Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 13, NWS Des Moines, IA

June 1, 2014Winnebago County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 1, 2014, 12:51 PM CDT for Winnebago County, Iowa. It was in force for 24 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: Jun 1, 2014, 12:51 PM CDT (17:51 UTC)
Expired: Jun 1, 2014, 1:15 PM CDT
In force: 24 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Winnebago County, IA

The radar

The Minneapolis radar (KMPX), 157 km from the middle of the area, began a volume at 17:53 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 12:00Z, 5.9 hours before the alert went out and 157 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 327 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 497 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

038 
WFUS53 KDMX 011751
TORDMX
IAC189-011815-
/O.NEW.KDMX.TO.W.0013.140601T1751Z-140601T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1251 PM CDT SUN JUN 1 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN WINNEBAGO COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 115 PM CDT
    
* AT 1251 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 15 MILES WEST OF LAKE MILLS...OR 17 MILES
  NORTHWEST OF FOREST CITY...MOVING NORTHEAST AT 30 MPH.

  HAZARD...TORNADO. 

  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...
  LAKE MILLS...RAKE...SCARVILLE...HOGSBACK WILDLIFE AREA AND LAKE
  MILLS 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 4341 9351 4338 9388 4347 9397 4350 9393
      4350 9359
TIME...MOT...LOC 1751Z 239DEG 25KT 4345 9384 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

SMALL

1 follow-up statement

928 
WWUS53 KDMX 011814
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
114 PM CDT SUN JUN 1 2014

IAC189-011824-
/O.EXP.KDMX.TO.W.0013.000000T0000Z-140601T1815Z/
WINNEBAGO IA-
114 PM CDT SUN JUN 1 2014

...THE TORNADO WARNING FOR NORTHERN WINNEBAGO COUNTY WILL EXPIRE AT
115 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.  HOWEVER SMALL HAIL
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4341 9351 4338 9388 4347 9397 4350 9393
      4350 9359
TIME...MOT...LOC 1813Z 239DEG 25KT 4345 9384 

$$

SMALL

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 12:45 PM CDT	Special Weather Statement	DMX	Bremer, Butler, Cerro Gordo, Emmet, Franklin, Hancock and 7 more	2 hr
Jun 1, 1:31 PM CDT	Tornado Warning Tornado observed	DMX	Hancock, Kossuth, Winnebago	29 min
Jun 1, 1:49 PM CDT	Tornado Warning	DMX	Worth	26 min
Jun 1, 2:31 PM CDT	Tornado Warning Tornado observed	DMX	Cerro Gordo, Worth	29 min
Jun 1, 2:46 PM CDT	Flash Flood Warning	DMX	Kossuth, Palo Alto	6 hr
Jun 1, 2:57 PM CDT	Flash Flood Watch	DMX	Cerro Gordo, Emmet, Hancock, Kossuth, Palo Alto, Pocahontas and 2 more	8 hr
Jun 1, 5:13 PM CDT	Severe Thunderstorm Warning	DMX	Sac	47 min
Jun 1, 5:49 PM CDT	Special Weather Statement	DMX	Audubon, Cass	56 min
Jun 1, 6:04 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	41 min
Jun 1, 6:25 PM CDT	Special Weather Statement	DMX	Adair, Cass, Greene, Guthrie	35 min

Nearby

Tornado Warnings in Iowa, 2014 Every tornado warning in 2014 Tornadoes 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.