEASTERN GUTHRIE COUNTIES UNTIL 345 PM CDT... AT 320 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 9 MILES SOUTHWEST OF OGDEN TO PANORA...MOVING EAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... PERRY...BERKLEY AND PERRY AIRPORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4167 9439 4198 9425 4206 9393 4170 9409 TIME...MOT...LOC 2024Z 255DEG 26KT 4198 9413 4169 9429 WIND...HAIL 60MPH 1.00IN $$
907
WWUS53 KDMX 082036
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
336 PM CDT WED AUG 8 2012
IAC073-077-082044-
/O.CAN.KDMX.SV.W.0152.000000T0000Z-120808T2045Z/
GUTHRIE IA-GREENE IA-
336 PM CDT WED AUG 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREENE AND
NORTHEASTERN GUTHRIE COUNTIES IS CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.
LAT...LON 4186 9418 4186 9417 4189 9417 4202 9411
4206 9393 4170 9409 4168 9426
TIME...MOT...LOC 2034Z 255DEG 26KT 4200 9403 4171 9420
$$
IAC015-049-082045-
/O.CON.KDMX.SV.W.0152.000000T0000Z-120808T2045Z/
BOONE IA-DALLAS IA-
336 PM CDT WED AUG 8 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
DALLAS AND SOUTHWESTERN BOONE COUNTIES UNTIL 345 PM CDT...
AT 333 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM OGDEN TO 8 MILES EAST OF
PANORA...MOVING EAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE...
PERRY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS.
&&
LAT...LON 4186 9418 4186 9417 4189 9417 4202 9411
4206 9393 4170 9409 4168 9426
TIME...MOT...LOC 2034Z 255DEG 26KT 4200 9403 4171 9420
WIND...HAIL 60MPH 1.00IN
$$300
WWUS53 KDMX 082044
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
344 PM CDT WED AUG 8 2012
IAC015-049-082054-
/O.CAN.KDMX.SV.W.0152.000000T0000Z-120808T2045Z/
BOONE IA-DALLAS IA-
344 PM CDT WED AUG 8 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DALLAS AND
SOUTHWESTERN BOONE COUNTIES IS CANCELLED...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY. HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH
THESE THUNDERSTORMS.
LAT...LON 4186 9418 4186 9417 4189 9417 4202 9411
4206 9393 4170 9409 4168 9426
TIME...MOT...LOC 2044Z 255DEG 26KT 4202 9393 4173 9411
$$The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 7:45 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass | 45 min |
| Aug 8, 2:00 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene | 45 min |
| Aug 8, 2:37 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 53 min |
| Aug 8, 3:09 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 51 min |
| Aug 8, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Story | 30 min |
| Aug 8, 3:54 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 38 min |
| Aug 8, 4:16 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 29 min |
| Aug 8, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Winnebago | 36 min |
| Aug 8, 4:48 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 27 min |
| Aug 8, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin | 25 min |
| Aug 8, 6:29 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 46 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.