Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 133, NWS Twin Cities, MN

July 10, 20115 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 10, 2011, 9:37 PM CDT for 5 counties in Minnesota. It was in force for 53 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 10, 2011, 9:37 PM CDT (02:37 UTC)
Expired: Jul 10, 2011, 10:30 PM CDT
In force: 53 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Anoka County, MN, Carver County, MN, Hennepin County, MN, Sherburne County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 45 km from the middle of the area, began a volume at 02:38 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 10, 9:50 PM CDT	TSTM WND DMG	2 Sw Ramsey, MN	30 FOOT PINE TREE SNAPPED OFF SUNDAY EVENING
Jul 10, 9:50 PM CDT	TSTM WND GST 55	Monticello, MN	I-94 AND COUNTY ROAD 18.
Jul 10, 10:00 PM CDT	TSTM WND DMG	Dayton, MN	LARGE TREE DOWN.

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 10, 6:12 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.6 hours before the alert went out and 45 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: 1401 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1316 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 15 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.

392 
WUUS53 KMPX 110237
SVRMPX
MNC003-019-053-141-171-110330-
/O.NEW.KMPX.SV.W.0133.110711T0237Z-110711T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
937 PM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  EASTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1030 PM CDT

* AT 933 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM SANTIAGO TO
  WINSTED...AND MOVING EAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  BUFFALO...
  PLYMOUTH...
  MONTICELLO...
  MONTROSE...
  BIG LAKE...
  ZIMMERMAN...
  WATERTOWN...
  DELANO...
  ALBERTVILLE...
  ROCKFORD...
  ST MICHAEL...
  OTSEGO...
  ELK RIVER...
  HANOVER...

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 WINDOWS. EVACUATE
MOBILE HOMES AS THEY MAY BE OVERTURNED. 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.

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

&&

LAT...LON 4543 9351 4542 9351 4542 9348 4530 9315
      4488 9338 4490 9376 4498 9398 4556 9378
TIME...MOT...LOC 0236Z 289DEG 39KT 4548 9379 4496 9409
WIND...HAIL 70MPH <.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:13 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Stevens, Swift	62 min
Jul 10, 7:25 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Pope, Renville, Swift and 1 more	50 min
Jul 10, 7:36 PM CDT	Tornado Warning	MPX	Kandiyohi, Pope, Stearns	39 min
Jul 10, 7:40 PM CDT	Tornado Warning	MPX	Lac qui Parle	35 min
Jul 10, 7:42 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	63 min
Jul 10, 7:48 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	57 min
Jul 10, 7:57 PM CDT	Tornado Warning	MPX	Swift	33 min
Jul 10, 8:04 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Lac qui Parle, Renville, Yellow Medicine	56 min
Jul 10, 8:11 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	64 min
Jul 10, 8:24 PM CDT	Areal Flood Advisory	MPX	Benton, Douglas, Kandiyohi, Morrison, Pope, Sherburne and 3 more	3 hr
Jul 10, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	46 min
Jul 10, 8:36 PM CDT	Tornado Warning	MPX	Kandiyohi, Meeker	24 min
Jul 10, 8:40 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Redwood, Renville, Yellow Medicine	65 min
Jul 10, 8:45 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	30 min
Jul 10, 8:52 PM CDT	Tornado Warning	MPX	Chippewa, Renville	38 min
Jul 10, 9:06 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Sherburne, Stearns, Wright	54 min
Jul 10, 9:20 PM CDT	Severe Thunderstorm Warning	MPX	Brown, McLeod, Nicollet, Redwood, Renville, Sibley	55 min
Jul 10, 9:30 PM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Freeborn, Le Sueur, Martin, Rice and 3 more	75 min
Jul 10, 9:33 PM CDT	Special Weather Statement	MPX	Benton	42 min
Jul 10, 9:46 PM CDT	Special Weather Statement	MPX	Dakota, Ramsey, Scott, Washington	74 min
Jul 10, 10:09 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Le Sueur, McLeod, Nicollet, Scott and 2 more	66 min
Jul 10, 10:10 PM CDT	Tornado Warning	MPX	McLeod, Sibley	23 min
Jul 10, 10:17 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	58 min
Jul 10, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Carver, Le Sueur, Rice, Scott, Steele and 1 more	57 min
Jul 10, 11:02 PM CDT	Special Weather Statement	MPX	Faribault, Freeborn, Martin	58 min
Jul 10, 11:13 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice, Steele	47 min
Jul 10, 11:39 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	51 min
Jul 11, 1:34 AM CDT	Special Weather Statement	MPX	Faribault, Martin	56 min
Jul 11, 2:11 AM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	64 min
Jul 11, 3:20 AM CDT	Areal Flood Advisory	MPX	Martin	3 hr

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.