Alert archive / North Dakota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 113, NWS Grand Forks, ND

July 7, 2008Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 7, 2008, 11:01 AM CDT for Cass County, North Dakota. It was in force for 26 min. 2 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 7, 2008, 11:01 AM CDT (16:01 UTC)
Expired: Jul 7, 2008, 11:27 AM CDT
In force: 26 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon

County Cass County, ND

What was reported inside it

Time	Report	Where	Remark
Jul 7, 11:11 AM CDT	HAIL 1	Davenport, ND
Jul 7, 11:20 AM CDT	HAIL 0.88	5 Wsw Horace, ND

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 4.0 hours before the alert went out and 246 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: 665 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 932 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 071601
SVRFGF
NDC017-071700-
/O.NEW.KFGF.SV.W.0113.080707T1601Z-080707T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1101 AM CDT MON JUL 7 2008

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL NOON CDT

* AT 1059 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL. THE
  STORM WAS LOCATED 2 MILES SOUTHWEST OF DAVENPORT...OR 19 MILES
  SOUTHWEST OF FARGO...MOVING TO THE NORTHEAST AT 26 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAPLETON AT 1130 AM CDT...
  WEST FARGO AT 1135 AM CDT...
  REILES ACRES AT 1145 AM CDT...
  HARWOOD AT 1150 AM CDT...

  INTERSTATE 29 BETWEEN MILE MARKER 64 AROUND 1135 AM CDT...
  AND MILE MARKER 76 AROUND 1155 AM CDT...

  INTERSTATE 94 BETWEEN MILE MARKER 339 AROUND 1125 AM CDT...
  AND MILE MARKER 349 AROUND 1135 AM CDT...

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

LAT...LON 4709 9686 4686 9684 4667 9702 4667 9726
TIME...MOT...LOC 1601Z 213DEG 23KT 4670 9709

$$

HOPKINS

1 follow-up statement

000 
WWUS53 KFGF 071627
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1127 AM CDT MON JUL 7 2008

NDC017-071637-
/O.CAN.KFGF.SV.W.0113.000000T0000Z-080707T1700Z/
CASS ND-
1127 AM CDT MON JUL 7 2008

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CASS COUNTY IN
SOUTHEAST NORTH DAKOTA IS CANCELLED...

AT 1127 AM CDT...THE SEVERE THUNDERSTORM HAS MOVED OUT OF THE WARNED 
AREA IN EAST CENTRAL CASS COUNTY SO THE WARNING HAS BEEN CANCELLED.

LAT...LON 4709 9686 4686 9684 4667 9702 4667 9726
TIME...MOT...LOC 1627Z 213DEG 23KT 4684 9696

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 11:17 AM CDT	Severe Thunderstorm Warning	FGF	Cass	26 min
Jul 7, 2:38 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	67 min
Jul 7, 3:20 PM CDT	Tornado Warning	FGF	Towner	55 min
Jul 7, 3:46 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy, Ramsey	59 min
Jul 7, 4:10 PM CDT	Tornado Warning	FGF	Cavalier, Towner	65 min
Jul 7, 4:42 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Nelson	63 min
Jul 7, 4:55 PM CDT	Tornado Warning	FGF	Griggs, Nelson, Steele	35 min
Jul 7, 5:13 PM CDT	Tornado Warning	FGF	Cavalier, Pembina	62 min
Jul 7, 5:16 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	42 min
Jul 7, 5:27 PM CDT	Tornado Warning	FGF	Steele	33 min
Jul 7, 5:52 PM CDT	Tornado Warning	FGF	Steele, Traill	23 min
Jul 7, 6:00 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	60 min
Jul 7, 6:01 PM CDT	Severe Thunderstorm Warning	FGF	Cass	59 min
Jul 7, 6:18 PM CDT	Severe Thunderstorm Warning	FGF	Traill	28 min
Jul 7, 6:26 PM CDT	Tornado Warning	FGF	Walsh	64 min
Jul 7, 6:49 PM CDT	Severe Thunderstorm Warning	FGF	Cass	56 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2008 Every severe thunderstorm warning in 2008

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.