Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 185, NWS Grand Forks, ND

August 13, 2000Cavalier County, Towner County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 13, 2000, 11:27 PM CDT for Cavalier County, Towner County, North Dakota. It was in force for 43 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: Aug 13, 2000, 11:27 PM CDT (04:27 UTC)
Expired: Aug 14, 2000, 12:10 AM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cavalier County, ND, Towner County, ND

What was reported inside it

Time	Report	Where	Remark
Aug 13, 11:50 PM CDT	Hail 0.75	Calvin, ND
Aug 13, 11:50 PM CDT	Thunderstorm Wind	Hansboro, ND	The door on a pole barn was torn off by the strong wind.

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, 4.5 hours before the alert went out and 278 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: 56 J/kg
Mixed-layer CIN: -452 J/kg
Mixed-layer LCL: 2518 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 434 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

408 
WUUS53 KFGF 140428
SVRFAR
NDC019-095-140510-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
1127 PM CDT SUN AUG 13 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA...
  THIS INCLUDES THE CITY OF LANGDON
  NORTHEASTERN TOWNER COUNTY IN NORTHEAST NORTH DAKOTA...

* UNTIL 1210 AM CDT

* AT 1124 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES NORTHWEST OF SARLES...OR ABOUT 42
  MILES NORTHWEST OF LANGDON...MOVEMENT WAS TO THE EAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SARLES AT 1135 PM CDT...
  CALVIN AT 1140 PM CDT...
  HANNAH AT 1150 PM CDT...
  WALES AT 1155 PM CDT...

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

LAT...LON 4912 9928 4887 9937 4869 9837 4904 9838

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 13, 8:56 PM CDT, 2 hours 31 minutes earlier.

Area forecast discussion, Aug 13, 8:56 PM CDT, 2 hours 31 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
845 PM SUN AUG 13 2000

FCST CONCERN...SVR WX CHC LATE TNGT. FCST UPDATE CONSIDERED.

ANALYSIS...SFC LOW PRES CONTINUES TO DEEPEN ALG MT/ND BDR AREA WITH
A WMFNT EVIDENT ON 00Z SFC ANAL JUST WEST OF A MBG-BIS-MOT-YEN LINE.
LOW LVL MOISTURE IS POOLING IN WRN ND AND SEVERAL MODERATE TSTM
CELLS HAVE DEVELOPED IN THE WARM SECTOR ALG A LINE FM BOTTINEAU
THROUGH GARRISON AND DICKENSON. SFC BASED LIS ARE RUNNING IN THE
MINUS 5-6 RANGE IN THIS AREA WITH CAPES IN THE 1000-1500 J/KG RANGE
AND RISING. FURTHER EAST...BROAD AREA OF ACCAS HAS SPREAD ACROSS ERN
ND INTO NW MN WITH NUMEROUS EMBEDDED TCU EVIDENT. ISOLD SHWRS IN
THIS PATCH NOT PRODUCING PCPN AT THE GROUND BUT ARE MOISTENING THE
LOWER LVLS. 88D WIND PROFILES FM KBIS TO KMVX SHOW INCRESING SHEAR
PROFILE WITH 0-6KM SHEAR OVR KMVX AROUND 22M/S INCREASING TO +30M/S
OVR KBIS.

NEAR TERM...LOW LVL MOISTURE EXPECTED TO INCREASE THROUGH THE
EVENING AND OVERNIGHT PERIOD ACROSS ERN ND INTO NW MN...DUE TO LOW
LEVEL INFLOW AND ACCAS/TCU VIRGA. EXPECT SHEAR PROFILE TO INCREASE
AS WELL SO THAT ANY TSTMS HAVE POTENTIAL FOR PROPAGATING ACROS CNTRL
ND AND PRODUCING DAMAGING WINDS AT THE SFC...INTO ERN ND...AS WARM
FRONTAL SURGE DEVELOPS 05-10Z. EXPECT MOSTLY ELEVATED TSTMS TO
PROPAGATE INTO NW MN 10-14Z AS WARM FRONTAL SURGE STALLS ALG THE
RRV. HAVE COORD WITH BIS ON POSSIBLE WATCH BOX IN WRN AND CNTRL ND
AFT 9PM. SPC STILL ANALYZING SITUATION. NEW MODEL CYCLE DATA WILL BE
AVAILABLE IN NEXT HOUR. WILL WAIT FOR SPC DECISIONS BEFORE UPDATE.

.FGF...NONE.
GUST

In the hours before

Special weather statement, Aug 13, 5:50 PM CDT, 5 hours 37 minutes before

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-140000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
550 PM CDT SUN AUG 13 2000

...RISK OF SEVERE THUNDERSTORMS LATE TONIGHT INTO MONDAY MORNING ACROSS
EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA...

SYNOPSIS...SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER
CENTRAL NORTH DAKOTA THIS EVENING AND SPREAD TO THE EAST ACROSS MUCH
OF EASTERN NORTH DAKOTA AND PORTIONS OF NORTHWEST MINNESOTA.

INCREASING SOUTHERLY WINDS AHEAD OF AN INTENSIFYING LOW PRESSURE
SYSTEM IN EASTERN MONTANA...WILL CONTINUE TRANSPORT A MOIST AND UNSTABLE
AIRMASS INTO THE NORTHERN PLAINS THIS EVENING AND OVERNIGHT.

AREA OF CONCERN...RISK OF SEVERE THUNDERSTORMS IS POSSIBLE LATE
TONIGHT INTO MONDAY MORNING ACROSS ALL OF EASTERN NORTH DAKOTA AND
NORTHWEST MINNESOTA...BUT THE GREATEST THREAT WILL EXIST ALONG AND
NORTH OF INTERSTATE 94.

TIME...IN THE DEVILS LAKE AREA AFTER 10PM...TRAVERSING EAST INTO
THE RED RIVER VALLEY AFTER MIDNIGHT AND THE BEMIDJI AND PARK RAPIDS
AREAS IN THE PRE-DAWN HOURS.

HAZARD...MAINLY DAMAGING WINDS ALONG WITH LARGE HAIL.

BERG/BRAZZEL

NNNN

Local storm report, Aug 13, 7:48 PM CDT, 3 hours 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
748 PM CDT SUN AUG 13 2000

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

0300 AM    9 NW GREENBUSH            MN   WIND DAMAGE
08/12/00   ROSEAU                         3 INCH DIAMETER BRANCHES
                                          DOWN

N

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 5:51 AM CDT	Severe Thunderstorm Warning	FGF	Cass	30 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.