Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 79, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 6, 2012, 8:27 AM CDT for 4 counties in Iowa. It was in force for 48 min. 1 report 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 6, 2012, 8:27 AM CDT (13:27 UTC)
- Expired
- May 6, 2012, 9:15 AM CDT
- In force
- 48 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Jasper County, IA, Marion County, IA, Polk County, IA, Warren County, IA
The radar
The Des Moines radar (KDMX), 39 km from the middle of the area, began a volume at 13:28 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 6, 8:35 AM CDT | HAIL 0.88 | 2 S Altoona, IA | TIME ESTIMATED FROM RADAR. |
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 6, 7:17 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 1.5 hours before the alert went out and 231 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
- 2361 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 571 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.6
The text
As transmitted, in the capitals the NWS used until 2016.
823 WUUS53 KDMX 061327 SVRDMX IAC099-125-153-181-061415- /O.NEW.KDMX.SV.W.0079.120506T1327Z-120506T1415Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 827 AM CDT SUN MAY 6 2012 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN JASPER COUNTY IN CENTRAL IOWA... NORTHWESTERN MARION COUNTY IN SOUTH CENTRAL IOWA... SOUTHERN POLK COUNTY IN CENTRAL IOWA... NORTHEASTERN WARREN COUNTY IN SOUTH CENTRAL IOWA... * UNTIL 915 AM CDT * AT 823 AM 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 DES MOINES...AND MOVING EAST AT 35 MPH. AT 819 AM CDT SOME ROOF DAMAGE WAS REPORTED IN NORWALK WITH THIS STORM WITH WINDS ESTIMATED AT 65 MPH. * LOCATIONS IMPACTED INCLUDE... NEWTON...CARLISLE...PLEASANT HILL...ALTOONA...PRAIRIE CITY... COLFAX...MONROE...HARTFORD...RUNNELLS...SWAN...MITCHELLVILLE... NEWTON AIRPORT...LAMBS GROVE AND REASNOR. THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 142 AND 168. THIS INCLUDES INTERSTATE 235 BETWEEN MILE MARKERS 3 AND 13. 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 4179 9305 4153 9290 4135 9364 4159 9374 TIME...MOT...LOC 1326Z 251DEG 29KT 4152 9356 WIND...HAIL 60MPH 1.00IN $$ ZOGG
1 follow-up statement
137 WWUS53 KDMX 061344 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 844 AM CDT SUN MAY 6 2012 IAC099-125-153-181-061415- /O.CON.KDMX.SV.W.0079.000000T0000Z-120506T1415Z/ WARREN IA-POLK IA-MARION IA-JASPER IA- 844 AM CDT SUN MAY 6 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN JASPER...NORTHWESTERN MARION...SOUTHEASTERN POLK AND NORTHEASTERN WARREN COUNTIES UNTIL 915 AM CDT... AT 842 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES NORTHEAST OF CARLISLE...OR 11 MILES EAST OF DES MOINES...MOVING EAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... NEWTON...PRAIRIE CITY...COLFAX...MONROE...SWAN...MITCHELLVILLE... NEWTON AIRPORT...LAMBS GROVE AND REASNOR. THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 143 AND 168. THIS INCLUDES INTERSTATE 235 BETWEEN MILE MARKERS 10 AND 13. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS. && LAT...LON 4162 9361 4179 9305 4153 9290 4137 9355 TIME...MOT...LOC 1344Z 251DEG 29KT 4157 9338 WIND...HAIL 60MPH 1.00IN $$ ZOGG
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 4:32 AM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Wright | 43 min |
| May 6, 5:52 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Guthrie | 53 min |
| May 6, 6:30 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass | 45 min |
| May 6, 7:05 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie, Madison | 25 min |
| May 6, 7:09 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 22 min |
| May 6, 7:29 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie, Madison | 31 min |
| May 6, 7:59 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 46 min |
| May 6, 9:03 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion | 42 min |
| May 6, 9:12 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion | 48 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.