Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 73, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 1999, 6:39 AM CDT for Pembina County, North Dakota. It was in force for 31 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
- Jun 9, 1999, 6:39 AM CDT (11:39 UTC)
- Expired
- Jun 9, 1999, 7:10 AM CDT
- In force
- 31 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Pembina County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 139 km from the middle of the area, began a volume at 11:43 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 9, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 11.7 hours before the alert went out and 313 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
- 97 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1622 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 091138 SVRFAR NDC067-091210- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 639 AM CDT WED JUN 9 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN PEMBINA COUNTY IN NORTHEASTERN NORTH DAKOTA * UNTIL 710 AM CDT * AT 636 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS 27 MILES NORTHEAST OF LANGDON OR 4 MILES NORTHEAST OF WALHALLA... MOVING NORTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORMS WILL REMAIN IN RURAL AREAS DAMAGING WIND...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN\ A REINFORCED BUILDING IMMEDIATELY. GUST
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 Jun 9, 2:45 AM CDT, 3 hours 54 minutes earlier.
Area forecast discussion, Jun 9, 2:45 AM CDT, 3 hours 54 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 245 AM CDT WED JUN 09 1999 STRONG/SVR CONVECTION CONTINUING ACROSS FA ALONG EASTWARD MOVING COLD FRONT AND DOWNSTREAM WITH STRONG INSTABILITY...HIGH CAPE AND 40 TO 50KT LLJ. MODELS IN A LITTLE BETTER AGREEMENT THIS RUN. CONSIDERING PAST HISTORY WILL CONTINUE TO LEAN TOWARDS THE ETA. CURRENTLY COLD FRONT PUSHING INTO WESTERN CWA. FRONT CROSSES THE RED RIVER INTO WESTERN MN AROUND 18Z AND EVENTUALLY THROUGH EASTERN FA AROUND 03Z. ASSOCIATED BOUNDARY LAYER MOIST CONVERGENCE...H8 THETA-E RIDGE...MOIST TRANSPORT ALSO SHIFTS EAST. BY LATE AFTERNOON EASTERN THIRD OF MY FA REMAINS EAST OF COLD FRONT AND COULD STILL BE UNDER THE GUN FOR STRONG TSRA IN AGREEMENT WITH SPC OUTLOOK ALTHOUGH GREATEST INSTABILITY/CAPES WILL BE SOUTH OF FA. ELSEWHERE BEHIND COLD FRONT GOOD SUBS AND DRYING NOTED FROM AREA TIME SECTIONS WHICH CONTINUES THROUGH PERIOD. MID LEVEL TROUGH LIFTS NORTHEAST REPLACED BY MORE ZONAL FLOW. WK CAA DURING DAY WITH ANOTHER SHOT OF CAA OVERNIGHT WITH PSBL SECONDARY COLD FRONT ACROSS MAINLY NORTHERN AREAS. COOLER TEMPS BEHIND CFP REFLECTED WELL BY BOTH FAN/FW C GUIDANCE AND GENERALLY FOLLOWED. .FGF...SVR TSTM WATCH ALL OF CWFA UNTIL 7 AM. VOELKER
In the hours before
Special weather statement, Jun 9, 5:23 AM CDT, 1 hour 16 minutes before
MNZ001-091040- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 523 AM CDT WED JUN 9 1999 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN POLK COUNTY HAS BEEN CANCELLED... AT 521 AM CDT...DOPPLER RADAR INDICATED THAT THE THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED BELOW SEVERE LIMITS. THE SEVERE THUNDERSTORM WARNING FOR WESTERN POLK COUNTY HAS THEREFORE BEEN CANCELLED. TURNER
Special weather statement, Jun 9, 5:56 AM CDT, 43 minutes before
MNZ007-091115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 556 AM CDT WED JUN 9 1999 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MARSHALL COUNTY HAS BEEN ALLOWED TO EXPIRE... AT 555 AM CDT...DOPPLER RADAR INDICATED THAT THE THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED BELOW SEVERE LIMITS. THE SEVERE THUNDERSTORM WARNING FOR WESTERN MARSHALL COUNTY HAS THEREFORE BEEN ALLOWED TO EXPIRE. TURNER j
Special weather statement, Jun 9, 5:58 AM CDT, 41 minutes before
MNZ004-091115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 558 AM CDT WED JUN 9 1999 ...THE SEVERE THUNDERSTORM WARNING FOR KITTSON COUNTY HAS BEEN CANCELLED... AT 556 AM CDT...DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS OVER KITTSON COUNTY HAVE WEAKENED BELOW SEVERE LIMITS. THE SEVERE THUNDERSTORM WARNING FOR KITTSON COUNTY HAS THEREFORE BEEN CANCELLED. TURNER
Local storm report, Jun 9, 6:15 AM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
615 AM CDT WED JUN 08 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
449 AM WARREN MN ROOF BLOWN OFF BUILDING
06/09/99 MARSHALL REPORTED BY HAM SPOTTERSpecial weather statement, Jun 9, 6:16 AM CDT, 23 minutes before
MNZ005-091135- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 616 AM CDT WED JUN 9 1999 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN ROSEAU COUNTY HAS BEEN ALLOWED TO EXPIRE... AT 615 AM CDT...DOPPLER RADAR INDICATED THAT THE THUNDERSTORM THAT HAD PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS. THE SEVERE THUNDERSTORM WARNING FOR WESTERN ROSEAU COUNTY HAS THEREFORE BEEN ALLOWED TO EXPIRE. TURNER
Local storm report, Jun 9, 6:36 AM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
635 AM CDT WED JUN 08 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
445 AM WARREN MN 60 MPH WINDS
06/09/99 MARSHALL REPORTED BY SHERIFF
540 AM KARLSTAD MN 50-60 MPH WINDS
06/09/99 KITTSON REPORTED BY HAM SPOTTERZThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 11:31 PM CDT | Severe Thunderstorm Warning | FGF | Ransom | 34 min |
| Jun 9, 12:08 AM CDT | Severe Thunderstorm Warning | FGF | Nelson | 32 min |
| Jun 9, 12:09 AM CDT | Severe Thunderstorm Warning | FGF | Towner | 36 min |
| Jun 9, 12:39 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 36 min |
| Jun 9, 12:43 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Towner | 32 min |
| Jun 9, 2:15 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 35 min |
| Jun 9, 4:15 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 30 min |
| Jun 9, 4:32 AM CDT | Severe Thunderstorm Warning | FGF | Traill | 33 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.