Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 113, NWS Grand Forks, ND

August 12, 2015Kittson County, Marshall County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 12, 2015, 7:24 PM CDT for Kittson County, Marshall County, Roseau County, Minnesota. It was in force for 66 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: Aug 12, 2015, 7:24 PM CDT (00:24 UTC)
Expired: Aug 12, 2015, 8:30 PM CDT
In force: 66 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kittson County, MN, Marshall County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 150 km from the middle of the area, began a volume at 00:25 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
Aug 12, 7:35 PM CDT	HAIL 0.88	10 Ese Lancaster, MN	HAIL AND A HALF INCH OF RAIN FELL VERY QUICKLY.
Aug 12, 7:45 PM CDT	FUNNEL CLOUD	4 Ene Halma, MN	A PERSISTENT WALL CLOUD WITH ONE OR TWO BRIEF FUNNELS WAS REPORTED. SPOTTER WAS LOCATED WEST OF GREENBUSH.
Aug 12, 8:00 PM CDT	HAIL 1	2 Sw Greenbush, 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
Aug 12, 3:33 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.4 hours before the alert went out and 229 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: 1493 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1383 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 227 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

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

662 
WUUS53 KFGF 130024
SVRFGF
MNC069-089-135-130130-
/O.NEW.KFGF.SV.W.0113.150813T0024Z-150813T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
724 PM CDT WED AUG 12 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN KITTSON COUNTY IN NORTHWESTERN MINNESOTA...
  NORTH CENTRAL MARSHALL COUNTY IN NORTHWESTERN MINNESOTA...
  SOUTHWESTERN ROSEAU COUNTY IN NORTHWESTERN MINNESOTA...

* UNTIL 830 PM CDT

* AT 723 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES NORTHEAST
  OF LAKE BRONSON...OR 35 MILES WEST OF ROSEAU...MOVING EAST AT 25
  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. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  LEO AND HAUG AROUND 755 PM CDT.
  GREENBUSH AROUND 805 PM CDT.
  BADGER AROUND 815 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4873 9669 4896 9659 4878 9586 4843 9618
TIME...MOT...LOC 0023Z 287DEG 23KT 4880 9654 

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

VOELKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 7:51 PM CDT	Tornado Warning	FGF	Kittson, Marshall, Roseau	39 min
Aug 12, 8:13 PM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall, Pennington, Roseau	62 min
Aug 12, 8:16 PM CDT	Special Weather Statement	FGF	Lake of the Woods	59 min
Aug 12, 9:10 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington, Red Lake	65 min
Aug 12, 9:42 PM CDT	Severe Thunderstorm Warning	FGF	Pennington, Polk, Red Lake	63 min
Aug 12, 10:03 PM CDT	Special Weather Statement	FGF	Mahnomen	42 min
Aug 12, 10:05 PM CDT	Special Weather Statement	FGF	Clearwater	55 min
Aug 12, 10:20 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Polk	55 min
Aug 12, 10:42 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Polk	63 min
Aug 12, 11:43 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clearwater, Hubbard, Mahnomen, Otter Tail, Wadena	62 min
Aug 13, 12:42 AM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wadena	48 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015 Every severe thunderstorm warning in 2015

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.