Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 74, NWS Grand Forks, ND

June 19, 2000Cass County, North Dakota; Clay County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 19, 2000, 10:21 PM CDT for Cass County, North Dakota; Clay County, Minnesota. 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: Jun 19, 2000, 10:21 PM CDT (03:21 UTC)
Expired: Jun 19, 2000, 10:50 PM CDT
In force: 29 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), 90 km from the middle of the area, began a volume at 03:22 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

Time	Report	Where	Remark
Jun 19, 10:30 PM CDT	Hail 0.75	Horace, 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, 3.4 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-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: 609 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 176 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

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

588 
WUUS53 KFGF 200322
SVRFAR
MNC027-NDC017-200350-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
1021 PM CDT MON JUN 19 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CLAY COUNTY IN NORTHWEST MINNESOTA
  SOUTHEASTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 1050 PM CDT

* AT 1017 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTH OF HORACE...OR ABOUT 12 MILES
  SOUTHWEST OF FARGO...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RUSTAD AT 1025 PM CDT
  SABIN AT 1030 PM CDT
  BAKER AT 1045 PM CDT

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

LAT...LON 4678 9717 4666 9703 4667 9653 4695 9660

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:17 PM CDT	Tornado Warning	FGF	Cass	28 min
Jun 19, 7:54 PM CDT	Flash Flood Warning	FGF	Steele, Traill	3 hr
Jun 19, 7:58 PM CDT	Flash Flood Warning	FGF	Cass	3 hr
Jun 19, 10:02 PM CDT	Flash Flood Warning	FGF	Ransom, Richland	4 hr
Jun 19, 10:57 PM CDT	Flash Flood Warning	FGF	Cass, Traill	5 hr
Jun 20, 1:28 AM CDT	Flash Flood Warning	FGF	Grand Forks	3 hr
Jun 20, 1:59 AM CDT	Flash Flood Warning	FGF	Ransom, Richland	2 hr
Jun 19, 7:36 PM CDT	Tornado Warning	FGF	Clay	29 min
Jun 19, 8:03 PM CDT	Tornado Warning	FGF	Clay	32 min
Jun 20, 12:16 AM CDT	Flash Flood Warning	FGF	Norman	4 hr
Jun 20, 1:44 AM CDT	Flash Flood Warning	FGF	Mahnomen, Pennington, Polk, Red Lake	2 hr

Nearby

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