Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 46, NWS Twin Cities, MN

May 29, 2007Todd County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 29, 2007, 3:31 PM CDT for Todd County, Minnesota. It was in force for 44 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
May 29, 2007, 3:31 PM CDT (20:31 UTC)
Expired
May 29, 2007, 4:15 PM CDT
In force
44 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Todd County, MN

The radar

The Minneapolis radar (KMPX), 192 km from the middle of the area, began a volume at 20:31 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 12:00Z, 8.5 hours before the alert went out and 190 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 12:00Z on 2007-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 574 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, Minneapolis, MN at 12:00Z on 2007-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.193958Sfc1 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
574 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 292032
SVRMPX
MNC153-292115-
/O.NEW.KMPX.SV.W.0046.070529T2031Z-070529T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
331 PM CDT TUE MAY 29 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TODD COUNTY IN CENTRAL MINNESOTA...

* UNTIL 415 PM CDT

* AT 327 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...   
  SOON TO BE CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING     
  WINDS.  THIS STORM WAS LOCATED 11 MILES WEST OF EAGLE BEND...OR    
  ABOUT 19 MILES NORTH OF ALEXANDRIA...AND MOVING NORTHEAST AT 25    
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  EAGLE BEND...
  BERTHA...
  STAPLES...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4618 9515 4605 9515 4618 9499 4637 9478
      4637 9516

$$
3 follow-up statements
000 
WWUS53 KMPX 292048
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
348 PM CDT TUE MAY 29 2007

MNC153-292115-
/O.CON.KMPX.SV.W.0046.000000T0000Z-070529T2115Z/
TODD MN-
348 PM CDT TUE MAY 29 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR TODD COUNTY...

AT 344 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING 
WINDS. THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF BERTHA...AND 
MOVING NORTHEAST AT 20 MPH. THE STRONGEST PART OF THIS STORM SHOULD 
REMAIN OVER NORTHWEST TODD COUNTY.

OTHER LOCATIONS IN THE WARNING INCLUDE HEWITT AND BERTHA.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4637 9516 4615 9515 4623 9500 4637 9481

$$
000 
WWUS53 KMPX 292102
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
401 PM CDT TUE MAY 29 2007

MNC153-292115-
/O.CON.KMPX.SV.W.0046.000000T0000Z-070529T2115Z/
TODD MN-
401 PM CDT TUE MAY 29 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR TODD COUNTY...

AT 401 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL AND 
DAMAGING WINDS. THIS STORM WAS LOCATED 3 MILES WEST OF BERTHA...AND 
MOVING NORTHEAST AT 20 MPH. THE STRONGEST PART OF THIS STORM WILL 
REMAIN OVER FAR NORTHWESTERN TODD COUNTY.

LOCATIONS IN THE WARNING INCLUDE HEWITT AND BERTHA.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4637 9516 4615 9515 4623 9500 4637 9484

$$
000 
WWUS53 KMPX 292113
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
413 PM CDT TUE MAY 29 2007

MNC153-292123-
/O.EXP.KMPX.SV.W.0046.000000T0000Z-070529T2115Z/
TODD MN-
413 PM CDT TUE MAY 29 2007

...THE SEVERE THUNDERSTORM WARNING FOR TODD COUNTY EXPIRES AT 415 PM
CDT...

SEVERE STORMS HAVE WEAKENED IN FAR NORTHWEST TODD COUNTY. 
HOWEVER...MORE THUNDERSTORMS WILL DEVELOP THROUGHOUT THE COUNTY 
DURING THE REMAINDER OF THE AFTERNOON. REMAIN ALERT FOR POSSIBLE 
ADDITIONAL WARNINGS.

REPORT ANY SEVERE WEATHER TO YOUR LAW ENFORCEMENT FOR RELAY TO THE 
NATIONAL WEATHER SERVICE.

LAT...LON 4637 9516 4615 9515 4623 9500 4637 9484

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 3:22 PM CDTSevere Thunderstorm WarningMPXDouglas23 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning 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.