Alert archive / North Dakota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 39, NWS Grand Forks, ND

June 7, 2007Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2007, 12:48 PM CDT for Cass County, North Dakota. It was in force for 46 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
Jun 7, 2007, 12:48 PM CDT (17:48 UTC)
Expired
Jun 7, 2007, 1:34 PM CDT
In force
46 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 70 km from the middle of the area, began a volume at 17:50 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

TimeReportWhereRemark
Jun 7, 1:20 PM CDTHAIL 0.883 N Embden, ND

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.

IssuedProductOfficeLasted
Jun 7, 11:11 AM CDTTornado WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 5.8 hours before the alert went out and 236 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2007-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2007-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -88 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
26 J/kg
Mixed-layer CIN
-395 J/kg
Mixed-layer LCL
842 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-88 m²/s²
0-3 km storm-relative helicity
-101 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 071748
SVRFGF
NDC017-071845-
/O.NEW.KFGF.SV.W.0039.070607T1748Z-070607T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1248 PM CDT THU JUN 7 2007

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL 145 PM CDT

* AT 1245 PM 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
  SOUTHWEST OF WHEATLAND...OR 27 MILES WEST OF FARGO...MOVING TO THE
  NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WHEATLAND AT 1255 PM CDT...
  CASSELTON AT 110 PM CDT...
  AMENIA AT 120 PM CDT...

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

LAT...LON 4693 9758 4675 9748 4683 9709 4706 9722

$$

GUST/BARRETT
2 follow-up statements
000 
WWUS53 KFGF 071821
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
119 PM CDT THU JUN 7 2007

NDC017-071845-
/O.CON.KFGF.SV.W.0039.000000T0000Z-070607T1845Z/
CASS ND-
119 PM CDT THU JUN 7 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT
FOR CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

AT 115 PM 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 NEAR  
CASSELTON...OR 22 MILES WEST OF FARGO...MOVING TO THE NORTHEAST AT 
15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  AMENIA BY 135 PM CDT...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT THURSDAY EVENING
FOR NORTHWESTERN MINNESOTA.

LAT...LON 4693 9758 4675 9748 4683 9709 4706 9722

$$

GUST/BARRETT
000 
WWUS53 KFGF 071834
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
133 PM CDT THU JUN 7 2007

NDC017-071843-
/O.CAN.KFGF.SV.W.0039.000000T0000Z-070607T1845Z/
CASS ND-
133 PM CDT THU JUN 7 2007

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

THE THUNDERSTORMS IN CENTRAL CASS COUNTY HAVE WEAKENED AND ARE NO 
LONGER CONSIDERED SEVERE. SO THE WARNING HAS BEEN CANCELLED. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT THURSDAY EVENING
FOR NORTHWESTERN MINNESOTA.

LAT...LON 4693 9758 4675 9748 4683 9709 4706 9722

$$

GUST

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 11:36 PM CDTSevere Thunderstorm WarningFGFRichland26 min
Jun 7, 12:31 AM CDTSevere Thunderstorm WarningFGFGriggs45 min
Jun 7, 2:12 AM CDTSevere Thunderstorm WarningFGFSteele33 min
Jun 7, 4:10 AM CDTWind AdvisoryFGFBarnes, Benson, Cass, Cavalier, Eddy, Grand Forks and 11 more17 hr
Jun 7, 12:41 PM CDTSevere Thunderstorm WarningFGFRichland43 min
Jun 7, 12:56 PM CDTTornado WarningFGFRichland64 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2007Every severe thunderstorm warning in 2007

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.