Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 7, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Mar 29, 2012, 10:49 PM CDT for Decatur County, Ringgold County, Iowa. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2012, 10:49 PM CDT (03:49 UTC)
- Expired
- Mar 29, 2012, 11:30 PM CDT
- In force
- 41 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Decatur County, IA, Ringgold County, IA
The radar
The Des Moines radar (KDMX), 119 km from the middle of the area, began a volume at 03:51 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 |
|---|---|---|---|
| Mar 29, 8:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.8 hours before the alert went out and 198 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
- 761 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 647 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
882
WUUS53 KDMX 300349
SVRDMX
IAC053-159-300430-
/O.NEW.KDMX.SV.W.0007.120330T0349Z-120330T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1049 PM CDT THU MAR 29 2012
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN DECATUR COUNTY IN SOUTH CENTRAL IOWA...
SOUTHERN RINGGOLD COUNTY IN SOUTH CENTRAL IOWA...
* UNTIL 1130 PM CDT
* AT 1047 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES
SOUTHWEST OF MOUNT AYR...OR 20 MILES WEST OF LAMONI...AND MOVING
EAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
LAMONI...MOUNT AYR...KELLERTON...BEACONSFIELD...LAMONI AIRPORT AND
GRAND RIVER.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 1 AND 8.
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 4067 9443 4090 9397 4090 9386 4057 9383
4056 9438
TIME...MOT...LOC 0349Z 249DEG 37KT 4064 9428
WIND...HAIL 60MPH 1.00IN
$$
DONAVON2 follow-up statements
159
WWUS53 KDMX 300403
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1103 PM CDT THU MAR 29 2012
IAC053-159-300430-
/O.CON.KDMX.SV.W.0007.000000T0000Z-120330T0430Z/
RINGGOLD IA-DECATUR IA-
1103 PM CDT THU MAR 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
DECATUR AND SOUTHEASTERN RINGGOLD COUNTIES UNTIL 1130 PM CDT...
AT 1100 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
SOUTHEAST OF MOUNT AYR...OR 11 MILES WEST OF LAMONI...MOVING EAST AT
45 MPH.
LOCATIONS IMPACTED INCLUDE...
LAMONI...KELLERTON...BEACONSFIELD...LAMONI AIRPORT AND GRAND RIVER.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 1 AND 8.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS.
&&
LAT...LON 4075 9426 4090 9397 4089 9386 4057 9383
4056 9433
TIME...MOT...LOC 0403Z 249DEG 37KT 4069 9410
WIND...HAIL 60MPH 1.00IN
$$
DONAVON833
WWUS53 KDMX 300426
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1126 PM CDT THU MAR 29 2012
IAC053-159-300437-
/O.EXP.KDMX.SV.W.0007.000000T0000Z-120330T0430Z/
RINGGOLD IA-DECATUR IA-
1126 PM CDT THU MAR 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN DECATUR AND
SOUTHEASTERN RINGGOLD COUNTIES WILL EXPIRE AT 1130 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 2 AM.
LAT...LON 4075 9426 4090 9397 4089 9386 4057 9383
4056 9433
TIME...MOT...LOC 0427Z 249DEG 34KT 4076 9385
$$
DONAVONThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 7:25 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 50 min |
| Mar 29, 8:13 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass | 47 min |
| Mar 29, 8:49 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 44 min |
| Mar 29, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor | 41 min |
| Mar 30, 6:00 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 17 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.