Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 271, NWS Twin Cities, MN

August 3, 2008Chisago County, Isanti County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 3, 2008, 4:29 PM CDT for Chisago County, Isanti County, Minnesota. It was in force for 20 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
Aug 3, 2008, 4:29 PM CDT (21:29 UTC)
Expired
Aug 3, 2008, 4:49 PM CDT
In force
20 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Chisago County, MN, Isanti County, MN

The radar

The Minneapolis radar (KMPX), 94 km from the middle of the area, began a volume at 21:30 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
Aug 3, 4:30 PM CDTHAIL 11 Se Cambridge, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.5 hours before the alert went out and 96 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 2008-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2008-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 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
1041 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 032129
SVRMPX
MNC025-059-032215-
/O.NEW.KMPX.SV.W.0271.080803T2129Z-080803T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
429 PM CDT SUN AUG 3 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 515 PM CDT

* AT 425 PM CDT...TRAINED SPOTTERS REPORTED A SEVERE THUNDERSTORM
  WITH QUARTER SIZE HAIL.  THIS STORM WAS LOCATED NEAR CAMBRIDGE...OR
  ABOUT OVER CAMBRIDGE...AND MOVING EAST AT 41 MPH.

* SOME LOCATIONS INCLUDE...
  NORTH BRANCH...
  HARRIS...
  RUSH CITY...

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

REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4547 9328 4565 9331 4571 9286 4567 9285
      4564 9289 4557 9287 4557 9276 4554 9272
      4550 9270
TIME...MOT...LOC 2130Z 263DEG 35KT 4557 9315

$$

KAT
2 follow-up statements
000 
WWUS53 KMPX 032141
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
441 PM CDT SUN AUG 3 2008

MNC059-032150-
/O.CAN.KMPX.SV.W.0271.000000T0000Z-080803T2215Z/
ISANTI MN-
440 PM CDT SUN AUG 3 2008

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

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

LAT...LON 4548 9303 4555 9303 4556 9313 4567 9313
      4571 9286 4567 9285 4564 9289 4557 9287
      4557 9276 4550 9270
TIME...MOT...LOC 2140Z 261DEG 36KT 4559 9301

$$

MNC025-032215-
/O.CON.KMPX.SV.W.0271.000000T0000Z-080803T2215Z/
CHISAGO MN-
440 PM CDT SUN AUG 3 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHERN CHISAGO COUNTY...

AT 439 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING PENNY SIZE HAIL.  THE SEVERE STORM WAS LOCATED
NEAR HARRIS...OR ABOUT OVER HARRIS...AND MOVING EAST AT 41 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE RUSH CITY...NORTH BRANCH...
HARRIS AND BRANCH.

PREPARE IMMEDIATELY FOR LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4548 9303 4555 9303 4556 9313 4567 9313
      4571 9286 4567 9285 4564 9289 4557 9287
      4557 9276 4550 9270
TIME...MOT...LOC 2140Z 261DEG 36KT 4559 9301

$$

KAT
000 
WWUS53 KMPX 032149
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
449 PM CDT SUN AUG 3 2008

MNC025-032159-
/O.CAN.KMPX.SV.W.0271.000000T0000Z-080803T2215Z/
CHISAGO MN-
449 PM CDT SUN AUG 3 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CHISAGO COUNTY IS
CANCELLED...

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

LAT...LON 4548 9303 4555 9303 4556 9313 4567 9313
      4571 9286 4567 9285 4564 9289 4557 9287
      4557 9276 4550 9270
TIME...MOT...LOC 2149Z 261DEG 36KT 4560 9288

$$

KAT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 11:12 AM CDTSevere Thunderstorm WarningMPXSherburne, Stearns, Wright48 min
Aug 3, 11:32 AM CDTSevere Thunderstorm WarningMPXChisago, Isanti, Mille Lacs, Sherburne43 min
Aug 3, 1:17 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Morrison, Sherburne, Stearns58 min
Aug 3, 1:22 PM CDTSevere Thunderstorm WarningMPXChisago, Isanti, Kanabec53 min
Aug 3, 1:54 PM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison48 min
Aug 3, 2:25 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Stearns65 min
Aug 3, 3:26 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Sherburne, Stearns39 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.