Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 55, NWS Twin Cities, MN

June 28, 20146 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 28, 2014, 3:30 PM CDT for 6 counties in Minnesota. It was in force for 16 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: Jun 28, 2014, 3:30 PM CDT (20:30 UTC)
Expired: Jun 28, 2014, 3:46 PM CDT
In force: 16 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Anoka County, MN, Hennepin County, MN, Isanti County, MN, Mille Lacs County, MN, Sherburne County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 74 km from the middle of the area, began a volume at 20:34 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
Jun 28, 2:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 74 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: 666 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

228 
WUUS53 KMPX 282030
SVRMPX
MNC003-053-059-095-141-171-282115-
/O.NEW.KMPX.SV.W.0055.140628T2030Z-140628T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
330 PM CDT SAT JUN 28 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTH CENTRAL HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  WESTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTH CENTRAL MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 415 PM CDT

* AT 328 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 8 MILES EAST OF LAKE MARIA STATE PARK TO 11 MILES
  NORTHWEST OF MAPLE GROVE TO LAKE MINNETONKA...AND MOVING NORTHEAST
  AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ELK RIVER AROUND 340 PM CDT.
  PRINCETON AND ANOKA AROUND 350 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE 
OTSEGO...HAMEL...ROGERS...ZIMMERMAN...DAYTON...NOWTHEN AND RAMSEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4580 9356 4576 9351 4574 9351 4573 9347
      4559 9328 4531 9326 4494 9365 4511 9368
      4534 9394
TIME...MOT...LOC 2030Z 210DEG 42KT 4535 9379 4520 9361
          4501 9360

HAIL...0.75IN
WIND...60MPH

$$

1 follow-up statement

769 
WWUS53 KMPX 282046
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
346 PM CDT SAT JUN 28 2014

MNC003-053-059-095-141-171-282057-
/O.CAN.KMPX.SV.W.0055.000000T0000Z-140628T2115Z/
ANOKA MN-HENNEPIN MN-ISANTI MN-MILLE LACS MN-SHERBURNE MN-WRIGHT MN-
346 PM CDT SAT JUN 28 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WRIGHT...EASTERN
SHERBURNE...SOUTH CENTRAL MILLE LACS...WESTERN ISANTI...NORTH CENTRAL
HENNEPIN AND NORTHWESTERN ANOKA COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER...GUSTY WINDS ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 4580 9356 4576 9351 4574 9351 4573 9347
      4559 9328 4531 9326 4494 9365 4511 9368
      4534 9394
TIME...MOT...LOC 2047Z 210DEG 42KT 4552 9365 4537 9347
          4518 9346

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 1:40 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Sibley	35 min
Jun 28, 3:05 PM CDT	Special Weather Statement	MPX	Carver, Hennepin	40 min
Jun 28, 3:41 PM CDT	Special Weather Statement	MPX	Anoka	34 min
Jun 28, 4:10 PM CDT	Special Weather Statement	MPX	Chisago	50 min
Jun 28, 4:17 PM CDT	Special Weather Statement	MPX	Chisago	43 min
Jun 28, 4:21 PM CDT	Special Weather Statement	MPX	Anoka	24 min
Jun 28, 5:02 PM CDT	Special Weather Statement	MPX	Freeborn	43 min
Jun 28, 5:06 PM CDT	Special Weather Statement	MPX	Anoka, Ramsey	39 min
Jun 28, 5:32 PM CDT	Special Weather Statement	MPX	Ramsey	58 min
Jun 28, 5:40 PM CDT	Areal Flood Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	6 hr
Jun 28, 6:18 PM CDT	Special Weather Statement	MPX	Chisago, Washington	117 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014 Every severe thunderstorm warning in 2014

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.