Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 231, NWS Twin Cities, MN

July 8, 2007Anoka County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 8, 2007, 3:44 PM CDT for Anoka County, Minnesota. It was in force for 61 min. 3 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: Jul 8, 2007, 3:44 PM CDT (20:44 UTC)
Expired: Jul 8, 2007, 4:45 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Anoka County, MN

The radar

The Minneapolis radar (KMPX), 58 km from the middle of the area, began a volume at 20:45 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
Jul 8, 4:06 PM CDT	HAIL 1.75	Ramsey, MN	STARTED AS NICKEL HAIL AT 358PM.
Jul 8, 4:07 PM CDT	HAIL 1.75	Andover, MN
Jul 8, 4:10 PM CDT	HAIL 2.75	Andover, MN	GOLFBALL TO BASEBALL SIZED HAIL DAMAGED A CAR ON 161ST AVE. THE TIME WAS ESTIMATED.

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
Jul 8, 1:28 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.7 hours before the alert went out and 59 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: 432 J/kg
Mixed-layer CIN: -564 J/kg
Mixed-layer LCL: 2355 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 107 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 082044
SVRMPX
MNC003-082145-
/O.NEW.KMPX.SV.W.0231.070708T2044Z-070708T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
344 PM CDT SUN JUL 8 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 445 PM CDT

* AT 341 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED 14
  MILES NORTHWEST OF ANDOVER...OR ABOUT 13 MILES SOUTH OF
  PRINCETON...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ANDOVER...
  EAST BETHEL...

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.

STAY INDOORS...AND AWAY FROM WINDOWS.

LAT...LON 4541 9349 4526 9351 4523 9304 4540 9303

$$

3 follow-up statements

000 
WWUS53 KMPX 082055
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
355 PM CDT SUN JUL 8 2007

MNC003-082145-
/O.CON.KMPX.SV.W.0231.000000T0000Z-070708T2145Z/
ANOKA MN-
355 PM CDT SUN JUL 8 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR ANOKA COUNTY...

AT 346 PM CDT...ONE AND ONE-QUARTER INCH HAIL WAS REPORTED IN ELK 
RIVER WITH THIS STORM. BRANCHES WERE ALSO REPORTED TO BE DOWN.

AT 353 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 3 MILES WEST OF
CEDAR...OR ABOUT OVER ANDOVER...AND MOVING SOUTHEAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SPRING LAKE PARK...OAK PARK...
LEXINGTON...CEDAR...ST FRANCIS...LINO LAKES...HAM LAKE...FRIDLEY...
EAST BETHEL AND COON RAPIDS.

LAT...LON 4513 9321 4511 9323 4504 9323 4504 9326
      4514 9328 4525 9350 4541 9350 4541 9304
      4538 9302 4514 9302

$$

000 
WWUS53 KMPX 082111
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
409 PM CDT SUN JUL 8 2007

MNC003-082145-
/O.CON.KMPX.SV.W.0231.000000T0000Z-070708T2145Z/
ANOKA MN-
409 PM CDT SUN JUL 8 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR ANOKA COUNTY...

AT 406 PM CDT...GOLF BALL SIZE HAIL WAS REPORTED IN ANDOVER AND IN 
RAMSEY AT 407 PM CDT WITH THIS STORM. 

AT 406 PM CDT...THIS STORM WAS LOCATED 3 MILES SOUTHEAST OF 
CEDAR...OR ABOUT OVER ANDOVER...AND MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SPRING LAKE PARK...OAK PARK...
LEXINGTON...CEDAR...ST FRANCIS...LINO LAKES...HAM LAKE...EAST
BETHEL...COON RAPIDS AND COLUMBIA HEIGHTS.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS

LAT...LON 4513 9321 4511 9323 4504 9323 4504 9326
      4514 9328 4525 9350 4541 9350 4541 9304
      4538 9302 4514 9302

$$

JPR

000 
WWUS53 KMPX 082136
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
436 PM CDT SUN JUL 8 2007

MNC003-082146-
/O.EXP.KMPX.SV.W.0231.000000T0000Z-070708T2145Z/
ANOKA MN-
436 PM CDT SUN JUL 8 2007

...THE SEVERE THUNDERSTORM WARNING FOR ANOKA COUNTY EXPIRES AT 445 PM
CDT...

SEVERE STORMS WERE ABOUT TO MOVE OUT OF THE COUNTY. HOWEVER...MORE 
THUNDERSTORMS WERE DEVELOPING IN THE ELK RIVER AREA AND MOVING 
EAST...REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS.

LAT...LON 4513 9321 4511 9323 4504 9323 4504 9326
      4514 9328 4525 9350 4541 9350 4541 9304
      4538 9302 4514 9302

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 12:57 PM CDT	Severe Thunderstorm Warning	MPX	Wright	63 min
Jul 8, 1:09 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne	51 min
Jul 8, 1:32 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	58 min
Jul 8, 2:03 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne	27 min
Jul 8, 2:12 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	63 min
Jul 8, 2:29 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Washington	46 min
Jul 8, 2:48 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	57 min
Jul 8, 3:01 PM CDT	Severe Thunderstorm Warning	MPX	Carver, McLeod	59 min
Jul 8, 3:31 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne	26 min
Jul 8, 3:47 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	58 min
Jul 8, 6:14 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet	29 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.