Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 74, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 6, 2012, 6:30 AM CDT for Adair County, Cass County, Iowa. It was in force for 45 min. 3 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 6, 2012, 6:30 AM CDT (11:30 UTC)
- Expired
- May 6, 2012, 7:15 AM CDT
- In force
- 45 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Adair County, IA, Cass County, IA
The radar
The Des Moines radar (KDMX), 109 km from the middle of the area, began a volume at 11:33 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, 6:30 AM CDT | TSTM WND DMG | Atlantic, IA | SOME SHINGLES BLOWN OFF ROOFS...ABOUT 12 TO 14 ONE FOOT DIAMETER TREES SNAPPED. TIME ESTIMATED FROM RADAR. |
| May 6, 6:31 AM CDT | TSTM WND GST 69 | Atlantic, IA | A FEW SHINGLES BLOWN OFF HOUSE. TREE BRANCHES DOWN...SIZE UNKNOWN. |
| May 6, 7:05 AM CDT | TSTM WND GST 65 | 6 Wsw Greenfield, IA | MEASURED BY KCCI SCHOOLNET SITE AT NODAWAY VALLEY SCHOOL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 11.5 hours before the alert went out and 122 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
- 2892 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1936 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 6.4
The text
As transmitted, in the capitals the NWS used until 2016.
864
WUUS53 KDMX 061130
SVRDMX
IAC001-029-061215-
/O.NEW.KDMX.SV.W.0074.120506T1130Z-120506T1215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
630 AM CDT SUN MAY 6 2012
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN ADAIR COUNTY IN SOUTHWEST IOWA...
CASS COUNTY IN SOUTHWEST IOWA...
* UNTIL 715 AM CDT
* AT 629 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
ATLANTIC...AND MOVING EAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
CUMBERLAND...WIOTA...MASSENA...ANITA...BRIDGEWATER AND FONTANELLE.
THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 79 AND 82.
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 4144 9514 4150 9453 4116 9451 4115 9500
4116 9513
TIME...MOT...LOC 1130Z 262DEG 30KT 4133 9501
WIND...HAIL 60MPH 1.00IN
$$
ZOGG3 follow-up statements
886
WWUS53 KDMX 061141
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
641 AM CDT SUN MAY 6 2012
IAC001-029-061215-
/O.CON.KDMX.SV.W.0074.000000T0000Z-120506T1215Z/
ADAIR IA-CASS IA-
641 AM CDT SUN MAY 6 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CASS AND
WESTERN ADAIR COUNTIES UNTIL 715 AM CDT...
AT 638 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
SOUTHEAST OF ATLANTIC...MOVING EAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
MASSENA...ANITA...BRIDGEWATER AND FONTANELLE.
THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 76 AND 81.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS.
&&
LAT...LON 4150 9453 4116 9451 4115 9500 4133 9503
4144 9510
TIME...MOT...LOC 1142Z 262DEG 30KT 4134 9488
WIND...HAIL 60MPH 1.00IN
$$
ZOGG595
WWUS53 KDMX 061151
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
651 AM CDT SUN MAY 6 2012
IAC001-029-061215-
/O.CON.KDMX.SV.W.0074.000000T0000Z-120506T1215Z/
ADAIR IA-CASS IA-
651 AM CDT SUN MAY 6 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN CASS
AND WESTERN ADAIR COUNTIES UNTIL 715 AM CDT...
AT 647 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 11 MILES
EAST OF ATLANTIC...MOVING EAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
ANITA...BRIDGEWATER AND FONTANELLE.
THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 76 AND 81.
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 4116 9492 4133 9492 4145 9502 4150 9453
4116 9451
TIME...MOT...LOC 1151Z 262DEG 30KT 4135 9478
WIND...HAIL 60MPH 1.00IN
$$
ZOGG863
WWUS53 KDMX 061158
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
658 AM CDT SUN MAY 6 2012
IAC001-029-061215-
/O.CON.KDMX.SV.W.0074.000000T0000Z-120506T1215Z/
ADAIR IA-CASS IA-
658 AM CDT SUN MAY 6 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN CASS
AND WESTERN ADAIR COUNTIES UNTIL 715 AM CDT...
AT 656 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 14 MILES
WEST OF GREENFIELD...OR 15 MILES EAST OF ATLANTIC...MOVING EAST AT 35
MPH.
LOCATIONS IMPACTED INCLUDE...
BRIDGEWATER AND FONTANELLE.
THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 76 AND 81.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A REINFORCED BUILDING AND AWAY FROM WINDOWS.
&&
LAT...LON 4117 9476 4136 9480 4146 9490 4150 9453
4116 9451
TIME...MOT...LOC 1158Z 262DEG 30KT 4136 9470
WIND...HAIL 60MPH 1.00IN
$$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, 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, 8:27 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 48 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.