Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 114, NWS Grand Forks, ND

July 7, 2000Cass County, North Dakota; Clay County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 7, 2000, 2:49 AM CDT for Cass County, North Dakota; Clay County, Minnesota. It was in force for 31 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, 2:49 AM CDT (07:49 UTC)
Expired
Jul 7, 2000, 3:20 AM CDT
In force
31 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Clay County, MN, Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 77 km from the middle of the area, began a volume at 07:52 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, 3:00 AM CDTHail 0.75Durbin, 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, 7.8 hours before the alert went out and 240 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 070749
SVRFAR
MNC027-NDC017-070819-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
249 AM CDT FRI JUL 7 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL CLAY COUNTY IN NORTHWEST MINNESOTA
  SOUTHERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA
  THIS INCLUDES THE CITY OF FARGO

* UNTIL 320 AM CDT

* AT 247 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTH OF CASSELTON...OR ABOUT 19 MILES
  WEST OF FARGO...MOVEMENT WAS TO THE EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DURBIN AT 255 AM CDT...
  MAPLETON AT 300 AM CDT...
  FARGO AT 315 AM CDT...
  MOORHEAD AT 320 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 4694 9733 4676 9735 4670 9669 4693 9666

NNNN
.END
06

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 6, 10:45 PM CDT, 4 hours 4 minutes earlier.

Area forecast discussion, Jul 6, 10:45 PM CDT, 4 hours 4 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
930 PM CDT THU JUL 6 2000

FORECAST PROBLEM FOR TONIGHT IS PCPN. LATEST VIS SATELLITE IMAGERY
SHOWS CI STARTING TO MOVE INTO E ND FROM W ND WITH REMINANT SC DECK
THINNING OVER MN SIDE OF CWFA. KMVX HAS ISOLD TSRA FIRING ALONG W
EDGE OF CWFA IN TOR WATCH AREA...BUT TSRA STILL DISSIPATING AS MOVE
FARTHER E INTO MORE STABLE AND DRIER ENVIRONMENT. LATEST MSAS SFC
PRESSURE ANALYSIS HAS LOW ALONG W SD/WY/MT BORDER AREA WITH INVERTED
TROF ALONG MT/ND BORDER. WHEN COMPARING CURRENT MSAS SFC PRESSURE
PLOT TO MODELS...ETA MATCHES BEST...SO STUCK WITH ETA FOR FOR
FORECAST. LOW CONTINUES EASTWARD TRACK OVERNIGHT...KEEPING CWFA IN
WARM SECTOR WITH LI'S HOLDING IN -5 TO -10 RANGE...30-40 KT LLJ
KICKING IN...AND PW'S FROM 1-2 INCHES. WITH THIS IN MIND...EXPECT
POTENTIAL FOR SVR WITH HVY RAIN TO CONTINUE THROUGH THE NIGHT. WITH
THE CAP WEAKEST IN THE NE PART OF ND...HIGHEST POTENTIAL FOR SVR IN
THIS LOCATION. COORD WITH SPC TO LET TOR EXPIRE AND REPLACE WITH SVR
FOR NE ND AND EXTREME NW MN. WITH HIGH PW'S VALUES CONTINUING
THROUGH OVERNIGHT INTO FRI AND EXPECTED MCS DEVELOPMENT...WILL MATCH
SVR AREA WITH FFA FOR OVERNIGHT AS WELL. THANKS TO BIS FOR COORD.

.FGF...SVR #547 AND FFA NE ND AND EXTREME NW MN

NG

b

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 2:21 AM CDTSevere Thunderstorm WarningFGFCass29 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
Jul 7, 10:26 AM CDTSevere Thunderstorm WarningFGFBeltrami29 min
Jul 7, 11:06 AM CDTSevere Thunderstorm WarningFGFPolk29 min
Jul 7, 11:35 AM CDTSevere Thunderstorm WarningFGFPennington, Red Lake45 min
Jul 7, 12:19 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Pennington31 min
Jul 7, 12:30 PM CDTFlash Flood WarningFGFPennington, Polk, Red Lake4 hr
Jul 7, 12:51 PM CDTSevere Thunderstorm WarningFGFPolk29 min
Jul 7, 1:19 PM CDTSevere Thunderstorm WarningFGFPolk46 min
Jul 7, 5:23 PM CDTSevere Thunderstorm WarningFGFWilkin32 min
Jul 7, 5:32 PM CDTSevere Thunderstorm WarningFGFOtter Tail43 min
Jul 7, 6:10 PM CDTSevere Thunderstorm WarningFGFGrant30 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2000Severe Thunderstorm Warnings in Minnesota, 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.