Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 125, NWS Twin Cities, MN

September 4, 2014Mille Lacs County, Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 4, 2014, 6:50 AM CDT for Mille Lacs County, Morrison County, Minnesota. It was in force for 55 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: Sep 4, 2014, 6:50 AM CDT (11:50 UTC)
Expired: Sep 4, 2014, 7:45 AM CDT
In force: 55 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 80.0 mph

Counties Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 151 km from the middle of the area, began a volume at 11:52 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
Sep 4, 5:02 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 11.8 hours before the alert went out and 150 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: 2049 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 14.3

Open this sounding in Storm Lab

The text

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

256 
WUUS53 KMPX 041150
SVRMPX
MNC095-097-041245-
/O.NEW.KMPX.SV.W.0125.140904T1150Z-140904T1245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
650 AM CDT THU SEP 4 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN MORRISON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 745 AM CDT

* AT 648 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES
  SOUTHWEST OF BRAINERD...AND MOVING EAST AT 65 MPH.

  THIS IS A VERY DANGEROUS STORM.

  HAZARD...80 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE HEAVILY DAMAGED. EXPECT
           CONSIDERABLE DAMAGE TO ROOFS...WINDOWS AND VEHICLES.
           EXTENSIVE TREE DAMAGE AND POWER OUTAGES ARE LIKELY.

* LOCATIONS IMPACTED INCLUDE...
  LAKE MILLE LACS...CAMP RIPLEY...MILLE LACS KATHIO STATE PARK...
  ONAMIA...HARDING...GENOLA...PIERZ...LASTRUP...HILLMAN...VINELAND...
  BAYVIEW...WAHKON...RUM RIVER STATE FOREST AND ISLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. THIS STORM IS PRODUCING WIDESPREAD 
WIND DAMAGE ACROSS NORTHERN TODD COUNTY. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

IF ON OR NEAR LAKE MILLE LACS...GET AWAY FROM THE WATER AND MOVE TO 
SHELTER. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK 
BY LIGHTNING. BOATS CAN BE SWAMPED BY LARGE CAPSIZING WAVES...EVEN 
ON SMALL BODIES OF WATER. MOVE INTO DOCK AND SEEK SAFE SHELTER NOW.

&&

LAT...LON 4629 9433 4627 9433 4623 9438 4616 9436
      4616 9383 4625 9380 4625 9349 4624 9342
      4598 9344 4598 9352 4580 9352 4611 9464
      4612 9464 4633 9441
TIME...MOT...LOC 1150Z 287DEG 59KT 4627 9433

HAIL...1.00IN
WIND...80MPH

$$

BORGHOFF

3 follow-up statements

123 
WWUS53 KMPX 041207
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
707 AM CDT THU SEP 4 2014

MNC095-097-041245-
/O.CON.KMPX.SV.W.0125.000000T0000Z-140904T1245Z/
MILLE LACS MN-MORRISON MN-
707 AM CDT THU SEP 4 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
MORRISON AND NORTHERN MILLE LACS COUNTIES UNTIL 745 AM CDT...

AT 705 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 7 MILES EAST OF BRAINERD TO 9 MILES SOUTHWEST OF
GARRISON TO 6 MILES EAST OF CAMP RIPLEY...AND MOVING EAST AT 60 MPH.

THESE ARE VERY DANGEROUS STORMS.

HAZARD...80 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE HEAVILY DAMAGED. EXPECT
         CONSIDERABLE DAMAGE TO ROOFS...WINDOWS AND VEHICLES.
         EXTENSIVE TREE DAMAGE AND POWER OUTAGES ARE LIKELY.

SEVERE THUNDERSTORMS WILL BE NEAR...
  MILLE LACS KATHIO STATE PARK AROUND 720 AM CDT.
  LAKE MILLE LACS AROUND 725 AM CDT.
  ONAMIA AROUND 730 AM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE GENOLA...PIERZ...LASTRUP...
VINELAND...HILLMAN...BAYVIEW...WAHKON...ISLE AND RUM RIVER STATE
FOREST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS SITUATION. THESE STORMS ARE LIKELY 
PRODUCING WIDESPREAD WIND DAMAGE. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS.

IF ON LAKE MILLE LACS...GET AWAY FROM THE WATER AND MOVE TO SHELTER. 
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY 
LIGHTNING. BOATS CAN BE SWAMPED BY LARGE CAPSIZING WAVES...EVEN ON 
SMALL BODIES OF WATER. MOVE INTO DOCK AND SEEK SAFE SHELTER NOW.

&&

LAT...LON 4580 9352 4608 9453 4623 9438 4616 9436
      4616 9383 4625 9380 4625 9349 4624 9342
      4598 9344 4598 9352
TIME...MOT...LOC 1206Z 281DEG 54KT 4636 9403 4625 9397
          4608 9422

HAIL...1.00IN
WIND...80MPH

$$

BORGHOFF

191 
WWUS53 KMPX 041226
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
726 AM CDT THU SEP 4 2014

MNC095-097-041245-
/O.CON.KMPX.SV.W.0125.000000T0000Z-140904T1245Z/
MILLE LACS MN-MORRISON MN-
726 AM CDT THU SEP 4 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
MORRISON AND NORTHERN MILLE LACS COUNTIES UNTIL 745 AM CDT...

AT 723 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 8 MILES EAST OF GARRISON TO LAKE MILLE LACS TO
ONAMIA...AND MOVING EAST AT 65 MPH.

HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE
         TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
         ROOFS AND OUTBUILDINGS.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF EAST CENTRAL
MORRISON AND NORTHERN MILLE LACS COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. THESE STORMS ARE LIKELY PRODUCING 
WIDESPREAD WIND DAMAGE ACROSS NORTHERN MILLE LACS COUNTY. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4588 9353 4601 9401 4615 9398 4616 9383
      4625 9380 4625 9349 4624 9342 4598 9344
      4598 9352
TIME...MOT...LOC 1226Z 281DEG 55KT 4630 9360 4619 9354
          4602 9366

HAIL...1.00IN
WIND...70MPH

$$

BORGHOFF

067 
WWUS53 KMPX 041241
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
741 AM CDT THU SEP 4 2014

MNC095-097-041252-
/O.EXP.KMPX.SV.W.0125.000000T0000Z-140904T1245Z/
MILLE LACS MN-MORRISON MN-
741 AM CDT THU SEP 4 2014

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MORRISON AND
NORTHERN MILLE LACS COUNTIES WILL EXPIRE AT 745 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.

LAT...LON 4588 9353 4601 9401 4615 9398 4616 9383
      4625 9380 4625 9349 4624 9342 4598 9344
      4598 9352
TIME...MOT...LOC 1242Z 281DEG 55KT 4623 9326 4612 9320
          4595 9333

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 7:22 PM CDT	Special Weather Statement	MPX	Chisago, Isanti	53 min
Sep 3, 7:44 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti	46 min
Sep 4, 5:14 AM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	35 min
Sep 4, 6:05 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Morrison, Todd	55 min
Sep 4, 7:21 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	39 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.