Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 225, NWS Twin Cities, MN

July 13, 2012Hennepin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 13, 2012, 4:39 PM CDT for Hennepin County, Minnesota. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 13, 2012, 4:39 PM CDT (21:39 UTC)
Expired: Jul 13, 2012, 5:20 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Hennepin County, MN

The radar

The Minneapolis radar (KMPX), 13 km from the middle of the area, began a volume at 21:40 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.

What was reported inside it

Time	Report	Where	Remark
Jul 13, 4:42 PM CDT	HAIL 0.88	Medina, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.7 hours before the alert went out and 13 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: 420 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 1382 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

199 
WUUS53 KMPX 132139
SVRMPX
MNC053-132230-
/O.NEW.KMPX.SV.W.0225.120713T2139Z-120713T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
439 PM CDT FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 530 PM CDT

* AT 435 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR DELANO...OR ABOUT 12 MILES SOUTHEAST OF
  BUFFALO...AND MOVING EAST AT 15 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  INDEPENDENCE...
  ST BONIFACIUS...
  MINNETRISTA...
  MAPLE PLAIN...
  MOUND...
  MEDINA...
  ORONO...
  LONG LAKE...
  SHOREWOOD...
  EXCELSIOR...
  WOODLAND...
  WAYZATA...
  DEEPHAVEN...
  MINNETONKA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4498 9337 4489 9352 4489 9377 4498 9377
      4508 9376
TIME...MOT...LOC 2138Z 291DEG 11KT 4502 9375
WIND...HAIL 60MPH 1.00IN

$$

2 follow-up statements

031 
WWUS53 KMPX 132157
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
457 PM CDT FRI JUL 13 2012

MNC053-132230-
/O.CON.KMPX.SV.W.0225.000000T0000Z-120713T2230Z/
HENNEPIN MN-
457 PM CDT FRI JUL 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
HENNEPIN COUNTY UNTIL 530 PM CDT...

AT 453 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS OF 60 MPH.  THIS STORM WAS LOCATED NEAR LONG LAKE...OR 5 MILES
WEST OF PLYMOUTH...MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  SHOREWOOD...EXCELSIOR...WAYZATA...DEEPHAVEN...WOODLAND...MINNETONKA
  AND THE LAKE MINNETONKA AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4489 9372 4502 9371 4506 9367 4498 9337
      4489 9352
TIME...MOT...LOC 2157Z 285DEG 12KT 4501 9355
WIND...HAIL 60MPH 1.00IN

$$

LS

176 
WWUS53 KMPX 132220
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
520 PM CDT FRI JUL 13 2012

MNC053-132235-
/O.CAN.KMPX.SV.W.0225.000000T0000Z-120713T2230Z/
HENNEPIN MN-
520 PM CDT FRI JUL 13 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HENNEPIN COUNTY IS
CANCELLED...

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

LAT...LON 4489 9372 4502 9371 4506 9367 4498 9337
      4489 9352
TIME...MOT...LOC 2220Z 285DEG 12KT 4499 9345

$$

LS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 7:50 PM CDT	Special Weather Statement	MPX	Pope, Stevens	40 min
Jul 12, 9:14 PM CDT	Special Weather Statement	MPX	Douglas	46 min
Jul 12, 9:44 PM CDT	Special Weather Statement	MPX	Big Stone	46 min
Jul 12, 10:01 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	29 min
Jul 12, 10:25 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Swift	35 min
Jul 13, 8:59 AM CDT	Special Weather Statement	MPX	Rice	46 min
Jul 13, 9:18 AM CDT	Special Weather Statement	MPX	Goodhue	57 min
Jul 13, 1:04 PM CDT	Special Weather Statement	MPX	Morrison	41 min
Jul 13, 1:05 PM CDT	Special Weather Statement	MPX	Yellow Medicine	40 min
Jul 13, 1:09 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	38 min
Jul 13, 1:30 PM CDT	Special Weather Statement	MPX	Renville	45 min
Jul 13, 2:00 PM CDT	Special Weather Statement	MPX	Meeker	45 min
Jul 13, 2:22 PM CDT	Special Weather Statement	MPX	Morrison	38 min
Jul 13, 2:25 PM CDT	Special Weather Statement	MPX	Brown	50 min
Jul 13, 3:02 PM CDT	Special Weather Statement	MPX	Meeker	58 min
Jul 13, 3:20 PM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	40 min
Jul 13, 3:48 PM CDT	Special Weather Statement	MPX	Watonwan	42 min
Jul 13, 4:02 PM CDT	Special Weather Statement	MPX	Isanti, Kanabec	43 min
Jul 13, 4:08 PM CDT	Special Weather Statement	MPX	Hennepin	37 min
Jul 13, 4:13 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Wright	62 min
Jul 13, 4:17 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	28 min
Jul 13, 5:08 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	52 min
Jul 13, 5:18 PM CDT	Special Weather Statement	MPX	Rice	42 min
Jul 13, 5:26 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	49 min
Jul 13, 5:39 PM CDT	Areal Flood Advisory	MPX	Dakota, Hennepin, Ramsey, Washington	52 min
Jul 13, 5:39 PM CDT	Special Weather Statement	MPX	Renville	51 min
Jul 13, 5:41 PM CDT	Special Weather Statement	MPX	Martin	49 min
Jul 13, 5:49 PM CDT	Special Weather Statement	MPX	Dakota	41 min
Jul 13, 5:52 PM CDT	Special Weather Statement	MPX	Waseca	23 min
Jul 13, 5:54 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	33 min
Jul 13, 6:08 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	52 min
Jul 13, 6:20 PM CDT	Special Weather Statement	MPX	Rice	25 min
Jul 13, 6:22 PM CDT	Special Weather Statement	MPX	Steele	23 min
Jul 13, 6:33 PM CDT	Special Weather Statement	MPX	Faribault	42 min
Jul 13, 6:45 PM CDT	Special Weather Statement	MPX	Freeborn	45 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.