Alert archive / Iowa / Tornado Warnings in 2006

Tornado Warning 13, NWS Des Moines, IA

April 2, 2006Mahaska County, Marion County, Iowa

NWS Des Moines, IA issued this tornado warning at Apr 2, 2006, 4:01 PM CDT for Mahaska County, Marion County, Iowa. It was in force for 44 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: Apr 2, 2006, 4:01 PM CDT (21:01 UTC)
Expired: Apr 2, 2006, 4:45 PM CDT
In force: 44 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

Counties Mahaska County, IA, Marion County, IA

The radar

The Des Moines radar (KDMX), 76 km from the middle of the area, began a volume at 21:01 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
Apr 2, 4:20 PM CDT	HAIL 0.88	10 Se Knoxville, IA

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, 9.0 hours before the alert went out and 212 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 257 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.

000 
WFUS53 KDMX 022101
TORDMX
IAC123-125-022145-
/O.NEW.KDMX.TO.W.0013.060402T2101Z-060402T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
401 PM CDT SUN APR 2 2006

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  MARION COUNTY IN SOUTH CENTRAL IOWA.
  WESTERN MAHASKA COUNTY IN SOUTH CENTRAL IOWA.

* UNTIL 445 PM CDT.

* AT 356 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 9 MILES SOUTHEAST OF KNOXVILLE...OR 33 MILES
  NORTHWEST OF OTTUMWA...AND MOVING NORTHEAST AT 30 MPH.

* THIS STORM WILL BE...
  NEAR HARVEY BY 410 PM CDT.
  NEAR LEIGHTON BY 420 PM CDT.

THE LOCATIONS OF MARYSVILLE AND BUSSEY ARE ALSO IN THE PATH.

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA. GO TO A BASEMENT OR SMALL INTERIOR
ROOM ON THE LOWEST FLOOR

LAT...LON 4117 9323 4116 9268 4151 9268 4151 9323

$$

VACHALEK

2 follow-up statements

000 
WWUS53 KDMX 022132
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
431 PM CDT SUN APR 2 2006

IAC123-125-022145-
/O.CON.KDMX.TO.W.0013.000000T0000Z-060402T2145Z/
MAHASKA IA-MARION IA-
431 PM CDT SUN APR 2 2006

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN MARION AND
NORTHWESTERN MAHASKA COUNTIES UNTIL 445 PM CDT...

...THE TORNADO WARNING HAS BEEN CANCELLED FOR THE REMAINDER OF 
MARION AND MAHASKA COUNTIES.

AT 430 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR PELLA...OR 33 MILES WEST OF SIGOURNEY...AND
MOVING NORTHEAST AT 30 MPH.

THIS TORNADO WILL REMAIN OVER MAINLY RURAL AREAS OF NORTHEASTERN
MARION AND NORTHWESTERN MAHASKA COUNTIES...INCLUDING THE LOCATION OF
PELLA.

IF IN THE PATH OF THIS TORNADO...TAKE SHELTER IN A BASEMENT OR SMALL 
INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEASTERN IOWA.

LAT...LON 4131 9304 4131 9268 4151 9268 4151 9304

$$

VACHALEK

000 
WWUS53 KDMX 022142
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
442 PM CDT SUN APR 2 2006

IAC123-125-022152-
/O.EXP.KDMX.TO.W.0013.000000T0000Z-060402T2145Z/
MAHASKA IA-MARION IA-
442 PM CDT SUN APR 2 2006

...THE TORNADO WARNING FOR MARION AND MAHASKA COUNTIES HAS BEEN
ALLOWED TO EXPIRE...

AT 439 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE WEAKENED...AND NO
LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THEREFORE...THE
TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

IF SEVERE WEATHER WAS OBSERVED...CONTACT THE NATIONAL WEATHER SERVICE
OFFICE IN DES MOINES AT 1-800-759-9276.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SUNDAY EVENING FOR
SOUTHEASTERN IOWA.

LAT...LON 4116 9333 4150 9332 4151 9243 4116 9242

$$

VACHALEK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 12:14 AM CST	Severe Thunderstorm Warning	DMX	Audubon, Cass	46 min
Apr 2, 12:30 AM CST	Severe Thunderstorm Warning	DMX	Sac	37 min
Apr 2, 1:31 AM CST	Severe Thunderstorm Warning	DMX	Greene	20 min
Apr 2, 2:33 PM CDT	Severe Thunderstorm Warning	DMX	Clarke	42 min
Apr 2, 2:41 PM CDT	Severe Thunderstorm Warning	DMX	Wayne	24 min
Apr 2, 2:46 PM CDT	Severe Thunderstorm Warning	DMX	Warren	59 min
Apr 2, 2:55 PM CDT	Tornado Warning	DMX	Clarke, Warren	35 min
Apr 2, 3:02 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	38 min
Apr 2, 3:04 PM CDT	Severe Thunderstorm Warning	DMX	Lucas	41 min
Apr 2, 3:10 PM CDT	Severe Thunderstorm Warning	DMX	Monroe	36 min
Apr 2, 3:16 PM CDT	Tornado Warning	DMX	Warren	27 min
Apr 2, 3:22 PM CDT	Tornado Warning	DMX	Davis	38 min
Apr 2, 3:40 PM CDT	Wind Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	12 hr
Apr 2, 3:50 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	25 min
Apr 2, 3:54 PM CDT	Severe Thunderstorm Warning	DMX	Marion	51 min
Apr 2, 3:57 PM CDT	Tornado Warning	DMX	Davis	18 min
Apr 2, 4:29 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	46 min
Apr 2, 4:38 PM CDT	Tornado Warning	DMX	Warren	37 min
Apr 2, 4:52 PM CDT	Tornado Warning	DMX	Polk	23 min
Apr 2, 5:11 PM CDT	Tornado Warning	DMX	Jasper, Polk	34 min
Apr 2, 5:41 PM CDT	Tornado Warning	DMX	Jasper	34 min

Nearby

Tornado Warnings in Iowa, 2006 Every tornado warning in 2006 Tornadoes in 2006

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.