Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 83, NWS Twin Cities, MN

May 31, 2008Ramsey County, Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at May 31, 2008, 7:40 PM CDT for Ramsey County, Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin. It was in force for 47 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: May 31, 2008, 7:40 PM CDT (00:40 UTC)
Expired: May 31, 2008, 8:27 PM CDT
In force: 47 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Ramsey County, MN, Washington County, MN, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 80 km from the middle of the area, began a volume at 00:42 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
May 31, 8:04 PM CDT	TSTM WND DMG	3 Nnw Stillwater, MN	FIVE TREES UPROOTED AND ONE SNAPPED NEAR 96TH STREET AND NOREL AVE.

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
May 31, 2:51 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.7 hours before the alert went out and 83 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: 137 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 2074 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 153 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 
WUUS53 KMPX 010041
SVRMPX
MNC123-163-WIC093-109-010145-
/O.NEW.KMPX.SV.W.0083.080601T0040Z-080601T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
740 PM CDT SAT MAY 31 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHERN PIERCE COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 845 PM CDT

* AT 737 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR STILLWATER...OR ABOUT OVER
  STILLWATER...AND MOVING SOUTHEAST AT 31 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WOODBURY...
  NEW RICHMOND...
  HUDSON...
  COTTAGE GROVE...
  PRESCOTT...
  RIVER FALLS...
  BALDWIN...
  ELLSWORTH...
  SPRING VALLEY...
  ELMWOOD...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
SATURDAY EVENING FOR SOUTHERN MINNESOTA.

LAT...LON 4503 9214 4470 9214 4471 9273 4483 9295
      4501 9314 4520 9263
TIME...MOT...LOC 0040Z 315DEG 27KT 4503 9277

$$

MDB

2 follow-up statements

000 
WWUS53 KMPX 010102
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
801 PM CDT SAT MAY 31 2008

MNC123-010111-
/O.CAN.KMPX.SV.W.0083.000000T0000Z-080601T0145Z/
RAMSEY MN-
801 PM CDT SAT MAY 31 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RAMSEY COUNTY IS
CANCELLED...

DOPPLER RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED OR MOVED
OUT OF THE WARNED AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING 
HAS BEEN CANCELLED. ADDITIONAL STRONG THUNDERSTORMS ARE IN THE 
AREA...BE ALERT FOR POSSIBLE ADDITIONAL WARNINGS AND STATEMENTS.

LAT...LON 4471 9273 4480 9289 4482 9294 4489 9295
      4510 9271 4494 9215 4470 9214
TIME...MOT...LOC 0101Z 315DEG 27KT 4492 9262

$$

MNC163-WIC093-109-010145-
/O.CON.KMPX.SV.W.0083.000000T0000Z-080601T0145Z/
WASHINGTON MN-ST. CROIX WI-PIERCE WI-
801 PM CDT SAT MAY 31 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHERN PIERCE...SOUTHERN ST. CROIX AND SOUTHERN WASHINGTON
COUNTIES...

AT 759 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM...CAPABLE OF PRODUCING PENNY SIZE HAIL AND DAMAGING 
WINDS IN EXCESS OF 60 MPH.  THIS SEVERE THUNDERSTORM WAS LOCATED 3 
MILES EAST OF HUDSON...AND MOVING SOUTHEAST AT 31 MPH. AN ADDITIONAL 
SEVERE THUNDERSTORM WAS LOCATED NEAR WOODBURY AND AFTON AND MOVING 
SOUTHEAST.

OTHER LOCATIONS IN THE WARNING INCLUDE NORTH HUDSON...MARTEL...
HOULTON...BURKHARDT...BOARDMAN...BELDENVILLE...OAK PARK 
HEIGHTS...WOODBURY...LAKELAND RIVER FALLS AND LAKE ELMO.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE 
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE 
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4471 9273 4480 9289 4482 9294 4489 9295
      4510 9271 4494 9215 4470 9214
TIME...MOT...LOC 0101Z 315DEG 27KT 4492 9262

$$

MDB

000 
WWUS53 KMPX 010127
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
827 PM CDT SAT MAY 31 2008

MNC163-WIC093-109-010137-
/O.CAN.KMPX.SV.W.0083.000000T0000Z-080601T0145Z/
WASHINGTON MN-ST. CROIX WI-PIERCE WI-
827 PM CDT SAT MAY 31 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN PIERCE...SOUTHERN ST.
CROIX AND SOUTHERN WASHINGTON COUNTIES IS CANCELLED...

DOPPLER RADAR INDICATED THAT THE SEVERE STORM HAD MOVED OUT OF THE 
WARNED AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELLED.

LAT...LON 4471 9273 4480 9289 4482 9294 4489 9295
      4510 9271 4494 9215 4470 9214
TIME...MOT...LOC 0127Z 315DEG 27KT 4478 9243

$$

MB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:00 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	44 min
May 31, 7:18 PM CDT	Tornado Warning	MPX	Anoka, Ramsey, Washington	30 min
May 31, 7:23 PM CDT	Tornado Warning	MPX	Washington	32 min
May 31, 7:29 PM CDT	Severe Thunderstorm Warning	MPX	Sibley	19 min
May 31, 7:32 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	43 min
May 31, 8:21 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008 Severe Thunderstorm Warnings in Wisconsin, 2008 Every severe thunderstorm warning 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.