Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 181, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 12, 2000, 1:55 AM CDT for Pembina County, Walsh County, North Dakota. It was in force for 30 min. 4 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 12, 2000, 1:55 AM CDT (06:55 UTC)
- Expired
- Aug 12, 2000, 2:25 AM CDT
- In force
- 30 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Pembina County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 122 km from the middle of the area, began a volume at 06:57 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 12, 1:55 AM CDT | Thunderstorm Wind | Gilby, ND | Trees were damaged by the wind. |
| Aug 12, 2:00 AM CDT | Thunderstorm Wind 61 E | Grafton, ND | Trees were damaged by the wind. |
| Aug 12, 2:00 AM CDT | Thunderstorm Wind | St Thomas, ND | Trees were blown down west of St. Thomas. |
| Aug 12, 2:05 AM CDT | Thunderstorm Wind | Cavalier, ND | A tree was blown onto a roof. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 11, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 12, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 6.9 hours before the alert went out and 309 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
- 128 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 1778 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 194 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
613 WUUS53 KFGF 120655 SVRFAR NDC035-067-099-120725- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 155 AM CDT SAT AUG 12 2000 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA... PEMBINA COUNTY IN NORTHEAST NORTH DAKOTA... EASTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA... THIS INCLUDES THE CITY OF GRAFTON * UNTIL 225 AM CDT * AT 151 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 37 MILES NORTH OF GRAFTON TO 16 MILES SOUTH OF GRAFTON... MOVEMENT WAS TO THE EAST AT 20 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... PEMBINA AT 200 AM CDT... NOYES AT 205 AM CDT... DRAYTON AT 210 AM CDT... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SATURDAY MORNING FOR EASTERN NORTH DAKOTA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 600 AM CDT SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4902 9767 4804 9783 4802 9720 4901 9714 $$ KENNEDY 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, 9:00 PM CDT, 4 hours 55 minutes earlier.
Area forecast discussion, Aug 11, 9:00 PM CDT, 4 hours 55 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 900 PM FRI AUG 11 2000 SW UPR LVL JET MOVG INTO SW MAN FCST TO MOV INTO WRN ONT BY MORN WITH THE NRN COUNTIES IN THE RRQ. WATER VAPOR LOOP SHOWING DARK BAND FM CA INTO SW MAN AND SPREADING NE. SHORT WV OVR SRN SASK IS REASONABLE. QUITE UNSTABLE ATMOS WITH LIS AS LOW AS -12 OVR N CNTRL ND. SFC BASED CAPES 1500+ J/KG OVR NW COUNTIES ACCORDING TO THE MESO ETA. HOWEVER CINS WERE ALSO FAIRLY HI. ETA MODEL SNDGS SHOW WM AIR ARND 700 HPA WAS CREATING THE HI CINS. 700 HA CAA FCST OVR THE NRN COUNTIES TNGT. BACKING WND PROFILE ENTERING SW MAN AND IS FCST TO SHFT INTO SW ONT BY MORN. BACKING ALSO OCCURS ACRS ND TNGT BUT LAGS THE CAA ACRS SRN MAN LEAVING LOW LVL CONVERGENCE ACRS THE NRN VLY BY MIDN. MESO SCALE ANLYS HAS SFC PRES RISES MOVG INTO SW MAN AND NW ND. GOOD SFC MSTR FLUX CONVERGENCE INDICATED FM NR BIS INTO TOWNER COUNTY AS SFC WNDS HAVE BECM NW IN WRN ND. KMBX VAD WND HAD A LGT NW WND IN THE FIRST 2 THSD FT. KBIS AND KMVX VAD WND HAD A SOUTH WND 30-35KTS BLO 5-6 THSD FT. NNW-SSE AXIS OF SFC MIXING RATIOS OF 16G/KG WAS OVR THE ERN HALF OF ND AND ADJ PARTS OF MN. FAST MOVG TSRA HAS MOVD INTO NW ND AND TSRA HAVE DEVELOPED IN SE MAN JUST N OF THE INTERNATIONAL BDR. SO WL FOCUS ON TSRA MAINLY OVR NRN COUNTIES TNGT. WL CHECK ZONES. .FGF...NONE. HOPPES
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 10:51 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 29 min |
| Aug 12, 12:04 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey | 46 min |
| Aug 12, 12:04 AM CDT | Severe Thunderstorm Warning | FGF | Eddy | 46 min |
| Aug 12, 12:51 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Nelson, Ramsey, Walsh | 59 min |
| Aug 12, 12:51 AM CDT | Severe Thunderstorm Warning | FGF | Eddy | 59 min |
| Aug 12, 1:25 AM CDT | Severe Thunderstorm Warning | FGF | Pembina, Walsh | 30 min |
| Aug 12, 1:25 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 30 min |
| Aug 12, 1:55 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 30 min |
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.