Alert archive / North Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 113, NWS Grand Forks, ND

July 22, 2017Eddy County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 22, 2017, 12:25 AM CDT for Eddy County, North Dakota. It was in force for 27 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: Jul 22, 2017, 12:25 AM CDT (05:25 UTC)
Expired: Jul 22, 2017, 12:52 AM CDT
In force: 27 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Eddy County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 119 km from the middle of the area, began a volume at 05:29 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 22, 12:46 AM CDT	HAIL 1.25	3 S Hamar, ND	LARGE DIME TO HALF DOLLAR SIZED HAIL FOR A COUPLE OF MINUTES.

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

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.4 hours before the alert went out and 174 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: 2130 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1710 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

935 
WUUS53 KFGF 220525
SVRFGF
NDC027-220615-
/O.NEW.KFGF.SV.W.0113.170722T0525Z-170722T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Eastern ND/Grand Forks ND
1225 AM CDT SAT JUL 22 2017

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Eddy County in northeastern North Dakota...

* Until 115 AM CDT.

* At 1225 AM CDT, a severe thunderstorm was located near New
  Rockford, or 29 miles southwest of Devils Lake, moving east at 35
  mph.

  HAZARD...Quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* this severe thunderstorm will remain over mainly rural areas of
  Eddy County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4784 9923 4784 9853 4767 9852 4759 9851
      4760 9926
TIME...MOT...LOC 0525Z 270DEG 32KT 4773 9913 

HAIL...1.00IN
WIND...<50MPH
 
$$

VG

2 follow-up statements

778 
WWUS53 KFGF 220543
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
1243 AM CDT SAT JUL 22 2017

NDC027-220615-
/O.CON.KFGF.SV.W.0113.000000T0000Z-170722T0615Z/
Eddy ND-
1243 AM CDT SAT JUL 22 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR EDDY COUNTY...

At 1243 AM CDT, a severe thunderstorm was located 9 miles north of
Brantford, or 26 miles south of Devils Lake, moving east at 35 mph.

HAZARD...Quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Damage to vehicles is expected. 

Locations impacted include...
New Rockford and Brantford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4784 9894 4784 9853 4767 9852 4759 9851
      4760 9926
TIME...MOT...LOC 0543Z 270DEG 32KT 4773 9889 

HAIL...1.00IN
WIND...<50MPH
 
$$

VG

467 
WWUS53 KFGF 220552
SVSFGF

Severe Weather Statement
National Weather Service Eastern ND/Grand Forks ND
1252 AM CDT SAT JUL 22 2017

NDC027-220601-
/O.CAN.KFGF.SV.W.0113.000000T0000Z-170722T0615Z/
Eddy ND-
1252 AM CDT SAT JUL 22 2017

...THE SEVERE THUNDERSTORM WARNING FOR EDDY COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.

LAT...LON 4784 9894 4784 9853 4767 9852 4759 9851
      4760 9926
TIME...MOT...LOC 0548Z 270DEG 32KT 4773 9878 

$$

VG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 10:31 PM CDT	Special Weather Statement	FGF	Barnes	44 min
Jul 21, 10:49 PM CDT	Tornado Warning	FGF	Benson	26 min
Jul 21, 11:07 PM CDT	Special Weather Statement	FGF	Ransom	38 min
Jul 21, 11:14 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	46 min
Jul 22, 12:36 AM CDT	Special Weather Statement	FGF	Nelson	24 min
Jul 22, 2:18 AM CDT	Special Weather Statement	FGF	Cass, Traill	27 min
Jul 22, 2:37 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	38 min
Jul 22, 3:07 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	53 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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.