Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 190, NWS Grand Forks, ND

August 14, 2000Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 14, 2000, 5:51 AM CDT for Cass County, North Dakota. It was in force for 30 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: Aug 14, 2000, 5:51 AM CDT (10:51 UTC)
Expired: Aug 14, 2000, 6:21 AM CDT
In force: 30 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), 90 km from the middle of the area, began a volume at 10:51 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
Aug 14, 6:10 AM CDT	Hail 0.75	Davenport, 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, 10.9 hours before the alert went out and 231 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2484 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 190 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 141058
SVRFAR
NDC017-141115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
551 AM CDT MON AUG 14 2000...CORRECTED HEADER...

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL 621 AM CDT

* AT 550 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES EAST OF DAVENPORT...OR ABOUT 14 MILES
  SOUTHWEST OF FARGO...MOVEMENT WAS TO THE EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HORACE AT 559 AM CDT...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUC^E
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4673 9719 4660 9701 4676 9682 4689 9693

NNNN

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 Aug 14, 3:14 AM CDT, 2 hours 37 minutes earlier.

Area forecast discussion, Aug 14, 3:14 AM CDT, 2 hours 37 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
310 AM MON AUG 14 2000

...MAIN CONCERNS THIS PACKAGE CENTER ON SEVERE CONVECTIVE THREAT
DURING FIRST PERIOD...

.CURRENT OBSERVATIONAL OVERVIEW...
07Z MSAS DATA SETS CONFIRMED LOW PRESSURE VICINITY OF EXTREME
SOUTHEAST MONTANA WITH INVERTED TROUGH AXIS EXTENDING NORTHWARD INTO
SOUTHERN SASK PROVINCE. STRONGEST SURFACE BASED INSTABILITY AND
MOISTURE FLUX CONVERGENCE ATTM VICINITY OF WESTERN NODAK I.E.
VICINITY OF DEVELOPING CONVECTIVE COMPLEX. LATEST KMVX VAD WIND
PROFILE DEPICTED RATHER POTENT LOW-LEVEL 40 KTS JUST OFF THE SURFACE
WITH GOOD VEERING WITH HEIGHT NOTED.

.SHORT TERM...
HERE WE GO AGAIN...PER ADVERTISED. STRONG CORE OF UPPER LEVEL
WESTERLIES WITH EMBEDDED PIECES OF SHORTWAVE ENERGY STREAKING EAST
OVER THE TOP OF CENTRAL PLAINS 5H RIDGE RESULTING IN SEVERE
CONVECTION ACROSS NODAK. EXTRAPOLATION OF SURFACE BASED TROUGH AND
INSTABILITY PARAMETERS SUGGESTS SEVERE CONVECTIVE THREAT SHOULD
SLOWLY SHIFT EAST OF THE VALLEY BY AFTERNOON INTO MINNESOTA...REFER
TO SPC DAY ONE OUTLOOK FOR FURTHER DETAILS. BASED ON ABOVE SCENARIO
WILL END CONVECTIVE THREAT FROM WEST TO EAST AS DAY WEARS ON.

.LONG TERM...
IN WAKE OF TROUGH EXPECT SOUTHERN SASK PROVINE HIGH TO RIDGE
SOUTHEAST INTO REGION TONIGHT AND TUESDAY WITH THE RESULTANT BEING
TEMPERATURE AND HUMIDITY REDUCTION. NO CHANGES PLANNED TO EXTENDED
ATTM.

.FGF...NONE.

BERG

In the hours before

Local storm report, Aug 14, 2:00 AM CDT, 3 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
200 AM CDT MON AUG 14 2000

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1150 AM    10 N CALVIN               ND   .75 INCH HAIL
08/13/00   CAVALIER

1253 AM    2 SE MILTON               ND   TORNADO
08/14/00   CAVALIER                       COUNTY SHERIFF REPORTED
                                          BRIEF TOUCHDOWN WITH BARN
                                          DESTROYED AND ROOF TORN
                                          OFF OF SHOP

N

Special weather statement, Aug 14, 4:30 AM CDT, 1 hour 21 minutes before

MNZ004-005-007-NDZ006>008-014>016-024-026>029-054-141130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
430 AM CDT MON AUG 14 2000

...SEVERE THUNDERSTORM WATCH NUMBER 684 HAS BEEN CANCELLED FOR
PORTIONS OF EASTERN NORTH DAKOTA...

THE THREAT FOR SEVERE WEATHER HAS DIMINISHED ACROSS THE AREA AND THE
WATCH HAS BEEN CANCELLED.
N

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 11:27 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Towner	43 min
Aug 14, 1:14 AM CDT	Tornado Warning	FGF	Pembina, Walsh	31 min
Aug 14, 3:40 AM CDT	Severe Thunderstorm Warning	FGF	Barnes	45 min
Aug 14, 4:22 AM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	43 min
Aug 14, 4:24 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	46 min
Aug 14, 5:08 AM CDT	Severe Thunderstorm Warning	FGF	Cass	32 min
Aug 14, 7:16 AM CDT	Severe Thunderstorm Warning	FGF	Griggs	29 min
Aug 14, 7:58 AM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	32 min
Aug 14, 9:13 AM CDT	Severe Thunderstorm Warning	FGF	Traill	32 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2000 Every 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.