Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS Twin Cities, MN

May 8, 2014McLeod County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 8, 2014, 7:50 PM CDT for McLeod County, Sibley County, Minnesota. It was in force for 40 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 8, 2014, 7:50 PM CDT (00:50 UTC)
Expired: May 8, 2014, 8:30 PM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McLeod County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 61 km from the middle of the area, began a volume at 00:50 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 8, 7:55 PM CDT	HAIL 1	6 Sse Stewart, MN
May 8, 7:58 PM CDT	HAIL 1.75	4 Nw Winthrop, MN
May 8, 8:04 PM CDT	TORNADO	4 Nw Gaylord, 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 8, 1:46 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.8 hours before the alert went out and 59 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: 18 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 785 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

765 
WUUS53 KMPX 090050
SVRMPX
MNC085-143-090130-
/O.NEW.KMPX.SV.W.0021.140509T0050Z-140509T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
750 PM CDT THU MAY 8 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  WESTERN SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 830 PM CDT

* AT 746 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES WEST OF
  GAYLORD...AND MOVING NORTHEAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
           ROOFS...SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE...
  LAKE MARION REGIONAL PARK...GLENCOE...BROWNTON...NEW AUBURN...
  SUMTER...BISCAY...GLENCOE AIRPORT AND PLATO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4465 9455 4488 9434 4485 9401 4467 9401
      4450 9441
TIME...MOT...LOC 0050Z 229DEG 33KT 4461 9437

HAIL...1.00IN
WIND...60MPH

$$

JRB

4 follow-up statements

551 
WWUS53 KMPX 090055
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
755 PM CDT THU MAY 8 2014

MNC085-143-090130-
/O.CON.KMPX.SV.W.0021.000000T0000Z-140509T0130Z/
MCLEOD MN-SIBLEY MN-
755 PM CDT THU MAY 8 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN SIBLEY
AND SOUTHERN MCLEOD COUNTIES UNTIL 830 PM CDT...

AT 750 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES NORTHWEST
OF GAYLORD...AND MOVING NORTHEAST AT 40 MPH.

HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
LAKE MARION REGIONAL PARK...GLENCOE...BROWNTON...NEW AUBURN...
SUMTER...BISCAY...GLENCOE AIRPORT AND PLATO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!

&&

LAT...LON 4459 9448 4463 9447 4463 9450 4470 9451
      4488 9434 4485 9401 4467 9401 4450 9441
TIME...MOT...LOC 0055Z 229DEG 33KT 4464 9432

HAIL...1.75IN
WIND...60MPH

$$

JRB

767 
WWUS53 KMPX 090103
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
803 PM CDT THU MAY 8 2014

MNC085-143-090130-
/O.CON.KMPX.SV.W.0021.000000T0000Z-140509T0130Z/
MCLEOD MN-SIBLEY MN-
803 PM CDT THU MAY 8 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL SIBLEY
AND SOUTHERN MCLEOD COUNTIES UNTIL 830 PM CDT...

AT 800 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES NORTHWEST
OF GAYLORD...AND MOVING NORTHEAST AT 40 MPH.

HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
LAKE MARION REGIONAL PARK...GLENCOE...NEW AUBURN...SUMTER...BISCAY...
GLENCOE AIRPORT AND PLATO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!

&&

LAT...LON 4464 9442 4477 9444 4488 9434 4485 9401
      4467 9401 4452 9436
TIME...MOT...LOC 0103Z 227DEG 33KT 4467 9428

HAIL...1.75IN
WIND...60MPH

$$

JRB

855 
WWUS53 KMPX 090109
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
809 PM CDT THU MAY 8 2014

MNC085-143-090130-
/O.CON.KMPX.SV.W.0021.000000T0000Z-140509T0130Z/
MCLEOD MN-SIBLEY MN-
809 PM CDT THU MAY 8 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL SIBLEY
AND SOUTHEASTERN MCLEOD COUNTIES UNTIL 830 PM CDT...

AT 804 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTHWEST
OF GAYLORD...AND MOVING NORTHEAST AT 30 MPH.

HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...RADAR INDICATED.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
GLENCOE...NEW AUBURN...SUMTER...GLENCOE AIRPORT AND PLATO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!

&&

LAT...LON 4452 9436 4472 9440 4486 9413 4485 9401
      4467 9401
TIME...MOT...LOC 0109Z 223DEG 26KT 4466 9423

HAIL...1.75IN
WIND...60MPH

$$

JRB

050 
WWUS53 KMPX 090117
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
817 PM CDT THU MAY 8 2014

MNC085-143-090130-
/O.CON.KMPX.SV.W.0021.000000T0000Z-140509T0130Z/
MCLEOD MN-SIBLEY MN-
817 PM CDT THU MAY 8 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
SIBLEY AND EAST CENTRAL MCLEOD COUNTIES UNTIL 830 PM CDT...

AT 813 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTH OF
GLENCOE...AND MOVING NORTHEAST AT 30 MPH.

HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZE HAIL.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
         DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
GLENCOE...GLENCOE AIRPORT AND PLATO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!

&&

LAT...LON 4478 9428 4486 9413 4485 9401 4467 9401
      4458 9422 4458 9424
TIME...MOT...LOC 0117Z 223DEG 26KT 4470 9417

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH

$$

JRB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 7:23 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Sibley	22 min
May 8, 8:05 PM CDT	Tornado Warning Tornado observed	MPX	Sibley	25 min
May 8, 8:38 PM CDT	Special Weather Statement	MPX	Anoka, Carver, Hennepin, Isanti	67 min
May 8, 9:33 PM CDT	Special Weather Statement	MPX	Isanti	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014 Every severe thunderstorm warning in 2014

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.