Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 7, NWS Des Moines, IA

May 11, 2014Mahaska County, Wapello County, Iowa

NWS Des Moines, IA issued this tornado warning at May 11, 2014, 1:59 PM CDT for Mahaska County, Wapello County, Iowa. It was in force for 46 min. 4 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 11, 2014, 1:59 PM CDT (18:59 UTC)
Expired: May 11, 2014, 2:45 PM CDT
In force: 46 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Mahaska County, IA, Wapello County, IA

The radar

The Des Moines radar (KDMX), 124 km from the middle of the area, began a volume at 19:00 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 11, 2:11 PM CDT	FUNNEL CLOUD	10 W Ottumwa, IA
May 11, 2:28 PM CDT	HAIL 0.5	2 S Fremont, IA
May 11, 2:29 PM CDT	HAIL 1	4 Nw Ottumwa, IA	TRAINED SPOTTER MEASURED NICKEL TO QUARTER SIZE HAIL
May 11, 2:29 PM CDT	HAIL 1.5	4 Nw Ottumwa, IA	EDITED FOR INCREASED HAIL SIZE AS SPOTTER PROVIDED PICTURE OF PING PONG BALL SIZE HAIL

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 11, 11:53 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.0 hours before the alert went out and 174 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: 52 J/kg
Mixed-layer CIN: -261 J/kg
Mixed-layer LCL: 1382 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

614 
WFUS53 KDMX 111859
TORDMX
IAC123-179-111945-
/O.NEW.KDMX.TO.W.0007.140511T1859Z-140511T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
159 PM CDT SUN MAY 11 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MAHASKA COUNTY IN SOUTH CENTRAL IOWA...
  WAPELLO COUNTY IN SOUTHEAST IOWA...

* UNTIL 245 PM CDT
    
* AT 159 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES SOUTH OF EDDYVILLE...OR 9 MILES EAST OF
  ALBIA...MOVING NORTHEAST AT 45 MPH.

  HAZARD...TORNADO...QUARTER 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...
  OTTUMWA...EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...FREMONT...
  AGENCY...BLAKESBURG...KIRKVILLE...CHILLICOTHE AND OSKALOOSA
  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 4094 9264 4110 9264 4116 9265 4123 9265
      4130 9241 4118 9241 4116 9240 4116 9218
      4100 9218
TIME...MOT...LOC 1859Z 239DEG 38KT 4105 9262 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BEERENDS

4 follow-up statements

682 
WWUS53 KDMX 111907
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
207 PM CDT SUN MAY 11 2014

IAC123-179-111945-
/O.CON.KDMX.TO.W.0007.000000T0000Z-140511T1945Z/
MAHASKA IA-WAPELLO IA-
207 PM CDT SUN MAY 11 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR
SOUTHEASTERN MAHASKA AND WAPELLO COUNTIES...
    
AT 207 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 7 MILES SOUTHWEST OF OTTUMWA INDUSTRIAL AIRPORT...OR 8
MILES WEST OF OTTUMWA...MOVING EAST AT 25 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...
OTTUMWA...EDDYVILLE...OTTUMWA INDUSTRIAL AIRPORT...FREMONT...
AGENCY...KIRKVILLE...CHILLICOTHE AND OSKALOOSA 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 4097 9264 4110 9264 4120 9265 4126 9241
      4118 9241 4116 9240 4116 9218 4100 9218
TIME...MOT...LOC 1907Z 259DEG 21KT 4104 9257 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BEERENDS

104 
WWUS53 KDMX 111918
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
218 PM CDT SUN MAY 11 2014

IAC123-111928-
/O.CAN.KDMX.TO.W.0007.000000T0000Z-140511T1945Z/
MAHASKA IA-

218 PM CDT SUN MAY 11 2014

...THE TORNADO WARNING FOR SOUTHEASTERN MAHASKA COUNTY IS
CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING FOR
SOUTHEAST IOWA.

LAT...LON 4100 9262 4110 9263 4112 9262 4116 9248
      4116 9218 4100 9218
TIME...MOT...LOC 1918Z 261DEG 30KT 4106 9246 

$$

IAC179-111945-
/O.CON.KDMX.TO.W.0007.000000T0000Z-140511T1945Z/
WAPELLO IA-
218 PM CDT SUN MAY 11 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR NORTHERN
WAPELLO COUNTY...
    
AT 218 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR OTTUMWA INDUSTRIAL AIRPORT...OR NEAR OTTUMWA...
MOVING EAST AT 35 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...
OTTUMWA...OTTUMWA INDUSTRIAL AIRPORT...AGENCY...KIRKVILLE AND
CHILLICOTHE.

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 4100 9262 4110 9263 4112 9262 4116 9248
      4116 9218 4100 9218
TIME...MOT...LOC 1918Z 261DEG 30KT 4106 9246 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BEERENDS

913 
WWUS53 KDMX 111931
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
231 PM CDT SUN MAY 11 2014

IAC179-111945-
/O.CON.KDMX.TO.W.0007.000000T0000Z-140511T1945Z/
WAPELLO IA-
231 PM CDT SUN MAY 11 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR
NORTHEASTERN WAPELLO COUNTY...
    
AT 231 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR OTTUMWA INDUSTRIAL AIRPORT...OR NEAR OTTUMWA...
MOVING EAST AT 30 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...
OTTUMWA AND OTTUMWA INDUSTRIAL 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 4104 9249 4109 9249 4115 9244 4116 9236
      4116 9218 4103 9218
TIME...MOT...LOC 1931Z 251DEG 26KT 4108 9237 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BEERENDS

387 
WWUS53 KDMX 111946
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
246 PM CDT SUN MAY 11 2014

IAC179-111955-
/O.EXP.KDMX.TO.W.0007.000000T0000Z-140511T1945Z/
WAPELLO IA-
246 PM CDT SUN MAY 11 2014

...THE TORNADO WARNING FOR NORTHEASTERN WAPELLO COUNTY HAS EXPIRED...
    
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.
HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING FOR
SOUTHEAST IOWA.

LAT...LON 4104 9249 4109 9249 4115 9244 4116 9236
      4116 9218 4103 9218
TIME...MOT...LOC 1944Z 239DEG 38KT 4108 9237 

$$

BEERENDS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 10:14 AM CDT	Special Weather Statement	DMX	Adams, Clarke, Decatur, Madison, Ringgold, Taylor and 1 more	61 min
May 11, 11:47 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Wayne	43 min
May 11, 11:57 AM CDT	Tornado Warning	DMX	Clarke, Lucas	33 min
May 11, 12:26 PM CDT	Flash Flood Warning	DMX	Clarke, Decatur, Ringgold, Union	3 hr
May 11, 12:31 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Wayne	44 min
May 11, 1:09 PM CDT	Tornado Warning	DMX	Lucas, Monroe, Wayne	36 min
May 11, 1:14 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Mahaska, Marion, Monroe	61 min
May 11, 1:44 PM CDT	Tornado Warning	DMX	Mahaska, Monroe	31 min
May 11, 1:55 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Monroe, Wapello	65 min
May 11, 3:24 PM CDT	Special Weather Statement	DMX	Wapello	36 min
May 11, 3:32 PM CDT	Flash Flood Watch	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 32 more	15 hr
May 11, 3:33 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	27 min
May 11, 3:43 PM CDT	Severe Thunderstorm Warning	DMX	Monroe, Wapello	62 min
May 11, 4:01 PM CDT	Tornado Warning	DMX	Wapello	44 min
May 11, 4:27 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.