Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Mar 19, 2012, 3:48 PM CDT for 4 counties in Iowa. It was in force for 42 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 19, 2012, 3:48 PM CDT (20:48 UTC)
- Expired
- Mar 19, 2012, 4:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clarke County, IA, Decatur County, IA, Ringgold County, IA, Union County, IA
The radar
The Des Moines radar (KDMX), 98 km from the middle of the area, began a volume at 20:49 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 nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.8 hours before the alert went out and 214 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
- 827 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 200 m²/s²
- 0-3 km storm-relative helicity
- 265 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
338
WUUS53 KDMX 192048
SVRDMX
IAC039-053-159-175-192130-
/O.NEW.KDMX.SV.W.0001.120319T2048Z-120319T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
348 PM CDT MON MAR 19 2012
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN CLARKE COUNTY IN SOUTH CENTRAL IOWA...
DECATUR COUNTY IN SOUTH CENTRAL IOWA...
EASTERN RINGGOLD COUNTY IN SOUTH CENTRAL IOWA...
SOUTHEASTERN UNION COUNTY IN SOUTH CENTRAL IOWA...
* UNTIL 430 PM CDT
* AT 344 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 11
MILES SOUTHWEST OF LAMONI...AND MOVING NORTH AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
LAMONI...LEON...LAMONI AIRPORT...DAVIS CITY...KELLERTON...DECATUR
CITY...BEACONSFIELD...ELLSTON...GRAND RIVER...VAN WERT...WELDON...
LE ROY...THAYER AND MURRAY.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 1 AND 32.
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 4108 9407 4096 9356 4092 9356 4057 9382
4057 9427
TIME...MOT...LOC 2048Z 201DEG 41KT 4053 9404
WIND...HAIL 60MPH 1.00IN
$$
AWB2 follow-up statements
784
WWUS53 KDMX 192116
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
416 PM CDT MON MAR 19 2012
IAC175-192126-
/O.CAN.KDMX.SV.W.0001.000000T0000Z-120319T2130Z/
UNION IA-
416 PM CDT MON MAR 19 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN UNION COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED
AREA.
LAT...LON 4058 9408 4090 9404 4090 9402 4107 9401
4096 9356 4092 9356 4057 9382
TIME...MOT...LOC 2116Z 201DEG 41KT 4083 9389
$$
IAC039-053-159-192130-
/O.CON.KDMX.SV.W.0001.000000T0000Z-120319T2130Z/
RINGGOLD IA-CLARKE IA-DECATUR IA-
416 PM CDT MON MAR 19 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DECATUR...
SOUTHERN CLARKE AND EASTERN RINGGOLD COUNTIES UNTIL 430 PM CDT...
AT 412 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 9 MILES
WEST OF LEON...OR 11 MILES NORTH OF LAMONI...MOVING NORTH AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
VAN WERT...WELDON...LE ROY AND MURRAY.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 1 AND 32.
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 4058 9408 4090 9404 4090 9402 4107 9401
4096 9356 4092 9356 4057 9382
TIME...MOT...LOC 2116Z 201DEG 41KT 4083 9389
WIND...HAIL 60MPH 1.00IN
$$
AWB100
WWUS53 KDMX 192124
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
424 PM CDT MON MAR 19 2012
IAC039-053-159-192134-
/O.EXP.KDMX.SV.W.0001.000000T0000Z-120319T2130Z/
RINGGOLD IA-CLARKE IA-DECATUR IA-
424 PM CDT MON MAR 19 2012
...THE SEVERE THUNDERSTORM WARNING FOR DECATUR...SOUTHERN CLARKE AND
EASTERN RINGGOLD COUNTIES WILL EXPIRE AT 430 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
LAT...LON 4058 9408 4090 9404 4090 9402 4107 9401
4096 9356 4092 9356 4057 9382
TIME...MOT...LOC 2124Z 201DEG 41KT 4091 9384
$$
AWBThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 19, 5:50 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 25 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.