Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 32, NWS Sioux Falls, SD

May 4, 2012Murray County, Nobles County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 4, 2012, 1:43 PM CDT for Murray County, Nobles County, Minnesota. It was in force for 47 min. 5 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 4, 2012, 1:43 PM CDT (18:43 UTC)
Expired: May 4, 2012, 2:30 PM CDT
In force: 47 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Murray County, MN, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 18:43 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, 1:48 PM CDT	TSTM WND GST 59	1 Nne Rushmore, MN
May 4, 2:03 PM CDT	TORNADO	6 W Worthington, MN
May 4, 2:10 PM CDT	TORNADO 0	1 N Worthington, MN	TORNADO TOUCHDOWN 3/4 MILES NORTH OF WORTHINGTON NEAR THE AIRPORT.
May 4, 2:15 PM CDT	HAIL 1	2 N Worthington, MN	THUNDERSTORM WINDS FROM 30 TO 60 MILES AN HOUR. REPORTED NEAR WORTHINGTON MUNICIPAL AIRPORT
May 4, 2:28 PM CDT	TORNADO	5 N Round Lake, MN	TORNADO TOUCHDOWN 5 MILES NORTH OF ROUND LAKE 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, 6.7 hours before the alert went out and 205 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.

120 
WUUS53 KFSD 041843
SVRFSD
MNC101-105-041930-
/O.NEW.KFSD.SV.W.0032.120504T1843Z-120504T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
143 PM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MURRAY COUNTY IN SOUTHWEST MINNESOTA...
  NOBLES COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 230 PM CDT

* AT 143 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED NEAR WILMONT...OR 16 MILES NORTHWEST OF WORTHINGTON...AND
  MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FULDA AND WORTHINGTON AROUND 205 PM CDT...
  BREWSTER AROUND 220 PM CDT...

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE KINBRAE
AND DUNDEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4356 9546 4359 9594 4386 9596 4388 9546
      4384 9545
TIME...MOT...LOC 1843Z 264DEG 27KT 4375 9584
WIND...HAIL 60MPH 1.00IN

$$

PS

1 follow-up statement

463 
WWUS53 KFSD 041903
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
203 PM CDT FRI MAY 4 2012

MNC101-105-041930-
/O.CON.KFSD.SV.W.0032.000000T0000Z-120504T1930Z/
MURRAY MN-NOBLES MN-
203 PM CDT FRI MAY 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN NOBLES
AND SOUTHEASTERN MURRAY COUNTIES UNTIL 230 PM CDT...

AT 203 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES
SOUTH OF FULDA...OR 10 MILES NORTH OF WORTHINGTON...MOVING EAST AT 30
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WORTHINGTON AROUND 215 PM CDT...
  BREWSTER AROUND 220 PM CDT...

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE KINBRAE
AND DUNDEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4356 9546 4359 9588 4384 9580 4388 9546
      4384 9545
TIME...MOT...LOC 1903Z 264DEG 27KT 4376 9563
WIND...HAIL 60MPH 1.00IN

$$
SCHUMACHER

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 2:06 PM CDT	Tornado Warning	FSD	Jackson, Nobles	24 min
May 4, 2:18 PM CDT	Tornado Warning	FSD	Jackson, Nobles	27 min
May 4, 2:24 PM CDT	Tornado Warning	FSD	Jackson	36 min
May 4, 2:43 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood, Jackson	32 min
May 4, 2:58 PM CDT	Tornado Warning	FSD	Jackson	32 min
May 4, 3:06 PM CDT	Severe Thunderstorm Warning	FSD	Jackson	24 min
May 4, 3:23 PM CDT	Severe Thunderstorm Warning	FSD	Jackson	37 min
May 4, 3:48 PM CDT	Flash Flood Warning	FSD	Jackson, Nobles	5 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.