Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 173, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 11, 2000, 4:35 AM CDT for Towner County, North Dakota. It was in force for 45 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 11, 2000, 4:35 AM CDT (09:35 UTC)
- Expired
- Aug 11, 2000, 5:20 AM CDT
- In force
- 45 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Towner County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 4:40 AM CDT | Hail 0.75 | Cando, ND | |
| Aug 11, 4:50 AM CDT | Hail 0.75 | Bisbee, 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 9.6 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.
- Mixed-layer CAPE
- 2893 J/kg
- Mixed-layer CIN
- -139 J/kg
- Mixed-layer LCL
- 1765 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 110935 SVRFAR NDC095-111020- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 435 AM CDT FRI AUG 11 2000 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... TOWNER COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 520 AM CDT * AT 431 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF CONSIDINE...OR ABOUT 33 MILES NORTHWEST OF DEVILS LAKE...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... BISBEE AT 445 AM CDT... CONSIDINE AT 450 AM CDT... ARNDT AT 500 AM CDT... EGELAND AT 515 AM CDT... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4857 9948 4841 9942 4857 9899 4893 9903 $$ DJK 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 11, 2:39 AM CDT, 1 hour 56 minutes earlier.
Area forecast discussion, Aug 11, 2:39 AM CDT, 1 hour 56 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 240 AM FRI AUG 11 2000 ...CHALLENGE WILL BE TEMPS TODAY AND TSRA THREAT TONIGHT INTO SAT... .CURRENT OVERVIEW... ONGOING MCS ACROSS NORTH CENTRAL ND LIFTING NORTHEAST INTO CANADA...WITH SOME MID LEVEL DEBRIS SCRAPING WESTERN FA. SURFACE WARMFRONT EXTENDS FROM SURFACE LOW IN WESTERN MT...FROM ISN TO JUST NORTH OF YWG. WATER VAPOR NICELY DEPICTS SHORTWAVE ENTERING NORTHWEST ND...WITH ETA HAVING THE BEST HANDLE ON THIS FEATURE. .SHORT TERM... BEST SFC-850 MOISTURE CONVERGENCE AND FORCING REMAIN IN NORTH CENTRAL ND AND MOVE INTO CANADA BY 12Z. GOOD ELEVATED INSTABILITY AND INCREASING H850 LLJ MOVE INTO WESTERN ZONES BY FRI MORNING. FEEL TSRA COULD BRUSH NW FA BY EARLY MORNING...THEN MOVE INTO CANADA IN NORTHEAST H85-5 STEERING FLOW. NOT TOO CONFIDENT WITH TSRA THREAT...BUT MAY MENTION WIDELY SCATTERED EARLY MORNING TSRA FROM DVL-HCO-ROX NORTHWARD AFTER OBSERVING CONVECTIVE TRENDS. WARM AIR ADVECTION INCREASES TODAY...ALONG WITH H850 TEMPS FROM 24-28 FROM NE-SW. THIS IS AN INCREASE OF +4C FROM YESTERDAY. SFC GRADIENT ALSO TIGHTENS IN WARM SECTOR...WITH 40KT LLJ AND MODEL SOUNDINGS INDICATING ADIABATIC SOUNDINGS. THUS A WINDY AND HOT DAY WILL RESULT AS TEMPS APPROACH RECORDS IN GFK (96) AND FAR (96). FEEL WIND ADVISORY NOT WARRANTED WITH WARM AIR ADVECTION PATTERN NOT CONDUCIVE FOR FULL MOMENTUM TRANSPORT. .LONG TERM... SURFACE FRONT WILL MOVE INTO NW DURING THE EVENING...THEN PROGRESS INTO NW MN BY MORNING. STRONG SFC MOISTURE CONVERGENCE AND INSTABILITY SHOULD BE SUFFICIENT ENOUGH TO BREAK CAP FOR TSRA DEVELOPMENT. POTENTIAL EXISTS FOR A FEW SEVERE STORMS...WITH 45KT LLJ AND STRONG LOW LEVEL Q VECTOR CONVERGENCE NEAR FRONT. CONVECTION MAY NOT REACH FAR SE ZONES UNTIL EARLY SAT MORNING...WITH UPPER LEVEL FLOW NEARLY PARALLEL TO SURFACE FRONT UNTIL 12Z. WILL HAVE TO LINGER TSRA THREAT IN ALL BUT NW ZONES EARLY SAT...BEFORE STRONG SUBSIDENCE AND CAA MOVE IN. TSRA COULD PERSIST INTO EARLY AFTERNOON IN SE MN...AS FRONT MAY TEND TO HANG UP A BIT LONGER HERE. TEMPS ON SAT WILL BE NEAR 80 TO THE MIDDLE 80S FROM NORTH TO SOUTH...AS 850 TEMPS COOL AND BREEZY WEST/NORTHWEST FLOW DEVELOPS. .EXTENDED... PATTERN TRANSITION TO ZONAL FLO ON SUNDAY WITH WEAK HI PRES CENTERED OVER CENTRAL ND BY 12Z. MODELS IN DISARRAY ON PLACEMENT/STRENGTH OF PARTICULAR WAVES IN THIS FLO...BUT 00Z AVN AND CANADIAN KEEP H85 BOUNDARY SOUTH OF CWA THRU 00Z MONDAY WITH H85 TD/S BLO 10C. SLOW DEVELOPMENT OF LEE SIDE TROF PER CANADIAN AND NOGAPS WITH BOUNDARY STILL IN ERN MT BY 00Z MONDAY SHUD ALLOW DAYLIGHT HOURS TO SQUEAK OUT DRY WITH MRF STILL SHOWING POSITIVE SHOWALTERS IN ERN ND. WL PUSH BACK TSRA THREAT TIL SUN NGT AND CONTINUE MENTION MON WITH BEST CHANCE APPARENTLY IN SRN CWA. REST OF PERIOD REMAINS UNSETTLED WITH MAIN BELT OF WESTERLIES HANGING ALONG INTL BORDER AND EMBEDDED JETLETS SURE TO SPARK TSRA COMPLEXES...WITH BEST CHANCES PROBABLY IN NRN CWA INITIALLY BEFORE SAGGING SOUTH BY WEEK/S END. .FGF...NONE. KELLENBENZ/SOROKA
Nearby
Severe Thunderstorm Warnings in North Dakota, 2000Every 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.