Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 208, NWS Twin Cities, MN

July 3, 20124 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 3, 2012, 2:02 AM CDT for 4 counties in Minnesota. It was in force for 28 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 3, 2012, 2:02 AM CDT (07:02 UTC)
Expired
Jul 3, 2012, 2:30 AM CDT
In force
28 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Benton County, MN, Mille Lacs County, MN, Morrison County, MN, Stearns County, MN

The radar

The Minneapolis radar (KMPX), 101 km from the middle of the area, began a volume at 07:04 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 7.0 hours before the alert went out and 100 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2012-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2216 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2012-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2216 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
2064 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.5

Open this sounding in Storm Lab

The text

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

849 
WUUS53 KMPX 030702
SVRMPX
MNC009-095-097-145-030730-
/O.NEW.KMPX.SV.W.0208.120703T0702Z-120703T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
202 AM CDT TUE JUL 3 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BENTON COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHERN MORRISON COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN STEARNS COUNTY IN CENTRAL MINNESOTA...

* UNTIL 230 AM CDT

* AT 200 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60
  MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MORA TO
  LITTLE ROCK...AND MOVING SOUTHEAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MILACA...
  ST CLOUD...
  PRINCETON...
  LITTLE ROCK...
  MORRILL...
  RICE...
  ST STEPHEN...
  ROYALTON...
  ST JOSEPH...
  COLLEGEVILLE...
  HOLDINGFORD...
  AVON...
  ELMDALE...
  UPSALA...

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 4577 9351 4556 9351 4555 9465 4585 9464
      4586 9354
TIME...MOT...LOC 0702Z 311DEG 43KT 4588 9335 4575 9406
WIND...HAIL 60MPH 1.00IN

$$
1 follow-up statement
607 
WWUS53 KMPX 030729
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
229 AM CDT TUE JUL 3 2012

MNC009-095-097-145-030743-
/O.EXP.KMPX.SV.W.0208.000000T0000Z-120703T0730Z/
BENTON MN-MILLE LACS MN-MORRISON MN-STEARNS MN-
229 AM CDT TUE JUL 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN STEARNS...
SOUTHERN MORRISON...SOUTHERN MILLE LACS AND BENTON COUNTIES WILL
EXPIRE AT 230 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 4577 9351 4556 9351 4555 9465 4585 9464
      4586 9354
TIME...MOT...LOC 0728Z 311DEG 43KT 4566 9302 4554 9373

$$

JPC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 12:12 AM CDTSpecial Weather StatementMPXTodd48 min
Jul 3, 12:22 AM CDTSevere Thunderstorm WarningMPXTodd38 min
Jul 3, 12:55 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison, Todd65 min
Jul 3, 1:46 AM CDTSpecial Weather StatementMPXRedwood, Renville44 min
Jul 3, 2:15 AM CDTTornado WarningMPXSherburne30 min
Jul 3, 2:36 AM CDTSpecial Weather StatementMPXWright39 min
Jul 3, 2:42 AM CDTSpecial Weather StatementMPXAnoka, Chisago, Ramsey48 min
Jul 3, 2:53 AM CDTSpecial Weather StatementMPXHennepin37 min
Jul 3, 3:25 AM CDTSevere Thunderstorm WarningMPXAnoka, Dakota, Hennepin, Ramsey, Washington50 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.