Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Grand Forks, ND

May 18, 2012Otter Tail County, Wadena County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 18, 2012, 10:49 PM CDT for Otter Tail County, Wadena County, Minnesota. It was in force for 42 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 18, 2012, 10:49 PM CDT (03:49 UTC)
Expired: May 18, 2012, 11:31 PM CDT
In force: 42 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Otter Tail County, MN, Wadena County, MN

What was reported inside it

Time	Report	Where	Remark
May 18, 10:55 PM CDT	HAIL 1	4 Nne Wadena, MN	NICKEL TO QUARTER SIZE HAIL FELL WITH GUSTY WINDS. GARDEN DAMAGE REPORTED.

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 00:00Z, 3.8 hours before the alert went out and 226 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: 20 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 3382 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 63 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.

294 
WUUS53 KFGF 190349
SVRFGF
MNC111-159-190445-
/O.NEW.KFGF.SV.W.0009.120519T0349Z-120519T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1049 PM CDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...
  WADENA COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1145 PM CDT

* AT 1045 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE
  STORM WAS LOCATED NEAR WADENA...OR 43 MILES SOUTHEAST OF DETROIT
  LAKES...MOVING TO THE NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLUE GRASS AROUND 1105 PM CDT.
  SEBEKA AROUND 1110 PM CDT.
  MENAHGA AND OYLEN AROUND 1120 PM CDT.
  NIMROD AROUND 1125 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE HUNTERSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

&&

LAT...LON 4680 9507 4679 9479 4651 9480 4638 9503
      4651 9531
TIME...MOT...LOC 0349Z 218DEG 24KT 4646 9510
WIND...HAIL <50MPH 1.00IN

$$
DK

2 follow-up statements

954 
WWUS53 KFGF 190416
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1116 PM CDT FRI MAY 18 2012

MNC111-190425-
/O.CAN.KFGF.SV.W.0009.000000T0000Z-120519T0445Z/
OTTER TAIL MN-
1116 PM CDT FRI MAY 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL OTTER TAIL COUNTY
IN WEST CENTRAL MINNESOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF OTTER TAIL 
COUNTY.

LAT...LON 4651 9480 4643 9503 4644 9514 4675 9511
      4679 9508 4679 9479
TIME...MOT...LOC 0415Z 218DEG 24KT 4660 9494

$$

MNC159-190445-
/O.CON.KFGF.SV.W.0009.000000T0000Z-120519T0445Z/
WADENA MN-
1116 PM CDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WADENA COUNTY
IN CENTRAL MINNESOTA UNTIL 1145 PM CDT...

AT 1112 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THE
STORM WAS LOCATED 3 MILES NORTHEAST OF BLUE GRASS...OR 45 MILES EAST
OF DETROIT LAKES...MOVING TO THE NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MENAHGA AND NIMROD AROUND 1125 PM CDT.
  HUNTERSVILLE AROUND 1140 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

&&

LAT...LON 4651 9480 4643 9503 4644 9514 4675 9511
      4679 9508 4679 9479
TIME...MOT...LOC 0415Z 218DEG 24KT 4660 9494

$$

DTR

083 
WWUS53 KFGF 190431
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1131 PM CDT FRI MAY 18 2012

MNC159-190440-
/O.CAN.KFGF.SV.W.0009.000000T0000Z-120519T0445Z/
WADENA MN-
1131 PM CDT FRI MAY 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR WADENA COUNTY IN CENTRAL
MINNESOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. THERE ARE NUMEROUS SHOWERS AND THUNDERSTORMS OVER WADENA 
COUNTY BUT ALL HAVE DECREASED IN INTENSITY.  SOME PEA SIZE HAIL 
POSSIBLE FROM ANY STORM....BUT ONE INCH OR GREATER HAIL SIZE IS NO 
LONGER ANTICIAPTED. 


LAT...LON 4651 9480 4643 9503 4644 9514 4675 9511
      4679 9508 4679 9479
TIME...MOT...LOC 0430Z 218DEG 24KT 4668 9485

$$

DTR

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	65 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.