Alert archive / Iowa / Tornado Warnings in 2014
Tornado Warning 56, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Aug 17, 2014, 7:03 PM CDT for Emmet County, Iowa. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2014, 7:03 PM CDT (00:03 UTC)
- Expired
- Aug 17, 2014, 7:30 PM CDT
- In force
- 27 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Tornado
- Observed
- Hail
- 0.75 in
County Emmet County, IA
The radar
The Minneapolis radar (KMPX), 172 km from the middle of the area, began a volume at 00:06 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.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 171 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
- 748 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 658 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
503
WFUS53 KDMX 180003
TORDMX
IAC063-180030-
/O.NEW.KDMX.TO.W.0056.140818T0003Z-140818T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
703 PM CDT SUN AUG 17 2014
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN EMMET COUNTY IN NORTHWEST IOWA...
* UNTIL 730 PM CDT
* AT 702 PM CDT...A CONFIRMED TORNADO WAS LOCATED ABOUT A
MILE EAST OF DOLLIVER...MOVING EAST AT 10 MPH.
HAZARD...DAMAGING TORNADO.
SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.
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...
ARMSTRONG AND OKAMANPEDAN STATE PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A TORNADO IS ON THE GROUND. 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 4348 9444 4347 9444 4337 9454 4344 9462
4349 9459
TIME...MOT...LOC 0002Z 288DEG 7KT 4346 9459
TORNADO...OBSERVED
HAIL...<.75IN
$$
LEE2 follow-up statements
458
WWUS53 KDMX 180019
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
719 PM CDT SUN AUG 17 2014
IAC063-180030-
/O.CON.KDMX.TO.W.0056.000000T0000Z-140818T0030Z/
EMMET IA-
719 PM CDT SUN AUG 17 2014
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHEASTERN EMMET COUNTY...
AT 718 PM CDT...A THUNDERSTORM WAS LOCATED NEAR OKAMANPEDAN
LAKE...OR 14 MILES SOUTH OF FAIRMONT...MOVING EAST AT 10 MPH. THE
SMALL TORNADO THAT BRIEFLY TOUCHED DOWN EARLIER FROM THIS STORM HAS
DISSIPATED...BUT ADDITIONAL FUNNEL CLOUDS OR TORNADOES REMAIN
POSSIBLE.
HAZARD...DAMAGING TORNADO.
SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.
IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
LIKELY.
LOCATIONS IMPACTED INCLUDE...
ARMSTRONG.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW! MOVE TO A
BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4348 9444 4347 9444 4337 9454 4342 9460
4348 9452
TIME...MOT...LOC 0018Z 288DEG 7KT 4345 9455
TORNADO...OBSERVED
HAIL...<.75IN
$$
LEE378
WWUS53 KDMX 180026
SVSDMX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
726 PM CDT SUN AUG 17 2014
IAC063-180036-
/O.EXP.KDMX.TO.W.0056.000000T0000Z-140818T0030Z/
EMMET IA-
726 PM CDT SUN AUG 17 2014
...THE TORNADO WARNING FOR NORTHEASTERN EMMET COUNTY WILL EXPIRE AT
730 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. CONDITIONS WILL
REMAIN FAVORABLE FOR SMALL FUNNEL CLOUDS THROUGH SUNSET.
LAT...LON 4348 9444 4347 9444 4337 9454 4342 9460
4348 9452
TIME...MOT...LOC 0024Z 288DEG 7KT 4345 9455
$$
LEEThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 1:11 AM CDT | Special Weather Statement | DMX | Worth | 64 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.