Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 16, NWS Twin Cities, MN

May 10, 2011Benton County, Mille Lacs County, Sherburne County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 10, 2011, 7:06 PM CDT for Benton County, Mille Lacs County, Sherburne County, Minnesota. It was in force for 39 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: May 10, 2011, 7:06 PM CDT (00:06 UTC)
Expired: May 10, 2011, 7:45 PM CDT
In force: 39 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

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

The radar

The Minneapolis radar (KMPX), 82 km from the middle of the area, began a volume at 00:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 10, 5:53 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 81 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: 4330 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 3.0
Supercell composite: 33.9

Open this sounding in Storm Lab

The text

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

856 
WUUS53 KMPX 110006
SVRMPX
MNC009-095-141-110045-
/O.NEW.KMPX.SV.W.0016.110511T0006Z-110511T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
706 PM CDT TUE MAY 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BENTON COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN SHERBURNE COUNTY IN CENTRAL MINNESOTA...

* UNTIL 745 PM CDT

* AT 701 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM WAS LOCATED NEAR CLEAR
  LAKE...OR ABOUT 12 MILES SOUTHEAST OF ST CLOUD...AND MOVING
  NORTHEAST AT 55 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  PRINCETON...
  MILACA...
  SANTIAGO...
  GLENDORADO...
  RONNEBY...
  PEASE...
  FORESTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY
MORNING FOR EAST CENTRAL MINNESOTA.

&&

LAT...LON 4556 9352 4537 9390 4544 9407 4545 9408
      4581 9377 4582 9351
TIME...MOT...LOC 0005Z 219DEG 47KT 4546 9396
WIND...HAIL <50MPH 1.25IN

$$

1 follow-up statement

987 
WWUS53 KMPX 110035
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
735 PM CDT TUE MAY 10 2011

MNC141-110045-
/O.CAN.KMPX.SV.W.0016.000000T0000Z-110511T0045Z/
SHERBURNE MN-
735 PM CDT TUE MAY 10 2011

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

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

LAT...LON 4582 9351 4556 9372 4556 9399 4581 9377
TIME...MOT...LOC 0035Z 252DEG 20KT 4567 9390

$$

MNC009-095-110045-
/O.CON.KMPX.SV.W.0016.000000T0000Z-110511T0045Z/
MILLE LACS MN-BENTON MN-
735 PM CDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN BENTON
AND SOUTHERN MILLE LACS COUNTIES UNTIL 745 PM CDT...

AT 733 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR 
FOLEY...OR 14 MILES SOUTHWEST OF MILACA...MOVING EAST NORTHEAST AT 
25 MPH.

LOCATIONS IMPACTED INCLUDE...
  MILACA...RONNEBY...FORESTON...GLENDORADO...PEASE AND BOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

&&

LAT...LON 4582 9351 4556 9372 4556 9399 4581 9377
TIME...MOT...LOC 0035Z 252DEG 20KT 4567 9390
WIND...HAIL 60MPH 1.25IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:00 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele	60 min
May 10, 7:21 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	54 min
May 10, 7:24 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Hennepin, Scott	66 min
May 10, 7:43 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Isanti, Mille Lacs, Sherburne, Wright	62 min
May 10, 7:46 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	59 min
May 10, 7:47 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs	58 min
May 10, 7:54 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice, Scott	53 min
May 10, 7:55 PM CDT	Tornado Warning	MPX	Anoka, Hennepin, Sherburne, Wright	35 min
May 10, 8:10 PM CDT	Tornado Warning	MPX	Hennepin	35 min
May 10, 8:27 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Kanabec, Mille Lacs	63 min
May 10, 8:44 PM CDT	Tornado Warning	MPX	Anoka, Isanti, Sherburne	35 min
May 10, 8:51 PM CDT	Tornado Warning	MPX	Isanti, Kanabec, Mille Lacs	39 min
May 10, 9:19 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	41 min
May 10, 9:29 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Kanabec, Mille Lacs	46 min
May 10, 9:31 PM CDT	Areal Flood Advisory	MPX	Isanti, Kanabec, Mille Lacs	3 hr
May 10, 10:00 PM CDT	Severe Thunderstorm Warning	MPX	Isanti	43 min
May 10, 10:03 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	36 min
May 10, 10:19 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	56 min
May 10, 10:43 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.