Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 111, NWS Sioux Falls, SD

May 23, 2012Cottonwood County, Jackson County, Nobles County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 23, 2012, 7:35 PM CDT for Cottonwood County, Jackson County, Nobles County, Minnesota. It was in force for 30 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 23, 2012, 7:35 PM CDT (00:35 UTC)
Expired: May 23, 2012, 8:05 PM CDT
In force: 30 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cottonwood County, MN, Jackson County, MN, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 112 km from the middle of the area, began a volume at 00:37 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 23, 7:37 PM CDT	HAIL 0.75	3 S Brewster, MN	HAIL LASTED FOR 9 TO 10 MINUTES
May 23, 7:57 PM CDT	HAIL 1	4 W Lakefield, MN

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

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.6 hours before the alert went out and 271 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: 1035 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2387 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

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

618 
WUUS53 KFSD 240035
SVRFSD
MNC033-063-105-240115-
/O.NEW.KFSD.SV.W.0111.120524T0035Z-120524T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
735 PM CDT WED MAY 23 2012

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL COTTONWOOD COUNTY IN SOUTHWEST MINNESOTA...
  WESTERN JACKSON COUNTY IN SOUTHWEST MINNESOTA...
  EAST CENTRAL NOBLES COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 815 PM CDT

* AT 735 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 BREWSTER...OR 10 MILES EAST OF WORTHINGTON...AND
  MOVING NORTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HERON LAKE AND LAKEFIELD AROUND 745 PM CDT...

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE OKABENA
AND WILDER.

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 4350 9538 4350 9542 4360 9560 4391 9530
      4380 9499
TIME...MOT...LOC 0035Z 216DEG 43KT 4366 9538
WIND...HAIL 60MPH 1.00IN

$$

CHENARD

2 follow-up statements

465 
WWUS53 KFSD 240048
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
748 PM CDT WED MAY 23 2012

MNC105-240058-
/O.CAN.KFSD.SV.W.0111.000000T0000Z-120524T0115Z/
NOBLES MN-
748 PM CDT WED MAY 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NOBLES COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. ADDITIONAL THUNDERSTORMS ARE LIKELY THIS EVENING.

LAT...LON 4379 9501 4360 9526 4377 9543 4391 9530
      4380 9499
TIME...MOT...LOC 0048Z 226DEG 45KT 4374 9525

$$

MNC033-063-240115-
/O.CON.KFSD.SV.W.0111.000000T0000Z-120524T0115Z/
COTTONWOOD MN-JACKSON MN-
748 PM CDT WED MAY 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
JACKSON AND SOUTH CENTRAL COTTONWOOD COUNTIES UNTIL 815 PM CDT...

AT 748 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 6 MILES
SOUTHEAST OF HERON LAKE...OR 13 MILES SOUTHWEST OF WINDOM...MOVING
NORTHEAST AT 50 MPH.

THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHWESTERN JACKSON AND SOUTH CENTRAL COTTONWOOD COUNTIES...
INCLUDING THE FOLLOWING LOCATIONS WILDER.

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 4379 9501 4360 9526 4377 9543 4391 9530
      4380 9499
TIME...MOT...LOC 0048Z 226DEG 45KT 4374 9525
WIND...HAIL 60MPH 1.00IN

$$

CHENARD

107 
WWUS53 KFSD 240105
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
805 PM CDT WED MAY 23 2012

MNC033-063-240113-
/O.CAN.KFSD.SV.W.0111.000000T0000Z-120524T0115Z/
COTTONWOOD MN-JACKSON MN-
805 PM CDT WED MAY 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JACKSON AND SOUTH
CENTRAL COTTONWOOD COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. ADDITIONAL THUNDERSTORMS ARE LIKELY THIS EVENING.

LAT...LON 4379 9501 4360 9526 4377 9543 4391 9530
      4380 9499
TIME...MOT...LOC 0103Z 216DEG 43KT 4393 9510

$$
CHENARD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:10 PM CDT	Severe Thunderstorm Warning	FSD	Nobles	35 min
May 23, 8:28 PM CDT	Severe Thunderstorm Warning	FSD	Jackson, Nobles	32 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.