Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 196, NWS Grand Forks, ND

July 21, 2001Cass County, Ransom County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2001, 4:44 AM CDT for Cass County, Ransom County, North Dakota. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 21, 2001, 4:44 AM CDT (09:44 UTC)
Expired: Jul 21, 2001, 5:30 AM CDT
In force: 46 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Cass County, ND, Ransom County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 93 km from the middle of the area, began a volume at 09:44 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 21, 3:45 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 9.7 hours before the alert went out and 213 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: 2936 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1232 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 210945
SVRFAR

NDC017-073-211030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
444 AM CDT SAT JUL 21 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  CASS COUNTY IN SOUTHEAST NORTH DAKOTA AND 
  RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA.
  INCLUDING THE CITY OF FARGO...

* UNTIL 530 AM CDT.

* AT 439 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING
  FROM 36 MILES NORTH OF FARGO TO 16 MILES NORTHEAST OF FARGO TO 2
  MILES SOUTHEAST OF FARGO TO 26 MILES WEST OF WAHPETON...MOVEMENT
  WAS TO THE EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FARGO AT 445 AM CDT.
  HICKSON AT 445 AM CDT.
  LISBON AT 450 AM CDT.

WINDS UP TO 70 MPH ARE POSSIBLE WITH THIS STORM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT
SATURDAY MORNING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA. A
SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT U5NTIL 900 AM CDT
SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH
DAKOTA.


$$
DJK/RD

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 Jul 21, 3:23 AM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Jul 21, 3:23 AM CDT, 1 hour 21 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
315 AM SAT JUL 21 2001

DISCUSSION IS LATE AND BRIEF DUE TO DERECHO MOVING THROUGH THE CWA
AT THIS TIME.

.CURRENT/MODEL DISCUSSION...DERECHO CURRENTLY MOVING THROUGH THE
CWFA WITH NUMEROUS WARNINGS. LIKE THE ETA MODEL FOR THE DETAILS.

.SHORT TERM...DERECHO WILL CONTINUE TO PROPAGATE TO THE EAST THROUGH
THE EARLY MORNING. AFTER THIS MOVES THROUGH...THUNDERSTORMS WILL END
ACROSS THE CWFA THIS MORNING...THEN RELSULT IN PARTLY CLOUDY SKIES
FOR THE REMAINDER OF THE DAY. COULD BE SOME WIDELY SCATTERED
REDEVELOPMENT IN THE AFTERNOON...ESPECIALLY TOWARDS DEVILS LAKE.

.LONG TERM...A SIMILAR SITUATION SETTING UP FOR TONIGHT AS PREVIOUS
NIGHT. WITH FAVORABLE MID LEVEL FLOW WOULD EXPECT ANOTHER BOW ECHO
TO RUN ACROSS THE CWA. THINGS MAY BEGIN TO SETTLE DOWN AFTER SUNDAY
AS THE PATTERN TAKES ON A MORE BENIGN PATTERN. WILL NOT GO AHEAD AND
ISSUE A FLASH FLOOD WATCH AT THIS TIME...WILL LET NEXT SHIFT
EVALUATE THIS SITUATION LATER TODAY.

.FGF...NONE.

BRAZZELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 12:43 AM CDT	Severe Thunderstorm Warning	FGF	Benson	47 min
Jul 21, 1:30 AM CDT	Severe Thunderstorm Warning	FGF	Benson	30 min
Jul 21, 1:57 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy	63 min
Jul 21, 2:37 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Griggs, Nelson	63 min
Jul 21, 2:52 AM CDT	Flash Flood Warning	FGF	Benson, Eddy, Ramsey	4 hr
Jul 21, 2:56 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Eddy	49 min
Jul 21, 2:59 AM CDT	Severe Thunderstorm Warning	FGF	Ramsey	61 min
Jul 21, 3:04 AM CDT	Severe Thunderstorm Warning	FGF	Steele	56 min
Jul 21, 3:14 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	61 min
Jul 21, 3:41 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Ransom, Steele	64 min
Jul 21, 3:41 AM CDT	Severe Thunderstorm Warning	FGF	Traill	64 min
Jul 21, 3:41 AM CDT	Severe Thunderstorm Warning	FGF	Nelson	64 min
Jul 21, 4:17 AM CDT	Severe Thunderstorm Warning	FGF	Richland	58 min
Jul 21, 5:16 AM CDT	Severe Thunderstorm Warning	FGF	Richland	44 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2001 Every severe thunderstorm warning in 2001

Sources

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