Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 75, NWS Twin Cities, MN

July 12, 20154 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2015, 8:59 PM CDT for 4 counties in Minnesota. It was in force for 61 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: Jul 12, 2015, 8:59 PM CDT (01:59 UTC)
Expired: Jul 12, 2015, 10:00 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Anoka County, MN, Benton County, MN, Isanti County, MN, Sherburne County, MN

The radar

The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 02:02 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
Jul 12, 5:28 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.0 hours before the alert went out and 68 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: 3598 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1040 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 12.7

Open this sounding in Storm Lab

The text

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

363 
WUUS53 KMPX 130159 RRA
SVRMPX
MNC003-009-059-141-130300-
/O.NEW.KMPX.SV.W.0075.150713T0159Z-150713T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
859 PM CDT SUN JUL 12 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  SOUTHEASTERN BENTON COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 1000 PM CDT

* AT 858 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER PARENT...OR
  11 MILES EAST OF ST. CLOUD...MOVING SOUTHEAST AT 25 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. 

* LOCATIONS IMPACTED INCLUDE...
  ST. CLOUD...CAMBRIDGE...RAMSEY...ELK RIVER...BIG LAKE...ST.
  FRANCIS...ISANTI...ZIMMERMAN...PRINCETON...BECKER...FOLEY AND CLEAR
  LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4556 9375 4555 9312 4524 9350 4530 9355
      4530 9376 4538 9390 4540 9401 4553 9413
      4572 9378
TIME...MOT...LOC 0158Z 301DEG 23KT 4560 9395 

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

DWE

1 follow-up statement

584 
WWUS53 KMPX 130250
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
950 PM CDT SUN JUL 12 2015

MNC009-130300-
/O.CAN.KMPX.SV.W.0075.000000T0000Z-150713T0300Z/
BENTON MN-
950 PM CDT SUN JUL 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BENTON COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4556 9375 4555 9312 4524 9350 4530 9355
      4530 9376 4538 9390 4540 9401 4550 9410
      4552 9383
TIME...MOT...LOC 0250Z 301DEG 23KT 4543 9354 

$$

MNC003-059-141-130300-
/O.CON.KMPX.SV.W.0075.000000T0000Z-150713T0300Z/
ISANTI MN-SHERBURNE MN-ANOKA MN-
950 PM CDT SUN JUL 12 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHERN ISANTI...SHERBURNE AND NORTHWESTERN ANOKA COUNTIES...

AT 950 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ZIMMERMAN...OR
16 MILES SOUTHWEST OF CAMBRIDGE...MOVING SOUTHEAST AT 25 MPH.

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

SOURCE...RADAR INDICATED. 

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

LOCATIONS IMPACTED INCLUDE...
CAMBRIDGE...RAMSEY...ELK RIVER...BIG LAKE...ST. FRANCIS...ISANTI...
ZIMMERMAN...PRINCETON...BECKER...CLEAR LAKE...OAK GROVE AND NOWTHEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4556 9375 4555 9312 4524 9350 4530 9355
      4530 9376 4538 9390 4540 9401 4550 9410
      4552 9383
TIME...MOT...LOC 0250Z 301DEG 23KT 4543 9354 

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

DWE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 7:00 PM CDT	Tornado Warning	MPX	Morrison, Todd	45 min
Jul 12, 7:09 PM CDT	Tornado Warning	MPX	Pope, Stevens	36 min
Jul 12, 7:18 PM CDT	Tornado Warning	MPX	Morrison, Todd	42 min
Jul 12, 7:20 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	70 min
Jul 12, 7:30 PM CDT	Special Weather Statement	MPX	Douglas	3 hr
Jul 12, 7:39 PM CDT	Tornado Warning	MPX	Douglas	30 min
Jul 12, 7:40 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	50 min
Jul 12, 7:42 PM CDT	Tornado Warning	MPX	Pope	48 min
Jul 12, 8:16 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	44 min
Jul 12, 8:24 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Sherburne	51 min
Jul 12, 8:27 PM CDT	Severe Thunderstorm Warning	MPX	Pope	33 min
Jul 12, 8:32 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs	28 min
Jul 12, 8:40 PM CDT	Special Weather Statement	MPX	Douglas	35 min
Jul 12, 8:54 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Kanabec, Mille Lacs	51 min
Jul 12, 8:54 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Stearns, Wright	81 min
Jul 12, 8:59 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns	46 min
Jul 12, 9:03 PM CDT	Special Weather Statement	MPX	Chippewa	27 min
Jul 12, 9:24 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti	51 min
Jul 12, 9:31 PM CDT	Special Weather Statement	MPX	Kandiyohi	29 min
Jul 12, 9:48 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Wright	57 min
Jul 12, 9:48 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti, Ramsey, Washington	57 min
Jul 12, 10:32 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Stearns, Wright	26 min
Jul 12, 10:45 PM CDT	Special Weather Statement	MPX	Carver, Hennepin, McLeod, Ramsey, Washington, Wright	60 min
Jul 12, 10:55 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Wright	35 min
Jul 12, 11:18 PM CDT	Special Weather Statement	MPX	Douglas	57 min
Jul 12, 11:18 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	19 min
Jul 12, 11:40 PM CDT	Special Weather Statement	MPX	Dakota, Goodhue, Le Sueur, Rice, Scott	50 min
Jul 13, 12:29 AM CDT	Special Weather Statement	MPX	Todd	46 min
Jul 13, 12:41 AM CDT	Special Weather Statement	MPX	Goodhue	64 min
Jul 13, 1:23 AM CDT	Special Weather Statement	MPX	Sherburne	52 min
Jul 13, 2:47 AM CDT	Special Weather Statement	MPX	Washington	58 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015 Every severe thunderstorm warning in 2015

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.