Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 99, NWS Twin Cities, MN

July 1, 20119 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 1, 2011, 5:52 PM CDT for 9 counties in Minnesota. It was in force for 53 min. 24 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 1, 2011, 5:52 PM CDT (22:52 UTC)
Expired: Jul 1, 2011, 6:45 PM CDT
In force: 53 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 75.0 mph

Counties Anoka County, MN, Benton County, MN, Hennepin County, MN, Isanti County, MN, Meeker County, MN, Mille Lacs County, MN, Sherburne County, MN, Stearns County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 65 km from the middle of the area, began a volume at 22:54 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 1, 5:56 PM CDT	TSTM WND DMG	1 Se Monticello, MN	UTILITY POWER LOST.
Jul 1, 5:56 PM CDT	HAIL 2	Big Lake, MN	COUNTY ROAD 81 AND HIGHWAY 10
Jul 1, 5:58 PM CDT	HAIL 1.75	2 Nne Big Lake, MN
Jul 1, 6:00 PM CDT	TSTM WND DMG	Kingston, MN	ESTIMATED 70 MPH WIND GUSTS TOOK OUT SEVERAL LARGE TREE LIMBS AND UPROOTED A TREE.
Jul 1, 6:00 PM CDT	HAIL 1.25	4 Ene Becker, MN
Jul 1, 6:01 PM CDT	TSTM WND GST 70	1 S Big Lake, MN
Jul 1, 6:02 PM CDT	HAIL 2.75	5 N Big Lake, MN
Jul 1, 6:06 PM CDT	HAIL 1	1 N South Haven, MN
Jul 1, 6:08 PM CDT	HAIL 1	St Augusta, MN
Jul 1, 6:10 PM CDT	TSTM WND DMG	St Cloud, MN	NUMEROUS TREES DOWN JUST NORTH OF DOWNTOWN BY HOSPITAL. TIME ESTIMATED.
Jul 1, 6:13 PM CDT	TSTM WND GST 52	Monticello, MN	CTY 18 AND I 94
Jul 1, 6:14 PM CDT	TSTM WND GST 68	Buffalo, MN	MEASURED AT BUFFALO AIRPORT
Jul 1, 6:15 PM CDT	TSTM WND GST 70	4 W Big Lake, MN
Jul 1, 6:15 PM CDT	TSTM WND GST 71	1 S Big Lake, MN
Jul 1, 6:22 PM CDT	TSTM WND GST 62	Princeton, MN	MEASURED AT PRINCETON AIRPORT
Jul 1, 6:23 PM CDT	HAIL 1	1 Sw Zimmerman, MN
Jul 1, 6:25 PM CDT	TSTM WND DMG	Annandale, MN	MULTIPLE REPORTS OF DOWNED TREES BLOCKING ROADS. POWER LINES DOWN OVER ROADS.
Jul 1, 6:29 PM CDT	TSTM WND DMG	Foreston, MN	ROOF BLOWN OFF. JUNCTION OF 155TH AND 165TH AVE.ESTIMATED 3 MILES FROM BENTON COUNTY BORDER.
Jul 1, 6:30 PM CDT	TSTM WND DMG	Coon Rapids, MN	18 TO 24 INCH TREES UPROOTED NEAR NORTHDALE AND FOLEY. TREE FELL ON TRUCK.
Jul 1, 6:32 PM CDT	TSTM WND GST 68	Maple Lake, MN
Jul 1, 6:45 PM CDT	TSTM WND GST 73	1 Ssw Buffalo, MN	6 INCH TO 8 INCH BRANCHES DOWN
Jul 1, 6:52 PM CDT	TSTM WND DMG	Buffalo, MN	12 INCH PINE TREE DOWN BY HWY 55 AND HWY 25
Jul 1, 6:53 PM CDT	TSTM WND DMG	Buffalo, MN	TOP OF LARGE TREES BEING SNAPPED
Jul 1, 6:55 PM CDT	TSTM WND GST 56	Monticello, 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.

Issued	Product	Office	Lasted
Jul 1, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.9 hours before the alert went out and 64 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: 3970 J/kg
Mixed-layer CIN: -245 J/kg
Mixed-layer LCL: 1089 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

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

013 
WUUS53 KMPX 012252
SVRMPX
MNC003-009-053-059-093-095-141-145-171-012345-
/O.NEW.KMPX.SV.W.0099.110701T2252Z-110701T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
552 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN BENTON COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  WESTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN MEEKER COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 645 PM CDT

* AT 550 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN
  EXCESS OF 75 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM ST NICHOLAS TO ANNANDALE TO LESTER PRAIRIE...AND MOVING
  NORTHEAST AT 60 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  BUFFALO...
  ST CLOUD...
  PRINCETON...
  MILACA...
  SOUTH HAVEN...
  ST NICHOLAS...
  KIMBALL...
  WATKINS...
  COKATO...
  EDEN VALLEY...
  MANANNAH...
  DASSEL...
  ANNANDALE...
  HOWARD LAKE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. 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.

&&

LAT...LON 4586 9353 4574 9351 4572 9332 4520 9321
      4497 9380 4498 9427 4509 9437 4527 9477
TIME...MOT...LOC 2252Z 227DEG 51KT 4541 9449 4525 9412
          4491 9405
WIND...HAIL 75MPH 1.00IN

$$

JLT

2 follow-up statements

952 
WWUS53 KMPX 012304
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
604 PM CDT FRI JUL 1 2011

MNC003-009-053-059-093-095-141-145-171-012345-
/O.CON.KMPX.SV.W.0099.000000T0000Z-110701T2345Z/
ANOKA MN-BENTON MN-HENNEPIN MN-ISANTI MN-MEEKER MN-MILLE LACS MN-
SHERBURNE MN-STEARNS MN-WRIGHT MN-
604 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WRIGHT...
SOUTHEASTERN STEARNS...SHERBURNE...SOUTHERN MILLE LACS...NORTHERN
MEEKER...WESTERN ISANTI...NORTHWESTERN HENNEPIN...SOUTHEASTERN BENTON
AND WESTERN ANOKA COUNTIES UNTIL 645 PM CDT...

AT 559 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
THUNDERSTORMS PRODUCING LARGE DESTRUCTIVE HAIL UP TO BASEBALL SIZE...
AND DESTRUCTIVE WINDS IN EXCESS OF 75 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM COLD SPRING TO HASTY TO 5 MILES WEST OF
WATERTOWN...MOVING NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  BUFFALO...ST CLOUD...PRINCETON...MILACA...CLEAR LAKE...BECKER...
  DELANO...INDEPENDENCE...MONTICELLO...ROCKFORD...LORETTO...BIG
  LAKE...SANTIAGO...HAMEL AND ST MICHAEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A VERY DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS AND HAIL...WHICH
WILL UPROOT TREES...DOWN POWER LINES...AND PRODUCE WIDESPREAD DAMAGE
TO BUILDINGS AND VEHICLES. EVACUATE MOBILE HOMES AS THEY MAY BE 
OVERTURNED. 

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

&&

LAT...LON 4586 9353 4574 9351 4572 9332 4520 9321
      4497 9380 4498 9427 4509 9437 4527 9477
TIME...MOT...LOC 2304Z 227DEG 51KT 4553 9431 4536 9394
          4502 9387
WIND...HAIL 75MPH 2.75IN

$$

JLT

899 
WWUS53 KMPX 012335
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
635 PM CDT FRI JUL 1 2011

MNC003-009-053-059-093-095-141-145-171-012345-
/O.CON.KMPX.SV.W.0099.000000T0000Z-110701T2345Z/
ANOKA MN-BENTON MN-HENNEPIN MN-ISANTI MN-MEEKER MN-MILLE LACS MN-
SHERBURNE MN-STEARNS MN-WRIGHT MN-
635 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WRIGHT...
SOUTHEASTERN STEARNS...SHERBURNE...SOUTHERN MILLE LACS...NORTHERN
MEEKER...WESTERN ISANTI...NORTHWESTERN HENNEPIN...SOUTHEASTERN BENTON
AND WESTERN ANOKA COUNTIES UNTIL 645 PM CDT...

AT 631 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
THUNDERSTORMS PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE WINDS IN
EXCESS OF 75 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM MORRILL TO PRINCETON TO RAMSEY...MOVING NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  MILACA...ANDOVER...DALBO...ST FRANCIS...CEDAR...BOCK AND BETHEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF 
THIS STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN 
UPROOT TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND 
WINDOWS. EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL 
IS ALSO EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. 
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS 
PORTIONS OF MEEKER...WRIGHT AND SHERBURNE COUNTIES. SEEK SHELTER NOW 
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4586 9353 4574 9351 4572 9332 4520 9321
      4497 9380 4498 9427 4509 9437 4527 9477
TIME...MOT...LOC 2334Z 227DEG 51KT 4582 9386 4565 9349
          4531 9343
WIND...HAIL 75MPH 1.00IN

$$

JLT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 4:05 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood, Renville, Yellow Medicine	55 min
Jul 1, 4:31 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	59 min
Jul 1, 4:37 PM CDT	Tornado Warning	MPX	Redwood, Renville	23 min
Jul 1, 4:53 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Redwood, Renville, Sibley	67 min
Jul 1, 4:57 PM CDT	Tornado Warning	MPX	Redwood, Renville	33 min
Jul 1, 4:59 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	61 min
Jul 1, 5:13 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, McLeod, Meeker, Renville, Sibley, Stearns and 1 more	62 min
Jul 1, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti, Sherburne, Wright	48 min
Jul 1, 5:38 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Kanabec, Mille Lacs, Morrison	67 min
Jul 1, 6:02 PM CDT	Special Weather Statement	MPX	Carver, Hennepin, Scott	43 min
Jul 1, 6:16 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	29 min
Jul 1, 6:20 PM CDT	Tornado Warning	MPX	Benton, Sherburne, Stearns	25 min
Jul 1, 6:27 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti, Kanabec, Mille Lacs	63 min
Jul 1, 6:42 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Benton, Chisago, Hennepin, Isanti, Kanabec and 5 more	63 min
Jul 1, 6:42 PM CDT	Severe Thunderstorm Warning	MPX	Martin	33 min
Jul 1, 6:56 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every severe thunderstorm warning in 2011

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.