Alert archive / Iowa / Tornado Warnings in 2008

Tornado Warning 18, NWS Des Moines, IA

May 25, 2008Clarke County, Lucas County, Iowa

NWS Des Moines, IA issued this tornado warning at May 25, 2008, 6:12 PM CDT for Clarke County, Lucas County, Iowa. It was in force for 48 min. 2 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 25, 2008, 6:12 PM CDT (23:12 UTC)
Expired: May 25, 2008, 7:00 PM CDT
In force: 48 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

Counties Clarke County, IA, Lucas County, IA

What was reported inside it

Time	Report	Where	Remark
May 25, 6:25 PM CDT	TORNADO	6 Se Osceola, IA
May 25, 6:30 PM CDT	TORNADO	2 Se Osceola, IA	TORNADO REPORTED SOUTHEAST OF OSCEOLA AT 270TH STREET.

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 25, 3:30 PM CDT	Tornado Watch PDS	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.2 hours before the alert went out and 232 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: 1607 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 16.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 252312
TORDMX
IAC039-117-260000-
/O.NEW.KDMX.TO.W.0018.080525T2312Z-080526T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
612 PM CDT SUN MAY 25 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CLARKE COUNTY IN SOUTH CENTRAL IOWA...
  WESTERN LUCAS COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 700 PM CDT.

* AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES
  SOUTHWEST OF WOODBURN...OR 45 MILES SOUTH OF DES MOINES...MOVING
  NORTHEAST AT 24 MPH.

* THE TORNADO WILL BE NEAR...
  WOODBURN BY 635 PM CDT...
  LUCAS BY 650 PM CDT...
  CHARITON AIRPORT BY 700 PM CDT...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR
NORTHWESTERN IOWA.

LAT...LON 4093 9391 4116 9356 4103 9324 4090 9354
      4090 9363
TIME...MOT...LOC 2312Z 241DEG 21KT 4094 9372

$$

JOHNSON

3 follow-up statements

000 
WWUS53 KDMX 252322
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
622 PM CDT SUN MAY 25 2008

IAC039-117-260000-
/O.CON.KDMX.TO.W.0018.000000T0000Z-080526T0000Z/
LUCAS IA-CLARKE IA-
622 PM CDT SUN MAY 25 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN CLARKE AND WESTERN LUCAS COUNTIES...

AT 617 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 8 MILES SOUTHWEST OF
WOODBURN...OR 44 MILES SOUTH OF DES MOINES...MOVING NORTHEAST AT 26
MPH.

THE TORNADO WILL BE NEAR...
  WOODBURN BY 635 PM CDT...
  LUCAS BY 650 PM CDT...
  6 MILES NORTHWEST OF CHARITON AIRPORT AND 8 MILES NORTHWEST OF
  CHARITON BY 700 PM CDT...

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

A FUNNEL CLOUD WAS EXTENDING TO NEAR THE GROUND 4 MILES SOUTHEAST OF 
OSCEOLA AT 619 PM. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR
NORTHWESTERN IOWA.

LAT...LON 4093 9391 4116 9356 4103 9324 4090 9354
      4090 9363
TIME...MOT...LOC 2322Z 237DEG 23KT 4097 9368

$$

JOHNSON

000 
WWUS53 KDMX 252332
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
631 PM CDT SUN MAY 25 2008

IAC039-117-260000-
/O.CON.KDMX.TO.W.0018.000000T0000Z-080526T0000Z/
LUCAS IA-CLARKE IA-
631 PM CDT SUN MAY 25 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN CLARKE AND WESTERN LUCAS COUNTIES...

AT 630 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS
TORNADO WAS LOCATED NEAR WOODBURN...OR 41 MILES SOUTH OF DES
MOINES...MOVING NORTHEAST AT 25 MPH.

THE TORNADO WILL BE NEAR...
  LUCAS BY 655 PM CDT...
  CHARITON AIRPORT AND 7 MILES NORTHWEST OF CHARITON BY 700 PM CDT...

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

AT 625...SPOTTERS REPORTED A TORNADO 6 MILES SOUTHEAST OF OSCEOLA.  

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR
NORTHWESTERN IOWA.

LAT...LON 4093 9391 4116 9356 4103 9324 4090 9354
      4090 9363
TIME...MOT...LOC 2331Z 243DEG 21KT 4098 9362

$$

000 
WWUS53 KDMX 252350
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
649 PM CDT SUN MAY 25 2008

IAC039-252359-
/O.CAN.KDMX.TO.W.0018.000000T0000Z-080526T0000Z/
CLARKE IA-
649 PM CDT SUN MAY 25 2008

...THE TORNADO WARNING FOR SOUTHEASTERN CLARKE COUNTY IS CANCELLED...

AT 646 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE EITHER WEAKENED OR
MOVED OUT OF THE AREA...AND NO LONGER POSE AN IMMEDIATE THREAT TO
LIFE OR PROPERTY. THEREFORE...THE TORNADO WARNING HAS BEEN CANCELLED.


A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING
FOR IOWA. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM CDT
SUNDAY EVENING FOR NORTHWESTERN IOWA.

LAT...LON 4116 9356 4116 9355 4103 9324 4090 9354
      4090 9356
TIME...MOT...LOC 2349Z 243DEG 21KT 4103 9350

$$

IAC117-260000-
/O.CON.KDMX.TO.W.0018.000000T0000Z-080526T0000Z/
LUCAS IA-
649 PM CDT SUN MAY 25 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR WESTERN
LUCAS COUNTY...

AT 646 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS
TORNADO WAS LOCATED NEAR LUCAS...OR 39 MILES SOUTH OF DES MOINES...
MOVING NORTHEAST AT 24 MPH.

THE TORNADO WILL BE NEAR...
  LUCAS BY 655 PM CDT...
  CHARITON AIRPORT AND 6 MILES NORTHWEST OF CHARITON BY 700 PM CDT...

AT 648 PM...WOOBDURN FIRE DEPARTMENT REPORTED FUNNEL CLOUDS 
SOUTHEAST OF WOODBURN. 


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



A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SUNDAY EVENING
FOR IOWA. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM CDT
SUNDAY EVENING FOR NORTHWESTERN IOWA.

LAT...LON 4116 9356 4116 9355 4103 9324 4090 9354
      4090 9356
TIME...MOT...LOC 2349Z 243DEG 21KT 4103 9350

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 3:38 PM CDT	Severe Thunderstorm Warning	DMX	Franklin, Wright	52 min
May 25, 4:03 PM CDT	Tornado Warning	DMX	Cerro Gordo, Franklin	42 min
May 25, 4:16 PM CDT	Severe Thunderstorm Warning	DMX	Franklin	28 min
May 25, 4:17 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hardin	43 min
May 25, 4:22 PM CDT	Tornado Warning	DMX	Butler, Franklin, Grundy, Hardin	23 min
May 25, 4:46 PM CDT	Tornado Warning	DMX	Butler, Grundy	44 min
May 25, 5:04 PM CDT	Tornado Warning	DMX	Black Hawk, Bremer	56 min
May 25, 5:21 PM CDT	Tornado Warning	DMX	Black Hawk, Bremer	24 min
May 25, 5:27 PM CDT	Tornado Warning	DMX	Butler	14 min
May 25, 5:37 PM CDT	Tornado Warning	DMX	Black Hawk	38 min
May 25, 5:47 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas	43 min
May 25, 5:49 PM CDT	Severe Thunderstorm Warning	DMX	Bremer	26 min
May 25, 6:54 PM CDT	Tornado Warning	DMX	Lucas	36 min

Nearby

Tornado Warnings in Iowa, 2008 Every tornado warning in 2008 Tornadoes in 2008

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.