Alert archive / Iowa / Tornado Warnings in 2006

Tornado Warning 9, NWS Des Moines, IA

April 2, 2006Clarke County, Warren County, Iowa

NWS Des Moines, IA issued this tornado warning at Apr 2, 2006, 2:55 PM CDT for Clarke County, Warren County, Iowa. It was in force for 35 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, 2:55 PM CDT (19:55 UTC)
Expired: Apr 2, 2006, 3:30 PM CDT
In force: 35 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

Counties Clarke County, IA, Warren County, IA

The radar

The Des Moines radar (KDMX), 66 km from the middle of the area, began a volume at 19:57 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, 3:15 PM CDT	HAIL 0.75	Osceola, IA

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
Apr 2, 1:13 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.9 hours before the alert went out and 226 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: 4 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 76 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.

000 
WFUS53 KDMX 021955
TORDMX
IAC039-181-022030-
/O.NEW.KDMX.TO.W.0009.060402T1955Z-060402T2030Z/

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

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN CLARKE COUNTY IN SOUTH CENTRAL IOWA.
  SOUTHWESTERN WARREN COUNTY IN SOUTH CENTRAL IOWA.

* UNTIL 330 PM CDT.

* AT 253 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES NORTHEAST OF OSCEOLA...OR 35 MILES SOUTH
  OF DES MOINES...AND MOVING NORTHEAST AT 40 MPH.

* THE STORM WILL REMAIN OVER MAINLY RURAL AREAS OF EASTERN CLARKE AND
  SOUTHWESTERN WARREN COUNTIES.

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

THIS IS A HAZARDOUS SITUATION. SEEK SHELTER IN A BASEMENT...OR IN AN
INTERIOR ROOM. STAY AWAY FROM WINDOWS. IF YOU ARE OUTSIDE OR IN A
CAR...SEEK SHELTER IN A REINFORCED BUILDING.

LAT...LON 4106 9384 4091 9361 4117 9358 4128 9348
      4134 9374

$$

RUSSELL

3 follow-up statements

000 
WWUS53 KDMX 022008
SVSDMX

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

IAC039-181-022030-
/O.CON.KDMX.TO.W.0009.000000T0000Z-060402T2030Z/
WARREN IA-CLARKE IA-
308 PM CDT SUN APR 2 2006

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN CLARKE AND
SOUTHWESTERN WARREN COUNTIES UNTIL 330 PM CDT...

AT 306 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 12 MILES NORTHEAST OF OSCEOLA...OR 31 MILES SOUTH
OF DES MOINES...AND MOVING NORTHEAST AT 30 MPH.

THIS TORNADO WILL REMAIN OVER MAINLY RURAL AREAS OF EASTERN CLARKE
AND SOUTHWESTERN WARREN COUNTIES.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT SUNDAY
AFTERNOON FOR SOUTHWESTERN IOWA.

LAT...LON 4106 9384 4091 9361 4117 9358 4128 9348
      4134 9374

$$

000 
WWUS53 KDMX 022009
SVSDMX

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

IAC039-181-022030-
/O.CON.KDMX.TO.W.0009.000000T0000Z-060402T2030Z/
WARREN IA-CLARKE IA-
309 PM CDT SUN APR 2 2006

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN CLARKE AND
SOUTHWESTERN WARREN COUNTIES UNTIL 330 PM CDT...

AT 306 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 12 MILES NORTHEAST OF OSCEOLA...OR 31 MILES SOUTH
OF DES MOINES...AND MOVING NORTHEAST AT 30 MPH.

THIS TORNADO WILL REMAIN OVER MAINLY RURAL AREAS OF EASTERN CLARKE
AND SOUTHWESTERN WARREN COUNTIES.

WARREN COUNTY SPOTTERS REPORTED A FUNNEL CLOUD 3 MILES SOUTHEAST OF 
NEW VIRGINIA AT 306 PM. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT SUNDAY
AFTERNOON FOR SOUTHWESTERN IOWA.

LAT...LON 4106 9384 4091 9361 4117 9358 4128 9348
      4134 9374

$$

000 
WWUS53 KDMX 022023
SVSDMX

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

IAC039-181-022032-
/O.EXP.KDMX.TO.W.0009.000000T0000Z-060402T2030Z/
WARREN IA-CLARKE IA-
322 PM CDT SUN APR 2 2006

...THE TORNADO WARNING FOR EASTERN CLARKE COUNTY HAS BEEN ALLOWED TO 
EXPIRE...

AT 318 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE...THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE.

A TORNADO WARNING REMAINS IN EFFECT FOR WARREN COUNTY UNTIL 415 PM. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM CDT SUNDAY
AFTERNOON FOR SOUTHWESTERN IOWA.

LAT...LON 4106 9384 4091 9361 4117 9358 4128 9348
      4134 9374

$$

RUSSELL

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, 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, 4:01 PM CDT	Tornado Warning	DMX	Mahaska, Marion	44 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.