Alert archive / Iowa / Tornado Warnings in 2014

Tornado Warning 51, NWS Des Moines, IA

July 6, 2014Dallas County, Madison County, Iowa

NWS Des Moines, IA issued this tornado warning at Jul 6, 2014, 8:50 PM CDT for Dallas County, Madison County, Iowa. It was in force for 25 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, 8:50 PM CDT (01:50 UTC)
Expired: Jul 6, 2014, 9:15 PM CDT
In force: 25 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 1.0 in

Counties Dallas County, IA, Madison County, IA

The radar

The Des Moines radar (KDMX), 43 km from the middle of the area, began a volume at 01:51 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
Jul 6, 9:04 PM CDT	FUNNEL CLOUD	1 N Winterset, IA	LAW ENFORCEMENT REPROTS FUNNEL CLOUDS NEAR THE WINTERSET AIRPORT. NOT ON THE GROUND AT THIS TIME.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.8 hours before the alert went out and 199 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: 3665 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1661 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 37 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.

895 
WFUS53 KDMX 070150
TORDMX
IAC049-121-070215-
/O.NEW.KDMX.TO.W.0051.140707T0150Z-140707T0215Z/

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

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL DALLAS COUNTY IN CENTRAL IOWA...
  CENTRAL MADISON COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 915 PM CDT

* AT 849 PM CDT...A CONFIRMED TORNADO WAS LOCATED 5 MILES NORTH OF
  WINTERSET...MOVING SOUTHEAST AT 30 MPH.

  HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

  SOURCE...PUBLIC 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...
  WINTERSET...DE SOTO...VAN METER...PATTERSON...BADGER CREEK STATE
  PARK AND WINTERSET-MADISON COUNTY AIRPORT.

THIS INCLUDES INTERSTATE 80 NEAR MILE MARKER 110.
 
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 4141 9418 4154 9401 4144 9379 4140 9379
      4120 9400
TIME...MOT...LOC 0149Z 314DEG 25KT 4142 9403 

TORNADO...OBSERVED
HAIL...1.00IN

$$

MS

2 follow-up statements

397 
WWUS53 KDMX 070201
SVSDMX

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

IAC049-070211-
/O.CAN.KDMX.TO.W.0051.000000T0000Z-140707T0215Z/
DALLAS IA-

901 PM CDT SUN JUL 6 2014

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

LAT...LON 4136 9414 4147 9385 4144 9379 4140 9379
      4120 9400
TIME...MOT...LOC 0201Z 314DEG 25KT 4136 9395 

$$

IAC121-070215-
/O.CON.KDMX.TO.W.0051.000000T0000Z-140707T0215Z/
MADISON IA-
901 PM CDT SUN JUL 6 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR CENTRAL
MADISON COUNTY...
    
AT 901 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR WINTERSET...
MOVING SOUTHEAST AT 30 MPH.

HAZARD...TORNADO. 

SOURCE...PUBLIC CONFIRMED TORNADO. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

LOCATIONS IMPACTED INCLUDE...
WINTERSET...PATTERSON AND WINTERSET-MADISON COUNTY AIRPORT. 

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 4136 9414 4147 9385 4144 9379 4140 9379
      4120 9400
TIME...MOT...LOC 0201Z 314DEG 25KT 4136 9395 

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

$$

MS

763 
WWUS53 KDMX 070212 RRA
SVSDMX

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

IAC121-070222-
/O.EXP.KDMX.TO.W.0051.000000T0000Z-140707T0215Z/
MADISON IA-
912 PM CDT SUN JUL 6 2014

...THE TORNADO WARNING FOR CENTRAL MADISON COUNTY WILL EXPIRE AT 915
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 4136 9414 4147 9385 4144 9379 4140 9379
      4120 9400
TIME...MOT...LOC 0210Z 314DEG 25KT 4136 9395 

$$

MS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer	41 min
Jul 6, 7:27 PM CDT	Special Weather Statement	DMX	Tama	48 min
Jul 6, 7:37 PM CDT	Special Weather Statement	DMX	Dallas	23 min
Jul 6, 7:50 PM CDT	Tornado Warning	DMX	Black Hawk, Grundy, Tama	25 min
Jul 6, 8:05 PM CDT	Tornado Warning Tornado observed	DMX	Black Hawk, Grundy, Tama	40 min
Jul 6, 8:28 PM CDT	Special Weather Statement	DMX	Madison	62 min
Jul 6, 8:40 PM CDT	Special Weather Statement	DMX	Madison	35 min
Jul 6, 8:45 PM CDT	Tornado Warning	DMX	Tama	30 min
Jul 6, 8:51 PM CDT	Tornado Warning	DMX	Jasper, Poweshiek	24 min
Jul 6, 9:10 PM CDT	Tornado Warning Tornado observed	DMX	Jasper, Mahaska, Poweshiek	35 min
Jul 6, 9:20 PM CDT	Special Weather Statement	DMX	Poweshiek	55 min
Jul 6, 9:22 PM CDT	Special Weather Statement	DMX	Mahaska	53 min
Jul 6, 9:24 PM CDT	Special Weather Statement	DMX	Madison	51 min
Jul 6, 9:45 PM CDT	Tornado Warning	DMX	Jasper, Mahaska, Poweshiek	13 min
Jul 6, 10:01 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	44 min
Jul 6, 10:18 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Wapello	42 min
Jul 6, 10:20 PM CDT	Tornado Warning	DMX	Mahaska, Marion	40 min
Jul 6, 10:26 PM CDT	Special Weather Statement	DMX	Decatur	34 min
Jul 6, 10:53 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	37 min
Jul 7, 3:38 AM CDT	Flash Flood Watch	DMX	Adair, Adams, Appanoose, Cass, Clarke, Davis and 6 more	19 hr
Jul 7, 5:24 PM CDT	Special Weather Statement	DMX	Adams	36 min
Jul 7, 6:27 PM CDT	Special Weather Statement	DMX	Adams, Taylor	48 min
Jul 7, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	40 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.