Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 113, NWS Grand Forks, ND

July 7, 2000Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 7, 2000, 2:21 AM CDT for Cass County, North Dakota. It was in force for 29 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Jul 7, 2000, 2:21 AM CDT (07:21 UTC)
Expired
Jul 7, 2000, 2:50 AM CDT
In force
29 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 67 km from the middle of the area, began a volume at 07:22 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
Jul 7, 2:30 AM CDTHail 0.75Tower City, ND

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 7.4 hours before the alert went out and 238 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 00:00Z on 2000-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1744 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2000-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.19395878Sfc1 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
1744 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1471 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
275 m²/s²
Significant tornado parameter
0.7
Supercell composite
10.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 070721
SVRFAR
NDC017-070751-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
221 AM CDT FRI JUL 7 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL 250 AM CDT

* AT 212 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES NORTHWEST OF EMBDEN...OR ABOUT 25 MILES
  EAST OF VALLEY CITY...MOVEMENT WAS TO THE EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WHEATLAND AT 225 AM CDT...
  CASSELTON AT 230 AM CDT...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FRIDAY
MORNING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4687 9764 4674 9745 4699 9705 4715 9728

NNNN

06

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 2:49 AM CDTSevere Thunderstorm WarningFGFCass31 min
Jul 7, 4:44 AM CDTSevere Thunderstorm WarningFGFCavalier, Towner31 min
Jul 7, 6:03 AM CDTSevere Thunderstorm WarningFGFRamsey, Walsh32 min
Jul 7, 6:18 AM CDTSevere Thunderstorm WarningFGFEddy32 min
Jul 7, 6:37 AM CDTSevere Thunderstorm WarningFGFWalsh28 min
Jul 7, 6:52 AM CDTSevere Thunderstorm WarningFGFEddy, Nelson28 min
Jul 7, 7:05 AM CDTSevere Thunderstorm WarningFGFBenson30 min
Jul 7, 9:45 AM CDTSevere Thunderstorm WarningFGFNelson30 min
Jul 7, 10:11 AM CDTSevere Thunderstorm WarningFGFGrand Forks29 min
Jul 7, 10:52 AM CDTSevere Thunderstorm WarningFGFNelson, Walsh28 min
Jul 7, 11:20 AM CDTSevere Thunderstorm WarningFGFGriggs, Nelson30 min
Jul 7, 11:28 AM CDTSevere Thunderstorm WarningFGFGrand Forks47 min
Jul 7, 11:43 AM CDTSevere Thunderstorm WarningFGFSteele32 min
Jul 7, 11:52 AM CDTFlash Flood WarningFGFGrand Forks6 hr
Jul 7, 11:52 AM CDTFlash Flood WarningFGFGrand Forks, Nelson6 hr
Jul 7, 12:15 PM CDTSevere Thunderstorm WarningFGFSteele, Traill45 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2000Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.