Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 47, NWS Des Moines, IA

July 6, 2014Butler County, Grundy County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 6, 2014, 6:58 PM CDT for Butler County, Grundy County, Iowa. It was in force for 32 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: Jul 6, 2014, 6:58 PM CDT (23:58 UTC)
Expired: Jul 6, 2014, 7:30 PM CDT
In force: 32 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

Counties Butler County, IA, Grundy County, IA

The radar

The Des Moines radar (KDMX), 123 km from the middle of the area, began a volume at 00:03 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
Jul 6, 7:25 PM CDT	FUNNEL CLOUD	New Hartford, IA	PUBLIC REPORTED FUNNEL CLOUD NEAR NEW HARTFORD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 12.0 hours before the alert went out and 215 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: 1198 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

009 
WFUS53 KDMX 062358
TORDMX
IAC023-075-070030-
/O.NEW.KDMX.TO.W.0047.140706T2358Z-140707T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
658 PM CDT SUN JUL 6 2014

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN BUTLER COUNTY IN NORTH CENTRAL IOWA...
  NORTH CENTRAL GRUNDY COUNTY IN CENTRAL IOWA...

* UNTIL 730 PM CDT

* AT 657 PM CDT...A CONFIRMED TORNADO WAS LOCATED 5 MILES NORTH OF
  APLINGTON...OR 8 MILES SOUTHWEST OF ALLISON...MOVING SOUTHEAST AT
  30 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...
  ALLISON...PARKERSBURG...APLINGTON...NEW HARTFORD AND STOUT. 

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 4242 9279 4262 9302 4276 9286 4265 9255
      4261 9256
TIME...MOT...LOC 2357Z 309DEG 24KT 4266 9289 

TORNADO...OBSERVED
HAIL...<.75IN

$$

AWB

3 follow-up statements

072 
WWUS53 KDMX 070008
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
708 PM CDT SUN JUL 6 2014

IAC023-075-070030-
/O.CON.KDMX.TO.W.0047.000000T0000Z-140707T0030Z/
BUTLER IA-GRUNDY IA-
708 PM CDT SUN JUL 6 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN BUTLER AND NORTH CENTRAL GRUNDY COUNTIES...
    
AT 707 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR PARKERSBURG...OR 9 MILES SOUTH OF ALLISON...MOVING
SOUTHEAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. AT 6:55 PM A TORNADO WAS REPORTED 
         EAST OF GENEVA.

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...
PARKERSBURG...APLINGTON...NEW HARTFORD AND STOUT. 

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 4242 9279 4257 9296 4273 9277 4265 9255
      4261 9256
TIME...MOT...LOC 0007Z 309DEG 25KT 4261 9282 

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

$$

AWB

088 
WWUS53 KDMX 070015
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
715 PM CDT SUN JUL 6 2014

IAC023-075-070030-
/O.CON.KDMX.TO.W.0047.000000T0000Z-140707T0030Z/
BUTLER IA-GRUNDY IA-
715 PM CDT SUN JUL 6 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN BUTLER AND NORTH CENTRAL GRUNDY COUNTIES...
    
AT 715 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER PARKERSBURG...OR 12 MILES SOUTH OF ALLISON...MOVING
SOUTHEAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...RADAR INDICATED ROTATION. AT 6:55 PM A TORNADO WAS REPORTED 
         EAST OF GENEVA. 

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...
PARKERSBURG...NEW HARTFORD AND STOUT. 

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 4242 9279 4252 9290 4269 9267 4265 9255
      4261 9256
TIME...MOT...LOC 0015Z 309DEG 24KT 4258 9276 

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

$$

AWB

755 
WWUS53 KDMX 070021
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
721 PM CDT SUN JUL 6 2014

IAC023-075-070031-
/O.EXP.KDMX.TO.W.0047.000000T0000Z-140707T0030Z/
BUTLER IA-GRUNDY IA-
721 PM CDT SUN JUL 6 2014

...THE TORNADO WARNING FOR SOUTHEASTERN BUTLER AND NORTH CENTRAL
GRUNDY COUNTIES 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.

LAT...LON 4242 9279 4252 9290 4269 9267 4265 9255
      4261 9256
TIME...MOT...LOC 0021Z 309DEG 24KT 4258 9276 

$$

AWB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 8:21 PM CDT	River Flood Warning	DMX	Davis, Wapello	48 hr
Jul 6, 6:30 PM CDT	Special Weather Statement	DMX	Story	30 min
Jul 6, 6:49 PM CDT	Special Weather Statement	DMX	Butler	56 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.