Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 90, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 24, 2012, 4:26 PM CDT for Decatur County, Wayne County, Iowa. It was in force for 49 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
- May 24, 2012, 4:26 PM CDT (21:26 UTC)
- Expired
- May 24, 2012, 5:15 PM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Decatur County, IA, Wayne County, IA
The radar
The Des Moines radar (KDMX), 120 km from the middle of the area, began a volume at 21:30 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 |
|---|---|---|---|
| May 24, 4:30 PM CDT | HAIL 0.75 | Ne Lamoni, IA | |
| May 24, 5:00 PM CDT | HAIL 1 | 5 Ene Davis City, IA | ALSO 1.10 INCHES OF RAIN IN 20 MINUTE3 |
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 |
|---|---|---|---|
| May 24, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.4 hours before the alert went out and 232 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
- 13 J/kg
- Mixed-layer CIN
- -551 J/kg
- Mixed-layer LCL
- 701 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 209 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
085 WUUS53 KDMX 242126 SVRDMX IAC053-185-242215- /O.NEW.KDMX.SV.W.0090.120524T2126Z-120524T2215Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 426 PM CDT THU MAY 24 2012 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN DECATUR COUNTY IN SOUTH CENTRAL IOWA... SOUTHWESTERN WAYNE COUNTY IN SOUTH CENTRAL IOWA... * UNTIL 515 PM CDT * AT 425 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 NEAR LAMONI...AND MOVING EAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... LAMONI AIRPORT...DAVIS CITY...PLEASANTON...LINEVILLE AND CLIO. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 1 AND 10. 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 9401 4077 9338 4057 9337 4057 9401 TIME...MOT...LOC 2127Z 260DEG 30KT 4058 9391 WIND...HAIL 60MPH 1.00IN $$ COGIL
3 follow-up statements
009 WWUS53 KDMX 242147 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 447 PM CDT THU MAY 24 2012 IAC053-185-242215- /O.CON.KDMX.SV.W.0090.000000T0000Z-120524T2215Z/ WAYNE IA-DECATUR IA- 447 PM CDT THU MAY 24 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN DECATUR AND SOUTHWESTERN WAYNE COUNTIES UNTIL 515 PM CDT... AT 443 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL... AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 10 MILES SOUTH OF LEON...OR 11 MILES EAST OF LAMONI...MOVING EAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... LINEVILLE AND CLIO. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR LARGE HAIL AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A REINFORCED BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4057 9389 4065 9383 4077 9338 4057 9337 TIME...MOT...LOC 2147Z 260DEG 30KT 4061 9369 WIND...HAIL 60MPH 1.50IN $$ COGIL
530 WWUS53 KDMX 242206 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 506 PM CDT THU MAY 24 2012 IAC053-185-242215- /O.CON.KDMX.SV.W.0090.000000T0000Z-120524T2215Z/ WAYNE IA-DECATUR IA- 506 PM CDT THU MAY 24 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN DECATUR AND SOUTHWESTERN WAYNE COUNTIES UNTIL 515 PM CDT... AT 502 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 8 MILES NORTHWEST OF MERCER...OR 17 MILES EAST OF LAMONI...MOVING EAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... LINEVILLE AND CLIO. 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 4057 9377 4065 9369 4077 9338 4057 9337 TIME...MOT...LOC 2203Z 260DEG 25KT 4060 9361 WIND...HAIL 60MPH 1.00IN $$ COGIL
877 WWUS53 KDMX 242216 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 516 PM CDT THU MAY 24 2012 IAC053-185-242226- /O.EXP.KDMX.SV.W.0090.000000T0000Z-120524T2215Z/ WAYNE IA-DECATUR IA- 516 PM CDT THU MAY 24 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DECATUR AND SOUTHWESTERN WAYNE COUNTIES HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4057 9377 4065 9369 4077 9338 4057 9337 TIME...MOT...LOC 2206Z 260DEG 25KT 4060 9358 $$
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 7:26 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 49 min |
| May 23, 8:15 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Sac | 45 min |
| May 23, 8:51 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas | 39 min |
| May 24, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Hardin | 45 min |
| May 24, 3:56 PM CDT | Severe Thunderstorm Warning | DMX | Bremer, Butler, Grundy | 49 min |
| May 24, 4:30 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 19 min |
| May 24, 4:55 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Tama | 50 min |
| May 24, 5:51 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion, Poweshiek | 39 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.