Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 101, NWS Grand Forks, ND

July 21, 2017Beltrami County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2017, 3:37 PM CDT for Beltrami County, Minnesota. It was in force for 23 min. 4 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: Jul 21, 2017, 3:37 PM CDT (20:37 UTC)
Expired: Jul 21, 2017, 4:00 PM CDT
In force: 23 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Beltrami County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 205 km from the middle of the area, began a volume at 20:39 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
Jul 21, 3:40 PM CDT	HAIL 1	2 Se Saum, MN	MOSTLY PEA TO MARBLE SIZED HAIL.
Jul 21, 3:45 PM CDT	TORNADO 1	10 W Kelliher, MN	THIS TORNADO TRACKED EASTWARD WITH NUMEROUS INTERMITTENT TOUCHDOWNS ALONG A ROUGHLY 3 MILE TRACK ALONG CR34 TO AROUND 7W OF KELLIHER BY 350 PM CDT. NUMEROUS TREES WERE SNAPPED AND A COUPLE OF GRAIN BINS WERE TOPPLED. ROOF PANELS AND WALLS WERE BLOWN OUT OF POL
Jul 21, 3:45 PM CDT	TORNADO	8 W Kelliher, MN	MULTIPLE BRIEF TOUCHDOWNS OBSERVED OVER A HALF MINUTE PERIOD. GRAIN BINS AND OTHER FARM BUILDINGS DAMAGED.
Jul 21, 4:06 PM CDT	TSTM WND GST 60	Shooks, MN	PEAK WINDS MEASURED AT AN RWIS STATION.

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
Jul 21, 3:07 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 8.6 hours before the alert went out and 122 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: 1908 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

666 
WUUS53 KFGF 212037
SVRFGF
MNC007-212100-
/O.NEW.KFGF.SV.W.0101.170721T2037Z-170721T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Eastern ND/Grand Forks ND
337 PM CDT FRI JUL 21 2017

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  East central Beltrami County in north central Minnesota...

* Until 400 PM CDT.

* At 336 PM CDT, a severe thunderstorm was located over Saum, or 35
  miles north of Bemidji, moving east at 55 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...
  Kelliher and Shooks around 350 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4787 9482 4808 9481 4808 9442 4785 9442
TIME...MOT...LOC 2036Z 271DEG 48KT 4798 9468 

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

JK

1 follow-up statement

556 
WWUS53 KFGF 212059
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
359 PM CDT FRI JUL 21 2017

MNC007-212108-
/O.EXP.KFGF.SV.W.0101.000000T0000Z-170721T2100Z/
Beltrami MN-
359 PM CDT FRI JUL 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BELTRAMI COUNTY
WILL EXPIRE AT 400 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
north central Minnesota.

LAT...LON 4787 9482 4808 9481 4808 9442 4785 9442
TIME...MOT...LOC 2058Z 271DEG 48KT 4797 9426 

$$

JK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:12 PM CDT	Special Weather Statement	FGF	Roseau	63 min
Jul 21, 1:57 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Lake of the Woods, Marshall	46 min
Jul 21, 4:10 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	65 min
Jul 21, 4:15 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Polk, Red Lake	60 min
Jul 21, 4:51 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Polk	54 min
Jul 21, 4:51 PM CDT	Severe Thunderstorm Warning	FGF	Clay	54 min
Jul 21, 5:18 PM CDT	Special Weather Statement	FGF	Norman	57 min
Jul 21, 5:22 PM CDT	Special Weather Statement	FGF	Beltrami	53 min
Jul 21, 5:29 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clearwater, Mahnomen	61 min
Jul 21, 5:44 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater, Hubbard	35 min
Jul 21, 5:49 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail, Wilkin	56 min
Jul 21, 6:28 PM CDT	Severe Thunderstorm Warning	FGF	Becker	31 min
Jul 21, 6:57 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wilkin	63 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every severe thunderstorm warning in 2017

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.