Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 165, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 4, 2000, 10:24 AM CDT for Richland County, North Dakota. It was in force for 31 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
- Aug 4, 2000, 10:24 AM CDT (15:24 UTC)
- Expired
- Aug 4, 2000, 10:55 AM CDT
- In force
- 31 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Richland County, ND
The radar
The Aberdeen radar (KABR), 146 km from the middle of the area, began a volume at 15:23 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 |
|---|---|---|---|
| Aug 4, 10:30 AM CDT | Hail 0.88 | Hankinson, 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 12:00Z, 3.4 hours before the alert went out and 179 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
- 1653 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 861 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.7
The text
As transmitted, in the capitals the NWS used until 2016.
854 WUUS53 KFGF 041525 SVRFAR NDC077-041555- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 1024 AM CDT FRI AUG 4 2000 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 1055 AM CDT * AT 1021 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES WEST OF LAMARS...OR ABOUT 24 MILES SOUTH OF WAHPETON...MOVEMENT WAS TO THE EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LAMARS AT 1030 AM CDT... BLACKMER AT 1040 AM CDT... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4604 9690 4586 9687 4587 9633 4600 9641 NNNN .END DR
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 4, 2:55 AM CDT, 7 hours 29 minutes earlier.
Area forecast discussion, Aug 4, 2:55 AM CDT, 7 hours 29 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 255 AM CDT FRI AUG 4 2000 FORECAST CHALLENGE THROUGH PERIOD MAINLY CONCERNS TSRA CHANCES AND TEMPS. MODELS DIFFER MAINLY ON TIMING OF UPCOMING SFC BOUNDARY. ETA MIDDLE OF THE ROAD BETWEEN NGM AND SLOWER AVN. CONSIDERING PAST PERFORMANCE WILL FOLLOW ETA. IN THE NEAR TERM WILL MONITOR ISOLD BAND OF ELEVATED CONVECTION ALONG SE ND/NE SD BORDER AREA ASSOCIATED WITH H8 MOIST CONVERGENCE FROM RUC ANAL. MAY NEED TO SPLIT FAR SE COUNTIES FOR EARLY AM SHRA/TSRA MENTION. OTWS LEE TROUGH AND ASSOCIATED LOW TO BECOME BETTER ORGANIZED TODAY WITH APPROACH OF S/W ENERGY AND ENTRANCE REGION OF UPPER JET. AS IT DOES INCREASING SOUTHERLY FLOW WILL ADVECT LOW LEVEL MOISTURE NORTHWARD WHICH IS UNDERESTIMATED BY ALL MODELS. MAIN LOW LEVEL CONVERGENCE AND STEEPEST LAPSE RATES SUGGEST PRIMARY FOCUS FOR CONVECTION INITIATION WILL BE OVR EASTERN MONTANA/WESTERN DAKOTAS THIS AFTERNOON. OF CONCERN IS THAT ETA DEVELOPS E-W ORIENTED WARM FRONT OVR NORTHERN COUNTIES FROM SFC LOW OVR NE MT. WITH AFTERNOON SOLAR AND INCREASED LOW LEVEL MOIST AIRMASS BECOMES MODERATELY UNSTABLE WITH LI'S TO -7 AND CAPES APPROACHING 2000 J/KG. WITH ONLY ETA INDICATING THIS FEATURE AM NOT CONVINCED ENOUGH TO FLIP-FLOP AND PUT POPS BACK INTO FORECAST FOR THIS AFTERNOON BUT BEARS WATCHING. WITH WAA AND AVAILABLE RH AOB H8 FROM 00Z UA ANALYSIS WILL LIKELY SEE SCT-BKN MID CLOUD DEVELOPMENT AS WELL AS SOME CONVECTIVE DEBRIS FROM SASK STORMS. DEGREE OF CLOUD COVER WILL HAVE SOME BEARING ON TEMPS HOWEVER FOR NOW WILL LEAN TOWARDS SLIGHTLY COOLER FWC NUMBERS ALTHOUGH DIF NOT GREAT. CONVECTIVE THREAT TO CONTINUE OVERNIGHT AS 30-40KT H8 LOW LEVEL JET KICKS IN AND H8 THETA-E RIDGE SHIFTS EAST OVR FA WITH COLD FRONT REMAINING WEST OF FA. PWATS INCREASE TO 1.5 INCH OVERNIGHT AND IF E-W BOUNDARY PANS OUT COULD BE SOME AREAS OF HEAVY RAIN. TEMPS WILL REMAIN MILD OVERNIGHT WITH REGION REMAINING IN WARM SECTOR. COLD FRONT MAKES SLOW PROGRESS ACROSS FA ON SATURDAY. NEXT WAVE ENTERS NORTHERN FA TOWARDS EVENING AND WITH AIRMASS REMAINING UNSTABLE WILL MAINTAIN POPS. ATTM APPEARS EASTERN HALF OF FA FAVORED AREA FOR ADDNL CONVECTION FROM FRONTAL POSIT AND WILL WARRANT HIGHEST POPS. H8 COOLING INITIALLY NOT ALL THAT IMPRESSIVE UNTIL SAT NIGHT/SUNDAY TIMEFRAME. .FGF...NONE VOELKER
In the hours before
Special weather statement, Aug 4, 6:40 AM CDT, 3 hours 44 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-041400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 640 AM CDT FRI AUG 4 2000 ...SEVERE THUNDERSTORMS POSSIBLE ACROSS PORTIONS OF EASTERN NORTH DAKOTA...NORTHWEST AND WEST CENTRAL MINNESOTA TONIGHT... SYNOPSIS...AN AREA OF LOW PRESSURE WILL STRENGTHEN OVER THE WESTERN HIGH PLAINS TODAY. AS IT DOES...AN INCREASING SOUTHERLY AIRFLOW WILL TRANSPORT MOIST AND UNSTABLE AIR NORTHWARD INTO THE REGION. LATE THIS AFTERNOON THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE WESTERN DAKOTAS AND TRACK EAST. THESE STORMS MAY REACH EASTERN NORTH DAKOTA LATER THIS EVENING. SOME OF THESE STORMS MAY REACH SEVERE LIMITS. AREA OF CONCERN...A RISK OF SEVERE WEATHER IS FORECAST WEST OF A LINE FROM ROSEAU TO WAHPETON. TIME...START AFTER 8 PM AND DIMINISH AFTER 2 AM. TYPE OF HAZARD...MAINLY LARGE HAIL AND "DAMAGING WINDS. LOCALLY HEAVY RAIN IS ALSO POSSIBLE. VOELKER NNNN
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; radar from the NEXRAD Level II archive.