Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 78, NWS Twin Cities, MN

July 12, 20154 counties in Minnesota; Polk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2015, 9:48 PM CDT for 4 counties in Minnesota; Polk County, Wisconsin. It was in force for 57 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, 9:48 PM CDT (02:48 UTC)
Expired: Jul 12, 2015, 10:45 PM CDT
In force: 57 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Anoka County, MN, Isanti County, MN, Ramsey County, MN, Washington County, MN, Polk County, WI

The radar

The Minneapolis radar (KMPX), 54 km from the middle of the area, began a volume at 02:49 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, 2.8 hours before the alert went out and 56 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.

087 
WUUS53 KMPX 130248 RRA
SVRMPX
MNC003-059-123-163-WIC095-130345-
/O.NEW.KMPX.SV.W.0078.150713T0248Z-150713T0345Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTH CENTRAL ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHWESTERN POLK COUNTY IN NORTHWESTERN WISCONSIN...

* UNTIL 1045 PM CDT

* AT 948 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER BETHEL...OR
  11 MILES SOUTH OF CAMBRIDGE...MOVING EAST AT 25 MPH.

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

  SOURCE...RADAR INDICATED. 

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

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  HAM LAKE AROUND 955 PM CDT.
  EAST BETHEL AROUND 1000 PM CDT.
  FOREST LAKE AROUND 1020 PM CDT.
  SCANDIA AROUND 1045 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE FORT
SNELLING...OTISVILLE...NORTH ST. PAUL...BETHEL...BIRCHWOOD...GRANT...
NOWTHEN...FALCON HEIGHTS...WILLIAM OBRIEN STATE PARK AND BIRCHWOOD
VILLAGE.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 35 BETWEEN MILE MARKERS 128 AND 132.
 INTERSTATE 94 IN MINNESOTA NEAR MILE MARKER 225...AND BETWEEN MILE
MARKERS 238 AND 257.

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 AND NORTHWESTERN WISCONSIN.

LAT...LON 4541 9328 4542 9302 4529 9302 4530 9263
      4521 9270 4520 9277 4514 9275 4507 9280
      4487 9278 4492 9305 4489 9319 4503 9320
      4504 9328 4515 9331 4527 9352 4533 9352
      4548 9335
TIME...MOT...LOC 0248Z 282DEG 23KT 4537 9328 

HAIL...0.88IN
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, 8:59 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Benton, Isanti, Sherburne	61 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, 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
Jul 12, 9:59 PM CDT	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	61 min
Jul 12, 10:18 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn	57 min
Jul 12, 11:26 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn, Rusk	49 min
Jul 13, 12:03 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire	42 min
Jul 13, 12:17 AM CDT	Special Weather Statement	MPX	Rusk	28 min
Jul 13, 12:37 AM CDT	Special Weather Statement	MPX	Eau Claire	23 min
Jul 13, 2:56 PM CDT	Special Weather Statement	MPX	Polk	34 min
Jul 13, 3:00 PM CDT	Severe Thunderstorm Warning	MPX	Polk	45 min
Jul 13, 3:49 PM CDT	Special Weather Statement	MPX	Polk	41 min
Jul 13, 4:03 PM CDT	Severe Thunderstorm Warning	MPX	Polk	21 min
Jul 13, 4:13 PM CDT	Severe Thunderstorm Warning	MPX	Polk	28 min
Jul 13, 4:36 PM CDT	Special Weather Statement	MPX	Dunn	39 min
Jul 13, 5:25 PM CDT	Special Weather Statement	MPX	Eau Claire	20 min
Jul 13, 5:41 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Saint Croix	31 min
Jul 13, 6:03 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin	31 min
Jul 13, 6:22 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	23 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015 Severe Thunderstorm Warnings in Wisconsin, 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.