Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 147, NWS Twin Cities, MN

July 7, 20085 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 7, 2008, 6:38 PM CDT for 5 counties in Minnesota. It was in force for 48 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
Jul 7, 2008, 6:38 PM CDT (23:38 UTC)
Expired
Jul 7, 2008, 7:26 PM CDT
In force
48 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Anoka County, MN, Benton County, MN, Isanti County, MN, Mille Lacs County, MN, Sherburne County, MN

The radar

The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 23:41 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, 11.6 hours before the alert went out and 78 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 2008-07-07Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2008-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1467 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
21 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 072338
SVRMPX
MNC003-009-059-095-141-080030-
/O.NEW.KMPX.SV.W.0147.080707T2338Z-080708T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
638 PM CDT MON JUL 7 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  WESTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN BENTON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 730 PM CDT

* AT 636 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 4 MILES EAST OF
  FORESTON TO 11 MILES SOUTH OF SANTIAGO...AND MOVING EAST AT 43 MPH.

* SOME LOCATIONS INCLUDE...
  PRINCETON...
  ZIMMERMAN...
  DALBO...
  ELK RIVER...
  ST FRANCIS...
  STANCHFIELD...
  CAMBRIDGE...
  GRANDY...
  ISANTI...
  ANDOVER...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS. 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 4569 9316 4523 9332 4539 9389 4574 9373
TIME...MOT...LOC 2338Z 279DEG 38KT 4574 9359 4538 9379

$$
2 follow-up statements
000 
WWUS53 KMPX 080007
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
706 PM CDT MON JUL 7 2008

MNC009-095-080016-
/O.CAN.KMPX.SV.W.0147.000000T0000Z-080708T0030Z/
MILLE LACS MN-BENTON MN-
706 PM CDT MON JUL 7 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BENTON AND
SOUTHERN MILLE LACS COUNTIES 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 4555 9320 4550 9324 4544 9324 4539 9327
      4525 9331 4523 9333 4531 9355 4570 9330
      4567 9316
TIME...MOT...LOC 0006Z 288DEG 34KT 4565 9323 4529 9344

$$

MNC003-059-141-080030-
/O.CON.KMPX.SV.W.0147.000000T0000Z-080708T0030Z/
ISANTI MN-SHERBURNE MN-ANOKA MN-
706 PM CDT MON JUL 7 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHWESTERN ANOKA...EXTREME SOUTHEASTERN SHERBURNE AND CENTRAL
ISANTI COUNTIES...

AT 704 PM CDT...RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH.  THESE SEVERE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 4
MILES NORTHWEST OF GRANDY TO 7 MILES NORTHWEST OF ANDOVER...AND
MOVING EAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE STANCHFIELD...GRANDY...
CEDAR...ATHENS...ST FRANCIS...ISANTI...CAMBRIDGE...BETHEL AND
ANDOVER.

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

LAT...LON 4555 9320 4550 9324 4544 9324 4539 9327
      4525 9331 4523 9333 4531 9355 4570 9330
      4567 9316
TIME...MOT...LOC 0006Z 288DEG 34KT 4565 9323 4529 9344

$$
000 
WWUS53 KMPX 080026
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
726 PM CDT MON JUL 7 2008

MNC003-059-141-080036-
/O.CAN.KMPX.SV.W.0147.000000T0000Z-080708T0030Z/
ISANTI MN-SHERBURNE MN-ANOKA MN-
726 PM CDT MON JUL 7 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ANOKA...EXTREME
SOUTHEASTERN SHERBURNE AND CENTRAL ISANTI COUNTIES IS CANCELLED...

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

LAT...LON 4555 9320 4550 9324 4544 9324 4539 9327
      4525 9331 4523 9333 4531 9355 4570 9330
      4567 9316
TIME...MOT...LOC 0026Z 297DEG 29KT 4562 9299 4526 9320

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 1:41 PM CDTSevere Thunderstorm WarningMPXFreeborn34 min
Jul 7, 5:09 PM CDTSevere Thunderstorm WarningMPXStearns, Todd36 min
Jul 7, 5:52 PM CDTSevere Thunderstorm WarningMPXBenton, Sherburne, Stearns38 min
Jul 7, 6:15 PM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison27 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.