Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 76, NWS Twin Cities, MN

May 31, 2008Chisago County, Isanti County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 31, 2008, 6:17 PM CDT for Chisago County, Isanti County, Minnesota. It was in force for 58 min. 4 reports 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, 6:17 PM CDT (23:17 UTC)
Expired
May 31, 2008, 7:15 PM CDT
In force
58 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Chisago County, MN, Isanti County, MN

The radar

The Minneapolis radar (KMPX), 81 km from the middle of the area, began a volume at 23:19 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

TimeReportWhereRemark
May 31, 6:24 PM CDTHAIL 0.755 W Cambridge, MNHIGHWAY 95 AND RUM RIVER AT WALBO.
May 31, 6:34 PM CDTHAIL 0.75Isanti, MNCOUNTY ROAD 5 AND WHISKEY.
May 31, 6:35 PM CDTHAIL 0.752 Wsw Isanti, MN
May 31, 6:35 PM CDTHAIL 0.75Isanti, MN

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.

IssuedProductOfficeLasted
May 31, 2:51 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 82 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 2008-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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 2008-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
16 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
7 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 KMPX 312318
SVRMPX
MNC025-059-010015-
/O.NEW.KMPX.SV.W.0076.080531T2317Z-080601T0015Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  CENTRAL CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 715 PM CDT

* AT 615 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING PENNY SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES WEST OF CAMBRIDGE...OR
  ABOUT 9 MILES NORTHWEST OF ISANTI...AND MOVING SOUTHEAST AT 29 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CAMBRIDGE...
  ISANTI...
  NORTH BRANCH...
  ATHENS...

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.

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

LAT...LON 4543 9268 4542 9351 4557 9351 4572 9332
TIME...MOT...LOC 2317Z 310DEG 25KT 4559 9335

$$

MDB
1 follow-up statement
000 
WWUS53 KMPX 312333
SVSMPX

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

MNC025-059-010015-
/O.CON.KMPX.SV.W.0076.000000T0000Z-080601T0015Z/
ISANTI MN-CHISAGO MN-
634 PM CDT SAT MAY 31 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR CENTRAL CHISAGO AND SOUTHERN ISANTI COUNTIES...

AT 628 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING NICKEL SIZE HAIL AND DAMAGING
WINDS IN EXCESS OF 65 MPH.  THESE SEVERE THUNDERSTORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 3 MILES EAST OF CAMBRIDGE TO 4 MILES WEST
OF ISANTI...AND MOVING SOUTHEAST AT 29 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BODUM...ATHENS...NORTH
BRANCH...ISANTI...CAMBRIDGE AND BRANCH.

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.

LAT...LON 4543 9268 4542 9351 4557 9351 4565 9315
TIME...MOT...LOC 2334Z 310DEG 25KT 4555 9312 4547 9329

$$

MDB

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 7:09 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Waseca36 min
May 31, 2:24 PM CDTSevere Thunderstorm WarningMPXLe Sueur51 min
May 31, 3:08 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Rice, Steele, Waseca67 min
May 31, 4:15 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn, Steele, Waseca48 min
May 31, 4:15 PM CDTSevere Thunderstorm WarningMPXBenton, Sherburne60 min
May 31, 4:23 PM CDTSevere Thunderstorm WarningMPXMorrison67 min
May 31, 4:43 PM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs, Morrison62 min
May 31, 5:01 PM CDTSevere Thunderstorm WarningMPXSherburne, Wright59 min
May 31, 5:16 PM CDTTornado WarningMPXSherburne, Wright44 min
May 31, 5:25 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Ramsey65 min
May 31, 5:28 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Morrison62 min
May 31, 5:38 PM CDTTornado WarningMPXHennepin, Wright40 min
May 31, 6:26 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Ramsey, Scott50 min
May 31, 6:44 PM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs, Morrison46 min
May 31, 6:45 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Washington45 min
May 31, 6:55 PM CDTTornado WarningMPXAnoka, Chisago, Washington50 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008Every 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.