Alert archive / Iowa / Tornado Warnings in 2008

Tornado Warning 66, NWS Des Moines, IA

June 7, 2008Worth County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 7, 2008, 4:29 PM CDT for Worth County, Iowa. It was in force for 19 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: Jun 7, 2008, 4:29 PM CDT (21:29 UTC)
Expired: Jun 7, 2008, 4:48 PM CDT
In force: 19 min
Issued by: NWS Des Moines, IA
Area: Storm-based polygon

County Worth County, IA

The radar

The La Crosse radar (KARX), 157 km from the middle of the area, began a volume at 21:30 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
Jun 7, 4:35 PM CDT	TORNADO	3 Ese Northwood, IA	SMALL DEBRIS CLOUD

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
Jun 7, 12:17 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 162 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: 131 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 1341 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 318 m²/s²
0-3 km storm-relative helicity: 357 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 072129
TORDMX
IAC195-072200-
/O.NEW.KDMX.TO.W.0066.080607T2129Z-080607T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
429 PM CDT SAT JUN 7 2008

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN WORTH COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 500 PM CDT.

* AT 427 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  NORTHWOOD...OR 20 MILES NORTHWEST OF OSAGE...MOVING EAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  RURAL NORTHEASTERN WORTH COUNTY AT 440 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.

LAT...LON 4344 9302 4343 9301 4342 9302 4339 9302
      4338 9321 4349 9323 4351 9310 4351 9302
TIME...MOT...LOC 2129Z 260DEG 30KT 4345 9313

$$

COGIL

2 follow-up statements

000 
WWUS53 KDMX 072136
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
437 PM CDT SAT JUN 7 2008

IAC195-072200-
/O.CON.KDMX.TO.W.0066.000000T0000Z-080607T2200Z/
WORTH IA-
437 PM CDT SAT JUN 7 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHEASTERN WORTH COUNTY...

AT 432 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 6 MILES EAST OF
NORTHWOOD...OR 18 MILES NORTHWEST OF OSAGE...MOVING EAST AT 34 MPH.

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.

LAT...LON 4344 9302 4343 9301 4342 9302 4339 9302
      4338 9321 4349 9323 4351 9310 4351 9302
TIME...MOT...LOC 2137Z 260DEG 30KT 4346 9304

$$

COGIL

000 
WWUS53 KDMX 072148
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
446 PM CDT SAT JUN 7 2008

IAC195-072156-
/O.CAN.KDMX.TO.W.0066.000000T0000Z-080607T2200Z/
WORTH IA-
446 PM CDT SAT JUN 7 2008

...THE TORNADO WARNING FOR NORTHEASTERN WORTH COUNTY IS CANCELLED...

AT 441 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.

HOWEVER...ANOTHER TORNADO WARNING REMAINS IN EFFECT UNTIL 5 PM CDT 
FOR WESTERN WORTH. 

AT 435 PM CDT...A STORM CHASER REPORTED A TORNADO 2 MILES SOUTHEAST 
OF NORTHWOOD WITH SMALL DEBRIS CLOUD. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT SATURDAY EVENING
FOR NORTHERN IOWA.

LAT...LON 4344 9302 4343 9301 4342 9302 4339 9302
      4338 9321 4349 9323 4351 9310 4351 9302
TIME...MOT...LOC 2146Z 260DEG 30KT 4347 9294

$$

COGIL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 10:31 PM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	12 days
Jun 7, 4:32 AM CDT	Flash Flood Watch	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	46 hr
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Humboldt	13 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Webster	10 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Dallas, Polk	9 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Polk, Story	7 days
Jun 7, 9:44 AM CDT	River Flood Warning	DMX	Cerro Gordo, Floyd, Worth	11 days
Jun 7, 3:26 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	49 min
Jun 7, 3:34 PM CDT	Tornado Warning	DMX	Winnebago, Worth	26 min
Jun 7, 3:58 PM CDT	Tornado Warning	DMX	Winnebago, Worth	32 min
Jun 7, 3:59 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Kossuth, Winnebago	30 min
Jun 7, 4:03 PM CDT	Tornado Warning	DMX	Hancock, Kossuth, Winnebago	27 min
Jun 7, 4:25 PM CDT	Tornado Warning	DMX	Hancock, Winnebago, Worth	50 min
Jun 7, 4:32 PM CDT	Flash Flood Warning	DMX	Winnebago, Worth	6 hr
Jun 7, 4:33 PM CDT	Tornado Warning	DMX	Kossuth	28 min
Jun 7, 4:52 PM CDT	Tornado Warning	DMX	Hancock	23 min
Jun 7, 5:02 PM CDT	Tornado Warning	DMX	Worth	28 min
Jun 7, 5:16 PM CDT	Tornado Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	44 min
Jun 7, 5:50 PM CDT	Tornado Warning	DMX	Cerro Gordo, Worth	25 min
Jun 7, 5:52 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Sac	38 min
Jun 7, 6:00 PM CDT	Tornado Warning	DMX	Calhoun, Pocahontas	30 min
Jun 7, 6:11 PM CDT	Flash Flood Warning	DMX	Cerro Gordo, Hancock	12 hr
Jun 7, 6:17 PM CDT	Tornado Warning	DMX	Cerro Gordo	43 min
Jun 7, 6:32 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Webster	43 min
Jun 7, 6:42 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Wright	48 min
Jun 7, 6:46 PM CDT	Flash Flood Warning	DMX	Calhoun, Pocahontas, Sac	6 hr
Jun 7, 6:48 PM CDT	Tornado Warning	DMX	Calhoun, Pocahontas, Webster	27 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; radar from the NEXRAD Level II archive.