Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 64, NWS Twin Cities, MN

May 18, 2012Kandiyohi County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 18, 2012, 9:45 PM CDT for Kandiyohi County, Minnesota. It was in force for 45 min. 2 reports 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: May 18, 2012, 9:45 PM CDT (02:45 UTC)
Expired: May 18, 2012, 10:30 PM CDT
In force: 45 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Kandiyohi County, MN

The radar

The Minneapolis radar (KMPX), 123 km from the middle of the area, began a volume at 02:46 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
May 18, 9:47 PM CDT	HAIL 1.75	5 Wnw Spicer, MN	HAIL WITH STRONG WIND. POWER IS OUT.
May 18, 10:05 PM CDT	HAIL 0.5	New London, MN	DIME SIZE HAIL COVERING THE GROUND.

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 00:00Z, 2.8 hours before the alert went out and 121 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: 20 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 3382 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

930 
WUUS53 KMPX 190245
SVRMPX
MNC067-190330-
/O.NEW.KMPX.SV.W.0064.120519T0245Z-120519T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
945 PM CDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN KANDIYOHI COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1030 PM CDT

* AT 941 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR SPICER...OR ABOUT 6 MILES NORTH OF
  WILLMAR...AND MOVING NORTH AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  SPICER...
  NEW LONDON...

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 4540 9509 4541 9478 4514 9491 4515 9512
TIME...MOT...LOC 0245Z 193DEG 21KT 4523 9502
WIND...HAIL 60MPH 1.00IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 8:21 PM CDT	Special Weather Statement	MPX	Redwood	39 min
May 18, 9:34 PM CDT	Special Weather Statement	MPX	Kandiyohi	41 min
May 18, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	27 min
May 18, 11:13 PM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	47 min
May 18, 11:46 PM CDT	Severe Thunderstorm Warning	MPX	Todd	23 min
May 19, 4:38 PM CDT	Severe Thunderstorm Warning	MPX	Renville	32 min
May 19, 5:17 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Renville, Sibley	58 min
May 19, 5:53 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Wright	52 min
May 19, 6:17 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	43 min
May 19, 6:33 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Sherburne	27 min
May 19, 6:36 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington	54 min
May 19, 6:54 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Isanti	38 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.