Alert archive / Iowa / Tornado Warnings in 2012
Tornado Warning 7, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at May 2, 2012, 1:47 AM CDT for 4 counties in Iowa. It was in force for 28 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 2, 2012, 1:47 AM CDT (06:47 UTC)
- Expired
- May 2, 2012, 2:15 AM CDT
- In force
- 28 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
Counties Boone County, IA, Hamilton County, IA, Hardin County, IA, Story County, IA
The radar
The Des Moines radar (KDMX), 57 km from the middle of the area, began a volume at 06:49 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 2, 1:59 AM CDT | TSTM WND DMG | Roland, IA | THE TOP OF A TREE TWO FOOT IN DIAMETER WAS SNAPPED OFF IN THE TOWN OF ROLAND. 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 1, 9:18 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 6.8 hours before the alert went out and 255 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
791 WFUS53 KDMX 020647 TORDMX IAC015-079-083-169-020715- /O.NEW.KDMX.TO.W.0007.120502T0647Z-120502T0715Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 147 AM CDT WED MAY 2 2012 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * TORNADO WARNING FOR... NORTHEASTERN BOONE COUNTY IN CENTRAL IOWA... SOUTHEASTERN HAMILTON COUNTY IN CENTRAL IOWA... SOUTHWESTERN HARDIN COUNTY IN CENTRAL IOWA... NORTHERN STORY COUNTY IN CENTRAL IOWA... * UNTIL 215 AM CDT * AT 145 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 7 MILES WEST OF STORY CITY...OR 12 MILES NORTHWEST OF AMES...AND MOVING EAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... STORY CITY...GILBERT...RANDALL...ROLAND...MCCALLSBURG...ZEARING AND HUBBARD. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 118 AND 131. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT... OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE LOWEST SPOT AVAILABLE AND COVER YOUR HEAD. THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT FOR THE SAME AREA. IMMEDIATELY SEEK SHELTER IN A BASEMENT...OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. TORNADOES ARE DIFFICULT TO SEE AT NIGHT...ACT QUICKLY. TAKE COVER NOW! && LAT...LON 4233 9330 4210 9325 4208 9377 4224 9379 TIME...MOT...LOC 0647Z 265DEG 43KT 4218 9369 $$ BEERENDS
2 follow-up statements
413 WWUS53 KDMX 020656 RRA SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 156 AM CDT WED MAY 2 2012 IAC015-020707- /O.CAN.KDMX.TO.W.0007.000000T0000Z-120502T0715Z/ BOONE IA- 156 AM CDT WED MAY 2 2012 ...THE TORNADO WARNING FOR NORTHEASTERN BOONE COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4209 9362 4226 9366 4233 9330 4210 9325 TIME...MOT...LOC 0657Z 265DEG 43KT 4218 9351 $$ IAC079-083-169-020715- /O.CON.KDMX.TO.W.0007.000000T0000Z-120502T0715Z/ STORY IA-HARDIN IA-HAMILTON IA- 156 AM CDT WED MAY 2 2012 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN HAMILTON... SOUTHWESTERN HARDIN AND NORTHERN STORY COUNTIES UNTIL 215 AM CDT... AT 154 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR STORY CITY...OR 11 MILES NORTH OF AMES... MOVING EAST AT 50 MPH. LOCATIONS IMPACTED INCLUDE... MCCALLSBURG...ZEARING AND HUBBARD. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 118 AND 130. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IMMEDIATELY SEEK SHELTER IN A BASEMENT... OR IN AN INTERIOR ROOM OF A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE...IN A MOBILE HOME...OR IN A VEHICLE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...FIND THE LOWEST SPOT AVAILABLE AND COVER YOUR HEAD. TORNADOES ARE DIFFICULT TO SEE AT NIGHT...ACT QUICKLY. TAKE COVER NOW. && LAT...LON 4209 9362 4226 9366 4233 9330 4210 9325 TIME...MOT...LOC 0657Z 265DEG 43KT 4218 9351 $$ BEERENDS
284 WWUS53 KDMX 020706 SVSDMX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 206 AM CDT WED MAY 2 2012 IAC079-083-169-020716- /O.EXP.KDMX.TO.W.0007.000000T0000Z-120502T0715Z/ STORY IA-HARDIN IA-HAMILTON IA- 206 AM CDT WED MAY 2 2012 ...THE TORNADO WARNING FOR SOUTHEASTERN HAMILTON...SOUTHWESTERN HARDIN AND NORTHERN STORY COUNTIES WILL EXPIRE AT 215 AM CDT... THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA. HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM. IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT. REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN HARDIN AND NORTHERN STORY COUNTIES UNTIL 245 AM CDT. LAT...LON 4209 9362 4226 9366 4233 9330 4210 9325 TIME...MOT...LOC 0706Z 265DEG 43KT 4219 9336 $$ BEERENDS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 9:59 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Palo Alto | 46 min |
| May 1, 10:45 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth, Palo Alto | 45 min |
| May 1, 11:24 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 51 min |
| May 1, 11:35 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 25 min |
| May 2, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 44 min |
| May 2, 12:38 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Greene, Sac | 52 min |
| May 2, 1:02 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Guthrie | 43 min |
| May 2, 1:07 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Carroll, Dallas, Greene, Guthrie | 38 min |
| May 2, 1:24 AM CDT | Tornado Warning | DMX | Boone | 36 min |
| May 2, 1:27 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Story, Webster | 48 min |
| May 2, 1:39 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Polk, Story | 51 min |
| May 2, 1:53 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 52 min |
| May 2, 2:04 AM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Marshall, Story | 41 min |
| May 2, 2:37 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Marshall, Tama | 36 min |
| May 2, 3:18 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 15 min |
| May 2, 3:46 PM CDT | Flash Flood Watch | DMX | Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 1 more | 12 hr |
Nearby
Tornado Warnings in Iowa, 2012Every tornado warning in 2012Tornadoes 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.