Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 97, NWS Grand Forks, ND

July 16, 2001Benson County, Eddy County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 16, 2001, 9:18 PM CDT for Benson County, Eddy County, North Dakota. It was in force for 27 min. 2 reports 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 16, 2001, 9:18 PM CDT (02:18 UTC)
Expired: Jul 16, 2001, 9:45 PM CDT
In force: 27 min
Issued by: NWS Grand Forks, ND
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Benson County, ND, Eddy County, ND

What was reported inside it

Time	Report	Where	Remark
Jul 16, 9:30 PM CDT	Hail 0.75	Oberon, ND
Jul 16, 9:40 PM CDT	Thunderstorm Wind	Sheyenne, ND	Branches were blown down.

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

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.3 hours before the alert went out and 169 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: 2231 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1669 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 79 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 170218
SVRFAR

NDC005-027-170245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
918 PM CDT MON JUL 16 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTH CENTRAL BENSON COUNTY IN NORTHEAST NORTH DAKOTA AND
  NORTHWESTERN EDDY COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 945 PM CDT.

* AT 913 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTH OF OBERON...OR ABOUT 23 MILES
  SOUTHWEST OF DEVILS LAKE...MOVEMENT WAS TO THE EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  SHEYENNE AT 930 PM CDT.

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

LAT...LON 4794 9923 4783 9932 4774 9903 4785 9892


$$

14

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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 16, 8:20 PM CDT, 58 minutes earlier.

Area forecast discussion, Jul 16, 8:20 PM CDT, 58 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
820 PM CDT MON JUL 16 2001

WEAK SFC LOW JUST WEST OF BIS AT 00Z...WITH QUASISTATIONARY WARM
FRONT EXTENDING NORTHEAST TO AROUND FGN. DEWPOINTS AROUND 70F ACROSS
ENTIRE FA...WITH BEST SFC MOISTURE FLUX CONVERGENCE ALONG FRONT.
CAPES RUNNING FROM 1500-2500 ACROSS FA AS WELL. ELEVATED CONVECTION
ON NOSE OF 30KT JET CONTINUES TO RIDE INTO NORTHEAST FA. AREA OF
CONCERN WILL BE EXTREME NORTHEAST ND INTO NORTHERN MN OVERNIGHT FOR
FLASH FLOODING CONCERNS. EVEN WITH FFG GUIDANCE OF 1.5-2.5 INCHES
PER HOUR NEEDED FOR FLASH FLOODING...THREE HOUR VALUES AROUND 3
INCHES MAY BE REACHABLE. FEEL BEST CHANCE WILL BE ALONG
QUASISTATIONARY WARMFRONT...WHERE PRECIPITABLE WATERS AROUND 1.70
INCHES. CONVECTION SHOULD DIE DOWN SHORTLY AFTER 06Z FROM VALLEY
EAST AS LARGE SCALE SUBSIDENCE MOVES IN...AND 850MB FLOW TURNS
WESTERLY ALLOWING UNIDIRECTIONAL FLOW. FEEL AREAL THREAT IS TOO
SMALL FOR A FFA THOUGH...SO WILL NOT ISSUE ONE FOR NOW BUT MONITOR
CLOSELY. A FEW SEVERE STORMS POSSIBLE AS WELL UNTIL 03Z...WITH BIGGEST
THREAT FROM BRIEF GUSTY WINDS/LARGE HAIL. FURTHER SOUTH...EXTREMELY
UNSTABLE ENVIRONMENT WITH CAPES TO 3500 ARE PRESENT...BUT SFC
CONVERGENCE IS LIMITED. WILL LEAVE IN A LOW EVENING POP THREAT
HERE...WITH SWOMCD OUT FOR SE ND STATING ANY STORMS WHICH DO DEVELOP
WOULD BECOME RAPIDLY SEVERE.

.FGF...NONE.

KELLENBENZ

In the hours before

Local storm report, Jul 16, 6:29 PM CDT, 2 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
629 PM CDT MON JUL 16 2001

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

0525 PM    GRAND FORKS AFB           ND   .75 INCH HAIL
07/16/01   GRAND FORKS

0525 PM    GRAND FORKS AFB           ND   68 MPH TSTM GUST
07/16/01   GRAND FORKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:40 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	50 min
Jul 17, 4:04 PM CDT	Tornado Warning	FGF	Griggs, Steele	26 min
Jul 17, 4:30 PM CDT	Tornado Warning	FGF	Griggs, Steele	45 min
Jul 17, 4:31 PM CDT	Flash Flood Warning	FGF	Griggs, Steele	4 hr
Jul 17, 4:52 PM CDT	Severe Thunderstorm Warning	FGF	Traill	53 min
Jul 17, 5:16 PM CDT	Tornado Warning	FGF	Traill	44 min
Jul 17, 5:20 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	40 min
Jul 17, 5:33 PM CDT	Severe Thunderstorm Warning	FGF	Cass	42 min
Jul 17, 6:03 PM CDT	Severe Thunderstorm Warning	FGF	Traill	42 min
Jul 17, 6:07 PM CDT	Severe Thunderstorm Warning	FGF	Cass	53 min
Jul 17, 6:11 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	64 min
Jul 17, 6:19 PM CDT	Tornado Warning	FGF	Cass	26 min
Jul 17, 6:48 PM CDT	Tornado Warning	FGF	Richland	42 min
Jul 17, 6:59 PM CDT	Tornado Warning	FGF	Cass	46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.