Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 145, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 15, 2000, 6:48 PM CDT for Towner County, North Dakota. It was in force for 42 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 15, 2000, 6:48 PM CDT (23:48 UTC)
- Expired
- Jul 15, 2000, 7:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Towner County, ND
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 15, 4:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.8 hours before the alert went out and 239 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
- 1025 J/kg
- Mixed-layer CIN
- -492 J/kg
- Mixed-layer LCL
- 1382 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 15, 2:15 PM CDT, 4 hours 33 minutes earlier.
Area forecast discussion, Jul 15, 2:15 PM CDT, 4 hours 33 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 215 PM CDT SAT JUL 15 2000 FCST CONCERNS MAINLY DEAL WITH SVR THREAT THIS EVENING. .CURRENT... 19Z SFC FRONT ENTERING NW ND ATTM...WITH LINE OF CU WITH FRONT. O/W TROUGH EXTENDS SOUTH THRU FAR WRN ND INTO SFC LOW IN NE SD. AGREE WITH SWOMCD THAT TSRA INITATION WILL BEGIN IN NW ND WHERE CAP IS WEAKEST AND MSAS SHOWS -10C SFC LI AND SFC MOISTURE POOLING WITH 70+ DEW PTS MOT/DIK AREAS. DESPITE BEING TOO COOL WITH 85H TEMP INITIALIZATION...PREFER THE MESO ETA MODEL THRU 60HRS. .SHORT TERM... EXPECT TSRA WILL FORM IN NW ND THIS AFTN ALONG FRONT...THEN DEVELOP SOUTH WITH TIME AS IT MOVES EAST. WILL HAVE TO WATCH MID CLDS NOW AROUND BIS/MOT FOR DEVELOPMENT TOO...BUT THIS AREA UNDER WARMER 70H TEMPS. 70H THERMAL RIDGE OVER THE VALLEY AT 00Z THEN TEMPS COOL BY 03Z. MEANWHILE...85H THERMAL RIDGE PEAKS OVER THE VALLEY AT 03Z. THUS EXPECT LINE OF TSRA TO MOVE INTO THE WRN CWFA NR 00Z AND THEN INTO THE VALLEY THE 02Z-05Z TIME FRAME AS WARMING IN LOW LEVELS COINCIDES WITH COOLING AT MID LEVELS. FREEZING/WET BULB ZERO LEVELS REMAIN HIGH (15/13KFT RESPECTIVELY). CONVECTION WILL BE SFC BASED...SO GUSTY WINDS AND ISOLD LARGE HAIL WILL BE THE MAIN THREAT. LINE OF TSRA WILL WEAKEN OVERNIGHT AS IT MOVES INTO MN. .LONGER TERM... FRONT TO CLEAR ERN ZONES EARLY SUNDAY...FOLLOWED BY SUBSIDENCE AND DRYING WESTERLY WINDS. RH PROFILES SUGGEST A MOSTLY SUNNY DAY ON SUNDAY WITH NEARLY ADIABATIC SOUNDING RESULTING IN BREEZY CONDITIONS ND ZONES. HIGHS 75-80 NORTH TO 80-85 SOUTH. SECONDARY FRONT WILL DROP SOUTH THRU CWFA SUNDAY NIGHT FOLLOWED BY MUCH COOLER AIR ON MONDAY AS 85H TEMPS DROP INTO THE SINGLE DIGITS. MOISTING AND COOLING IN THE 1000-85H LAYER WILL RESULT IN STRATOCU MONDAY SO WILL GO PTLY SUNNY. MAV MOS MAY BE A TAD COOL ON MONDAY...AND WILL LEAN TOWARD FWC/FAN. .EXTENDED...LONG RANGE MODELS SIMILAR...BUT HAVE SOME MINOR TIMING DIFFERENCES. MRF...UKMET AND CANADIAN SIMILAR WITH ECMWF A TAD FASTER. SFC HIGH MOVES THROUGH CWFA ON TUE...WITH A SFC LOW APPROACHING BY 12Z WED. SFC LOW MOVES THROUGH ON WED AND IS QUICKLY REPLACED WITH ANOTHER HIGH PRESSURE SYSTEM BY 12Z THU. CONSEQUENTLY... MOVED PCPN OUT OF THU FORECAST INTO WED FORECAST. SFC HIGH DOMINATES THROUGH REMAINDER OF WORK WEEK. NEXT SFC LOW PRESSURE SYSTEM ORGANIZES IN ROCKIES AND APPROACHES CWFA LATE ON SAT...SO WILL KEEP PCPN OUT OF REMAINDER OF EXTENDED FORECAST AT THIS TIME. AS FAR AS TEMPS...MRF SFC TEMPS A LITTLE COOLER THAN FMR GUIDANCE...WITH COOLEST TEMPS AT THE START OF EXTENDED FORECAST PERIOD...AND SLOWLY MODERATING TEMPS THROUGH REMAINDER OF EXTENDED FORECAST. THEREFORE...ONLY NEEDED MAKE MINOR CHANGES TO CURRENT TEMP FORECAST. .FGF...NONE RIDDLE/NG
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; the sounding from the Mesonet's radiosonde archive.