Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 21, NWS Sioux Falls, SD

March 23, 2009Jackson County, Minnesota; Dickinson County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Mar 23, 2009, 9:03 PM CDT for Jackson County, Minnesota; Dickinson County, Iowa. It was in force for 30 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 23, 2009, 9:03 PM CDT (02:03 UTC)
Expired
Mar 23, 2009, 9:33 PM CDT
In force
30 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon

Counties Dickinson County, IA, Jackson County, MN

The radar

The Sioux Falls radar (KFSD), 144 km from the middle of the area, began a volume at 02:05 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.1 hours before the alert went out and 182 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, Minneapolis, MN at 00:00Z on 2009-03-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2009-03-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 677 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
719 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
677 m²/s²
0-3 km storm-relative helicity
728 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 
WUUS53 KFSD 240203
SVRFSD
IAC059-MNC063-240245-
/O.NEW.KFSD.SV.W.0021.090324T0203Z-090324T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
903 PM CDT MON MAR 23 2009

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN DICKINSON COUNTY IN NORTHWEST IOWA
  EASTERN JACKSON COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 945 PM CDT

* AT 901 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 70 MPH. THIS STORM WAS LOCATED 3 MILES EAST OF MILFORD...OR 7
  MILES SOUTH OF SPIRIT LAKE...AND WAS MOVING NORTH AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SPIRIT LAKE...ORLEANS AROUND 910 PM CDT...
  SUPERIOR AROUND 915 PM CDT...
  JACKSON AROUND 930 PM CDT...
  BERGEN AROUND 945 PM CDT...

THIS REPLACES THE PREVIOUS WARNING FOR DICKINSON COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF DAMAGING WINDS. SEEK SHELTER NOW 
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

&&

LAT...LON 4350 9488 4349 9491 4343 9491 4327 9498
      4332 9520 4384 9508 4384 9485 4359 9485
TIME...MOT...LOC 0203Z 200DEG 37KT 4334 9508

$$

CHAPMAN
2 follow-up statements
000 
WWUS53 KFSD 240217
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
917 PM CDT MON MAR 23 2009

IAC059-240227-
/O.CAN.KFSD.SV.W.0021.000000T0000Z-090324T0245Z/
DICKINSON IA-
917 PM CDT MON MAR 23 2009

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DICKINSON COUNTY IS
CANCELLED...

THE STORM HAS MOVED NORTH OF THE AREA INTO JACKSON COUNTY.

LAT...LON 4351 9488 4350 9516 4384 9508 4384 9485
      4359 9485
TIME...MOT...LOC 0217Z 193DEG 52KT 4372 9503

$$

MNC063-240245-
/O.CON.KFSD.SV.W.0021.000000T0000Z-090324T0245Z/
JACKSON MN-
917 PM CDT MON MAR 23 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR EASTERN JACKSON COUNTY...

AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR JACKSON...MOVING NORTH
AT 60 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BERGEN AROUND 925 PM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS. THIS IS AN
EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4351 9488 4350 9516 4384 9508 4384 9485
      4359 9485
TIME...MOT...LOC 0217Z 193DEG 52KT 4372 9503

$$

CHAPMAN
000 
WWUS53 KFSD 240233
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
933 PM CDT MON MAR 23 2009

MNC063-240243-
/O.CAN.KFSD.SV.W.0021.000000T0000Z-090324T0245Z/
JACKSON MN-
933 PM CDT MON MAR 23 2009

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN JACKSON COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER
APPEARED TO BE SEVERE.

LAT...LON 4351 9488 4350 9516 4384 9508 4384 9485
      4359 9485
TIME...MOT...LOC 0233Z 193DEG 52KT 4395 9495

$$

CHAPMAN

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 23, 8:45 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson30 min
Mar 24, 3:25 AM CDTWind AdvisoryFSDPlymouth, Woodbury21 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2009Severe Thunderstorm Warnings in Iowa, 2009Every severe thunderstorm warning in 2009

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.