Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 121, NWS Sioux Falls, SD

May 26, 2012Lyon County, Murray County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 26, 2012, 7:41 AM CDT for Lyon County, Murray County, Minnesota. It was in force for 34 min. 3 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 26, 2012, 7:41 AM CDT (12:41 UTC)
Expired: May 26, 2012, 8:15 AM CDT
In force: 34 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Lyon County, MN, Murray County, MN

The radar

The Sioux Falls radar (KFSD), 115 km from the middle of the area, began a volume at 12:44 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
May 26, 7:42 AM CDT	HAIL 1.25	Balaton, MN
May 26, 8:05 AM CDT	HAIL 1	Tracy, MN
May 26, 8:05 AM CDT	HAIL 1.75	1 S Tracy, 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, 0.7 hours before the alert went out and 175 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: 858 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 268 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.

194 
WUUS53 KFSD 261241
SVRFSD
MNC083-101-261315-
/O.NEW.KFSD.SV.W.0121.120526T1241Z-120526T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
741 AM CDT SAT MAY 26 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LYON COUNTY IN SOUTHWEST MINNESOTA...
  NORTH CENTRAL MURRAY COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 815 AM CDT

* AT 742 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR
  SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED NEAR BALATON...OR 14 MILES NORTH OF SLAYTON...AND MOVING
  NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TRACY AROUND 800 AM CDT...

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 4443 9559 4421 9559 4420 9554 4419 9554
      4404 9582 4426 9601 4450 9564
TIME...MOT...LOC 1242Z 229DEG 32KT 4420 9583
WIND...HAIL 60MPH 1.25IN

$$

MJF

2 follow-up statements

698 
WWUS53 KFSD 261253
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
753 AM CDT SAT MAY 26 2012

MNC083-101-261315-
/O.CON.KFSD.SV.W.0121.000000T0000Z-120526T1315Z/
LYON MN-MURRAY MN-
753 AM CDT SAT MAY 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
MURRAY AND SOUTHEASTERN LYON COUNTIES UNTIL 815 AM CDT...

AT 753 AM 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 5 MILES
EAST OF BALATON...OR 16 MILES SOUTH OF MARSHALL...MOVING NORTHEAST AT
35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TRACY AROUND 800 AM CDT...

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 4443 9559 4421 9559 4420 9554 4419 9554
      4404 9582 4426 9601 4450 9564
TIME...MOT...LOC 1253Z 229DEG 32KT 4424 9573
WIND...HAIL 60MPH 1.00IN

$$

MJF

648 
WWUS53 KFSD 261316
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
816 AM CDT SAT MAY 26 2012

MNC083-101-261326-
/O.EXP.KFSD.SV.W.0121.000000T0000Z-120526T1315Z/
LYON MN-MURRAY MN-
816 AM CDT SAT MAY 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MURRAY AND
SOUTHEASTERN LYON COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA...HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH 
MORE STORMS TO THE SOUTH IN MURRAY COUNTY. 

LAT...LON 4443 9559 4421 9559 4420 9554 4419 9554
      4404 9582 4426 9601 4450 9564
TIME...MOT...LOC 1253Z 229DEG 32KT 4424 9573

$$

MJF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 10:41 AM CDT	River Flood Warning	FSD	Pipestone	20 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.