Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 64, NWS Grand Forks, ND

July 15, 2011Barnes County, Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 15, 2011, 4:04 AM CDT for Barnes County, Cass County, North Dakota. It was in force for 56 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 15, 2011, 4:04 AM CDT (09:04 UTC)
Expired: Jul 15, 2011, 5:00 AM CDT
In force: 56 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Barnes County, ND, Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 61 km from the middle of the area, began a volume at 09:04 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 15, 5:00 AM CDT	TSTM WND DMG	3 Nnw Horace, ND	SEVERAL 3 TO 5 INCH TREE BRANCHES WERE BROKEN DOWN IN A A SHELTER BELT.

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 15, 2:56 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 9.1 hours before the alert went out and 251 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: 4277 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 4.1
Supercell composite: 19.7

Open this sounding in Storm Lab

The text

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

981 
WUUS53 KFGF 150904
SVRFGF
NDC003-017-151000-
/O.NEW.KFGF.SV.W.0064.110715T0904Z-110715T1000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
404 AM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BARNES COUNTY IN SOUTHEAST NORTH DAKOTA...
  CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 500 AM CDT

* AT 400 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 3 MILES
  NORTHEAST OF TOWER CITY...OR 18 MILES EAST OF VALLEY CITY...MOVING
  TO THE EAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ERIE...EMBDEN AND ABSARAKA AROUND 410 AM CDT.
  WHEATLAND AND CHAFFEE AROUND 415 AM CDT.
  CASSELTON...ARTHUR AND AMENIA AROUND 420 AM CDT.
  DURBIN AROUND 425 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE MAPLETON...ARGUSVILLE...HORACE AND FARGO.

FOR MOTORISTS ON INTERSTATE 29...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKER 58 AROUND 440 AM CDT...AND MILE MARKER 77
AROUND 435 AM CDT...

FOR MOTORISTS ON INTERSTATE 94...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKER 332 AROUND 425 AM CDT...AND MILE MARKER 345
AROUND 435 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4715 9773 4712 9683 4703 9682 4700 9684
      4700 9682 4674 9680 4673 9771
TIME...MOT...LOC 0904Z 275DEG 47KT 4694 9755
WIND...HAIL 60MPH 1.00IN

$$

HOPPES

1 follow-up statement

317 
WWUS53 KFGF 150939
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
439 AM CDT FRI JUL 15 2011

NDC003-017-151000-
/O.CON.KFGF.SV.W.0064.000000T0000Z-110715T1000Z/
BARNES ND-CASS ND-
439 AM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL CASS
AND EXTREME EAST CENTRAL BARNES COUNTIES IN SOUTHEAST NORTH DAKOTA
UNTIL 500 AM CDT...

AT 437 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORM WAS LOCATED 4 MILES
EAST OF CASSELTON...OR 16 MILES WEST OF FARGO...MOVING TO THE EAST AT
35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAPLETON AND PROSPER AROUND 445 AM CDT.
  ARGUSVILLE AROUND 450 AM CDT.
  HORACE...HARWOOD AND WEST FARGO AROUND 455 AM CDT.
  FARGO...WILD RICE AND PRAIRIE ROSE AROUND 500 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE FRONTIER AND REILE'S ACRES.

FOR MOTORISTS ON INTERSTATE 29...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKERS 64 AND 70 AROUND 500 AM CDT...

FOR MOTORISTS ON INTERSTATE 94...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKER 335 AROUND 440 AM CDT...AND MILE MARKER 345
AROUND 455 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL
POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED
BUILDING IMMEDIATELY.

&&

LAT...LON 4715 9773 4712 9683 4703 9682 4700 9684
      4700 9682 4674 9680 4673 9771
TIME...MOT...LOC 0939Z 275DEG 33KT 4692 9711

$$

HOPPES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 2:11 AM CDT	Severe Thunderstorm Warning	FGF	Griggs	64 min
Jul 15, 2:41 AM CDT	Severe Thunderstorm Warning	FGF	Barnes	64 min
Jul 15, 3:25 AM CDT	Tornado Warning	FGF	Barnes	50 min
Jul 15, 3:53 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland	52 min
Jul 15, 4:03 AM CDT	Excessive Heat Watch	FGF	Barnes, Benson, Cass, Eddy, Grand Forks, Griggs and 9 more	24 hr
Jul 15, 4:18 AM CDT	Tornado Warning	FGF	Ransom, Richland	42 min
Jul 15, 4:50 AM CDT	Severe Thunderstorm Warning	FGF	Richland	55 min
Jul 15, 5:00 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	43 min
Jul 15, 5:11 AM CDT	Areal Flood Advisory	FGF	Barnes	9 hr
Jul 15, 5:12 AM CDT	Tornado Warning	FGF	Richland	39 min
Jul 15, 5:47 AM CDT	Severe Thunderstorm Warning	FGF	Richland	58 min
Jul 15, 3:15 PM CDT	Excessive Heat Warning	FGF	Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 5 more	5 days

Nearby

Severe Thunderstorm Warnings in North Dakota, 2011 Every severe thunderstorm warning in 2011

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.