Alert archive / North Dakota / Tornado Warnings in 2017

Tornado Warning 25, NWS Grand Forks, ND

July 11, 2017Grand Forks County, Walsh County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 11, 2017, 5:35 PM CDT for Grand Forks County, Walsh County, North Dakota. It was in force for 40 min. 6 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 11, 2017, 5:35 PM CDT (22:35 UTC)
Expired: Jul 11, 2017, 6:15 PM CDT
In force: 40 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Grand Forks County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 73 km from the middle of the area, began a volume at 22:36 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 11, 5:39 PM CDT	TORNADO 1	5 Ssw Veseleyville, ND	PARTIALLY RAIN WRAPPED TORNADO BETWEEN PISEK AND VOSS. DAMAGE SURVEY FOUND LARGE BRANCHES DOWN AND A FEW FRESHLY SNAPPED POPLAR TREES IN SHELTER BELTS ALONG A NEARLY 2 MILE TRACK TO AROUND 4W VOSS BY 543. TRIM WAS DAMAGED ON A HOUSE AT ONE FARMSTEAD. PEAK WIND
Jul 11, 5:44 PM CDT	FUNNEL CLOUD	1 N Inkster, ND	RAPIDLY PRODUCED WALL CLOUD, THEN FUNNEL DEVELOPED. COULD NOT DETERMINE WHETHER FUNNEL WAS REACHING THE GROUND
Jul 11, 5:44 PM CDT	FUNNEL CLOUD	3 N Inkster, ND	RAPIDLY PRODUCED WALL CLOUD, THEN FUNNEL DEVELOPED. COULD NOT DETERMINE WHETHER FUNNEL WAS REACHING THE GROUND
Jul 11, 5:44 PM CDT	FUNNEL CLOUD	3 Nnw Inkster, ND	RAPIDLY PRODUCED WALL CLOUD, THEN FUNNEL DEVELOPED. COULD NOT DETERMINE WHETHER FUNNEL WAS REACHING THE GROUND
Jul 11, 5:51 PM CDT	TORNADO 0	3 Ene Inkster, ND	A PERSISTENT FUNNEL CLOUD WITH INTERMITTENT TOUCHDOWNS WAS OBSERVED PASSING NORTHEAST OF INKSTER. DAMAGE SURVEY FOUND LARGE, FRESHLY BROKEN TREE BRANCHES AND LIMBS AT ONE FARMSTEAD AND IN SHELTER BELTS ALONG A ROUGHLY MILE LONG PATH. THE PATH ENDING AROUND 4EN
Jul 11, 6:00 PM CDT	HAIL 1	1 S Forest River, ND	QUARTER SIZED HAIL VIA HAM RADIO

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 11, 4:48 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 10.6 hours before the alert went out and 295 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: 1554 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

472 
WFUS53 KFGF 112235
TORFGF
NDC035-099-112315-
/O.NEW.KFGF.TO.W.0025.170711T2235Z-170711T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Eastern ND/Grand Forks ND
535 PM CDT TUE JUL 11 2017

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  North central Grand Forks County in northeastern North Dakota...
  Southeastern Walsh County in northeastern North Dakota...

* Until 615 PM CDT.

* At 534 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Conway, or 18 miles southwest of Grafton, moving
  east at 30 mph.

  HAZARD...Tornado and golf ball size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Johnstown around 550 PM CDT. 
  Forest River around 555 PM CDT. 
  Minto and Ardoch around 605 PM CDT. 
  Warsaw, Oslo and Poland around 615 PM CDT. 

This includes Interstate 29 between mile markers 151 and 168.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4831 9715 4819 9714 4818 9715 4818 9714
      4817 9715 4815 9714 4814 9715 4814 9714
      4805 9713 4815 9772 4826 9780
TIME...MOT...LOC 2234Z 260DEG 25KT 4822 9767 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

Gust

1 follow-up statement

542 
WWUS53 KFGF 112255
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
555 PM CDT TUE JUL 11 2017

NDC035-099-112315-
/O.CON.KFGF.TO.W.0025.000000T0000Z-170711T2315Z/
Grand Forks ND-Walsh ND-
555 PM CDT TUE JUL 11 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR NORTH
CENTRAL GRAND FORKS AND SOUTHEASTERN WALSH COUNTIES...
    
At 555 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Inkster, or 17 miles southwest of Grafton, moving
east at 20 mph.

HAZARD...Tornado and golf ball size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Forest River and Johnstown around 610 PM CDT. 
  Minto and Ardoch around 615 PM CDT. 

This includes Interstate 29 between mile markers 151 and 168.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4831 9715 4819 9714 4818 9715 4818 9714
      4817 9715 4815 9714 4814 9715 4814 9714
      4805 9713 4815 9772 4826 9780
TIME...MOT...LOC 2255Z 263DEG 17KT 4818 9757 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

Gust

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 5:09 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	66 min
Jul 11, 5:15 PM CDT	Tornado Warning Tornado observed	FGF	Cavalier, Towner	45 min
Jul 11, 5:25 PM CDT	Tornado Warning	FGF	Walsh	50 min
Jul 11, 5:45 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	60 min
Jul 11, 5:46 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	59 min
Jul 11, 5:48 PM CDT	Tornado Warning	FGF	Cavalier, Ramsey, Walsh	42 min
Jul 11, 6:01 PM CDT	Tornado Warning	FGF	Grand Forks	44 min
Jul 11, 6:16 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Walsh	44 min
Jul 11, 6:21 PM CDT	Tornado Warning	FGF	Grand Forks, Walsh	39 min
Jul 11, 6:27 PM CDT	Tornado Warning	FGF	Cavalier, Pembina, Walsh	48 min
Jul 11, 6:42 PM CDT	Tornado Warning	FGF	Grand Forks, Steele, Traill	48 min
Jul 11, 6:49 PM CDT	Areal Flood Advisory	FGF	Walsh	2 hr

Nearby

Tornado Warnings in North Dakota, 2017 Every tornado warning in 2017 Tornadoes 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.