Alert archive / Iowa / Tornado Warnings in 2006

Tornado Warning 1, NWS Des Moines, IA

March 12, 2006Davis County, Iowa

NWS Des Moines, IA issued this tornado warning at Mar 12, 2006, 8:21 PM CST for Davis County, Iowa. It was in force for 24 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: Mar 12, 2006, 8:21 PM CST (02:21 UTC)
Expired: Mar 12, 2006, 8:45 PM CST
In force: 24 min
Issued by: NWS Des Moines, IA
Area: Counties, with a storm outline in the text

County Davis County, IA

The radar

The Des Moines radar (KDMX), 155 km from the middle of the area, began a volume at 02:23 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.

Issued	Product	Office	Lasted
Mar 12, 7:28 PM CST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.4 hours before the alert went out and 181 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: 653 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 756 m²/s²
0-3 km storm-relative helicity: 1064 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KDMX 130221
TORDMX
IAC051-130245-
/O.NEW.KDMX.TO.W.0001.060313T0221Z-060313T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
821 PM CST SUN MAR 12 2006

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN DAVIS COUNTY IN SOUTHEAST IOWA.

* UNTIL 845 PM CST.

* AT 819 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES SOUTHEAST OF BLOOMFIELD...OR 18 MILES
  NORTHWEST OF MEMPHIS...AND MOVING EAST AT 55 MPH.

* THE STORM WILL REMAIN OVER MAINLY RURAL AREAS OF EASTERN DAVIS
  COUNTY...INCLUDING THE LOCATION OF PULASKI.

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 4090 9246 4061 9246 4062 9220 4090 9219

$$

JOHNSON

2 follow-up statements

000 
WWUS53 KDMX 130230
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
830 PM CST SUN MAR 12 2006

IAC051-130245-
/O.CON.KDMX.TO.W.0001.000000T0000Z-060313T0245Z/
DAVIS IA-
830 PM CST SUN MAR 12 2006

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN DAVIS COUNTY UNTIL
845 PM CST...

AT 827 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES WEST OF MILTON...OR 17 MILES WEST OF
KEOSAUQUA...AND MOVING EAST AT 40 MPH.

THIS TORNADO WILL REMAIN OVER MAINLY RURAL AREAS OF EASTERN DAVIS
COUNTY...INCLUDING THE LOCATION OF PULASKI.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CST MONDAY
MORNING FOR SOUTHEASTERN IOWA.

LAT...LON 4090 9246 4061 9246 4062 9220 4090 9219

$$

JOHNSON

000 
WWUS53 KDMX 130244
SVSDMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
842 PM CST SUN MAR 12 2006

IAC051-130252-
/O.EXP.KDMX.TO.W.0001.000000T0000Z-060313T0245Z/
DAVIS IA-
842 PM CST SUN MAR 12 2006

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

AS 831 PM CST...THUNDERSTORMS WHICH PROMPTED THE WARNING HAVE MOVED 
EAST OF DAVIS COUNTY. THEREFORE...THE TORNADO WARNING HAS BEEN 
ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WARNING DOES REMAIN IN EFFECT FOR DAVIS COUNTY 
UNTIL 900 PM. ANOTHER ROUND OF SEVERE THUNDERSTORMS WILL MOVE 
NORTHEAST OUT OF MISSOURI.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CST MONDAY
MORNING FOR SOUTHEASTERN IOWA.

LAT...LON 4090 9246 4061 9246 4062 9220 4090 9219

$$

JOHNSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 6:58 PM CST	Severe Thunderstorm Warning	DMX	Polk	31 min
Mar 12, 7:02 PM CST	Severe Thunderstorm Warning	DMX	Davis	28 min
Mar 12, 7:25 PM CST	Severe Thunderstorm Warning	DMX	Appanoose, Davis	50 min
Mar 12, 7:53 PM CST	Severe Thunderstorm Warning	DMX	Wapello	52 min
Mar 12, 8:08 PM CST	Severe Thunderstorm Warning	DMX	Appanoose, Davis	52 min
Mar 12, 11:20 PM CST	Severe Thunderstorm Warning	DMX	Wapello	19 min
Mar 13, 12:04 AM CST	Severe Thunderstorm Warning	DMX	Marshall	26 min
Mar 13, 12:31 AM CST	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy	44 min
Mar 13, 7:32 AM CST	Wind Advisory	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 39 more	8 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.