Alert archive / Iowa / Tornado Warnings in 2014
Tornado Warning 57, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Aug 31, 2014, 6:48 PM CDT for Crawford County, Iowa. It was in force for 42 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
- Aug 31, 2014, 6:48 PM CDT (23:48 UTC)
- Expired
- Aug 31, 2014, 7:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.25 in
County Crawford County, IA
The radar
The Omaha radar (KOAX), 117 km from the middle of the area, began a volume at 23:51 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 |
|---|---|---|---|
| Aug 31, 7:15 PM CDT | TSTM WND GST 63 | Denison, IA | *** 1 INJ *** MEASURED AT DENISON AWOS. EM REPORTS MULTIPLE TREES DOWN AND INDIVIDUAL STRUCK BY LIGHTNING. MULTIPLE POWER OUTAGES. |
| Aug 31, 7:30 PM CDT | FUNNEL CLOUD | 1 W Vail, IA | |
| Aug 31, 7:32 PM CDT | TSTM WND DMG | 1 W Denison, IA | CAMPERS TIPPED OVER |
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 |
|---|---|---|---|
| Aug 31, 3:31 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.8 hours before the alert went out and 117 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
- 282 J/kg
- Mixed-layer CIN
- -342 J/kg
- Mixed-layer LCL
- 1715 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
270
WFUS53 KDMX 312348
TORDMX
IAC047-010030-
/O.NEW.KDMX.TO.W.0057.140831T2348Z-140901T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
648 PM CDT SUN AUG 31 2014
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* TORNADO WARNING FOR...
EAST CENTRAL CRAWFORD COUNTY IN WEST CENTRAL IOWA...
* UNTIL 730 PM CDT
* AT 648 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED 4 MILES WEST OF DENISON...MOVING EAST AT 20
MPH.
HAZARD...TORNADO...HALF DOLLAR SIZE HAIL AND 60 MPH WIND GUSTS.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.
DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE
DAMAGE IS LIKELY.
* LOCATIONS IMPACTED INCLUDE...
DENISON...VAIL...WESTSIDE...DELOIT AND DENISON MUNICIPAL AIRPORT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4207 9552 4215 9509 4197 9509 4198 9551
TIME...MOT...LOC 2348Z 256DEG 15KT 4204 9544
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
PODRAZIK2 follow-up statements
349
WWUS53 KDMX 010013
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
713 PM CDT SUN AUG 31 2014
IAC047-010030-
/O.CON.KDMX.TO.W.0057.000000T0000Z-140901T0030Z/
CRAWFORD IA-
713 PM CDT SUN AUG 31 2014
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR EAST
CENTRAL CRAWFORD COUNTY...
AT 713 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR DENISON...MOVING EAST AT 10 MPH.
HAZARD...TORNADO AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED ROTATION.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
LIKELY.
LOCATIONS IMPACTED INCLUDE...
DENISON...VAIL...WESTSIDE AND DELOIT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A
VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4208 9542 4215 9509 4197 9509 4202 9543
TIME...MOT...LOC 0013Z 267DEG 7KT 4205 9535
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
PODRAZIK573
WWUS53 KDMX 010028
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
728 PM CDT SUN AUG 31 2014
IAC047-010037-
/O.EXP.KDMX.TO.W.0057.000000T0000Z-140901T0030Z/
CRAWFORD IA-
728 PM CDT SUN AUG 31 2014
...THE TORNADO WARNING FOR EAST CENTRAL CRAWFORD COUNTY WILL EXPIRE
AT 730 PM CDT...
THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...LARGE HAIL AND DAMAGING WINDS REMAIN LIKELY
AND A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR THE AREA.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT MONDAY MORNING FOR
NORTHWEST IOWA.A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 200 AM
CDT MONDAY MORNING FOR SOUTHWEST IOWA.
REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
CRAWFORD COUNTY.
LAT...LON 4208 9542 4215 9509 4197 9509 4202 9543
TIME...MOT...LOC 0022Z 256DEG 15KT 4205 9535
$$
PODRAZIKThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 8:15 PM CDT | River Flood Warning | DMX | Madison, Warren | 48 hr |
| Aug 31, 3:43 PM CDT | Flash Flood Watch | DMX | Adair, Adams, Audubon, Boone, Carroll, Cass and 13 more | 9 hr |
| Aug 31, 6:02 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 28 min |
| Aug 31, 6:24 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 51 min |
| Aug 31, 6:27 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 48 min |
| Aug 31, 6:54 PM CDT | Flash Flood Warning | DMX | Carroll, Crawford | 6 hr |
Nearby
Tornado Warnings in Iowa, 2014Every tornado warning in 2014Tornadoes in 2014
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.