Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 49, NWS Twin Cities, MN

May 4, 2012Faribault County, Martin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 4, 2012, 4:22 PM CDT for Faribault County, Martin County, Minnesota. It was in force for 38 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: May 4, 2012, 4:22 PM CDT (21:22 UTC)
Expired: May 4, 2012, 5:00 PM CDT
In force: 38 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.75 in
Wind: 65.0 mph

Counties Faribault County, MN, Martin County, MN

The radar

The Minneapolis radar (KMPX), 154 km from the middle of the area, began a volume at 21:26 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 4, 4:22 PM CDT	HAIL 0.75	1 Ne Fairmont, MN

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 4, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.4 hours before the alert went out and 153 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1101 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: 15 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.

727 
WUUS53 KMPX 042122
SVRMPX
MNC043-091-042200-
/O.NEW.KMPX.SV.W.0049.120504T2122Z-120504T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
422 PM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN FARIBAULT COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHEASTERN MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 500 PM CDT

* AT 416 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING
  WINDS OF 65 MPH. THIS STORM WAS LOCATED NEAR FAIRMONT...AND MOVING
  EAST AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  FAIRMONT...EAST CHAIN...GUCKEEN...PILOT GROVE...IMOGENE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE WINDOWS...SIDING AND VEHICLES. DAMAGING WINDS
ARE ALSO EXPECTED...WHICH WILL UPROOT TREES AND DOWN POWER LINES.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

&&

LAT...LON 4351 9448 4373 9453 4368 9412 4349 9412
TIME...MOT...LOC 2121Z 280DEG 20KT 4358 9445
WIND...HAIL 65MPH 1.75IN

$$

BAP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 7:00 PM CDT	Special Weather Statement	MPX	Goodhue	30 min
May 4, 2:07 PM CDT	Special Weather Statement	MPX	Redwood	38 min
May 4, 2:33 PM CDT	Special Weather Statement	MPX	Blue Earth, Martin, Watonwan	57 min
May 4, 3:10 PM CDT	Tornado Warning	MPX	Martin	35 min
May 4, 3:40 PM CDT	Tornado Warning	MPX	Martin	50 min
May 4, 4:07 PM CDT	Special Weather Statement	MPX	Blue Earth, Waseca, Watonwan	38 min
May 4, 4:32 PM CDT	Severe Thunderstorm Warning	MPX	Martin	13 min
May 4, 5:00 PM CDT	Special Weather Statement	MPX	Faribault	45 min
May 4, 5:41 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	49 min
May 4, 5:52 PM CDT	Tornado Warning	MPX	Faribault, Freeborn	23 min
May 4, 6:15 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn	45 min
May 4, 6:21 PM CDT	Tornado Warning	MPX	Freeborn	24 min
May 4, 6:24 PM CDT	Areal Flood Advisory	MPX	Blue Earth, Faribault, Martin, Watonwan	3 hr

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.