Alert archive / Iowa / Tornado Warnings in 2007

Tornado Warning 13, NWS Des Moines, IA

June 7, 2007Clarke County, Decatur County, Iowa

NWS Des Moines, IA issued this tornado warning at Jun 7, 2007, 11:44 AM CDT for Clarke County, Decatur County, Iowa. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 7, 2007, 11:44 AM CDT (16:44 UTC)
Expired
Jun 7, 2007, 12:15 PM CDT
In force
31 min
Issued by
NWS Des Moines, IA
Area
Counties, with a storm outline in the text

Counties Clarke County, IA, Decatur County, IA

The radar

The Des Moines radar (KDMX), 77 km from the middle of the area, began a volume at 16:45 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 7, 11:34 AM CDTTornado Watch PDSSPC10 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 4.7 hours before the alert went out and 221 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2007-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 237 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2007-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
237 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1177 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 071643
TORDMX
IAC039-053-071715-
/O.NEW.KDMX.TO.W.0013.070607T1644Z-070607T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1144 AM CDT THU JUN 7 2007

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  CLARKE COUNTY IN SOUTH CENTRAL IOWA...
  NORTHWESTERN DECATUR COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 1215 PM CDT

* AT 1140 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 20 MILES
  SOUTHWEST OF OSCEOLA...OR ABOUT 39 MILES NORTH OF BETHANY...MOVING
  NORTHEAST AT 60 MPH.

* THE TORNADO WILL BE NEAR...
  OSCEOLA BY NOON CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

FUNNEL CLOUDS HAVE BEEN REPORTED WITH THIS STORM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING
FOR IOWA.

LAT...LON 4116 9368 4116 9357 4096 9356 4081 9402
      4097 9402

$$

JUNGBLUTH
2 follow-up statements
000 
WWUS53 KDMX 071701
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1200 PM CDT THU JUN 7 2007

IAC053-071710-
/O.CAN.KDMX.TO.W.0013.000000T0000Z-070607T1715Z/
DECATUR IA-
1200 PM CDT THU JUN 7 2007

...THE TORNADO WARNING FOR NORTHWESTERN DECATUR COUNTY IS
CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING
FOR IOWA.

LAT...LON 4091 9391 4104 9390 4116 9368 4116 9357
      4114 9358 4113 9357 4096 9357 4090 9380

$$

IAC039-071715-
/O.CON.KDMX.TO.W.0013.000000T0000Z-070607T1715Z/
CLARKE IA-
1200 PM CDT THU JUN 7 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT FOR CLARKE
COUNTY...

AT 1157 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 8 MILES SOUTHWEST OF
OSCEOLA...OR ABOUT 46 MILES SOUTH OF DES MOINES...MOVING NORTHEAST AT
45 MPH.

THE TORNADO WILL BE NEAR...
  OSCEOLA BY 1205 PM CDT...
  WOODBURN BY 1215 PM CDT...

IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO 
THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF 
DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING
FOR IOWA.

LAT...LON 4091 9391 4104 9390 4116 9368 4116 9357
      4114 9358 4113 9357 4096 9357 4090 9380

$$

JUNGBLUTH
000 
WWUS53 KDMX 071719
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1218 PM CDT THU JUN 7 2007

IAC039-071728-
/O.EXP.KDMX.TO.W.0013.000000T0000Z-070607T1715Z/
CLARKE IA-
1218 PM CDT THU JUN 7 2007

...THE TORNADO WARNING FOR EASTERN CLARKE COUNTY EXPIRED AT 1215 PM
CDT...

THE STORM WHICH PROMPTED THE TORNADO WARNING HAS MOVED NORTHEAST. IF 
A TORNADO OR DAMAGE OCCURRED IN YOUR AREA...PLEASE CALL LOCAL LAW 
ENFORCEMENT FOR RELAY OF THE REPORT TO THE NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT THURSDAY EVENING
FOR IOWA.

LAT...LON 4091 9391 4104 9390 4116 9368 4116 9357
      4114 9358 4113 9357 4096 9357 4090 9380

$$

JUNGBLUTH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 3:47 AM CDTWind AdvisoryDMXAudubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 27 more16 hr
Jun 7, 11:27 AM CDTTornado WarningDMXRinggold22 min
Jun 7, 12:17 PM CDTTornado WarningDMXLucas28 min
Jun 7, 12:28 PM CDTTornado WarningDMXMarion, Warren47 min
Jun 7, 1:14 PM CDTSevere Thunderstorm WarningDMXLucas, Wayne35 min
Jun 7, 1:17 PM CDTSevere Thunderstorm WarningDMXMarion43 min
Jun 7, 2:14 PM CDTSevere Thunderstorm WarningDMXMahaska19 min
Jun 7, 2:20 PM CDTTornado WarningDMXAppanoose, Monroe, Wayne25 min
Jun 7, 3:02 PM CDTSevere Thunderstorm WarningDMXAppanoose, Monroe28 min
Jun 7, 3:18 PM CDTSevere Thunderstorm WarningDMXWapello26 min

Nearby

Tornado Warnings in Iowa, 2007Every tornado warning in 2007Tornadoes in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.