Alert archive / North Dakota / Tornado Warnings in 1999
Tornado Warning 31, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 22, 1999, 5:48 AM CDT for Nelson County, North Dakota. It was in force for 32 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 22, 1999, 5:48 AM CDT (10:48 UTC)
- Expired
- Jul 22, 1999, 6:20 AM CDT
- In force
- 32 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Nelson 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 22, 3:45 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 10.8 hours before the alert went out and 228 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
- 3546 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 15.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 221048 RRA TORFAR NDC063-221120- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 548 AM CDT THU JUL 22 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... NORTHERN NELSON COUNTY IN NORTHEASTERN NORTH DAKOTA * UNTIL 620 AM CDT * AT 546 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 13 MILES NORTHEAST OF DEVILS LAKE...MOVING EAST AT 35 MPH. | * THE TORNADO WILL REMAIN IN RURAL AREAS NORTH OF LAKOTA IF YOU ARE IN THE PATH OF A TORNADO THE SAFEST PLACE IS A BASEMENT. GET UNDER A STAIRWAY OR A PIECE OF STURDY FURNITURE. GODON
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 22, 3:25 AM CDT, 2 hours 23 minutes earlier.
Area forecast discussion, Jul 22, 3:25 AM CDT, 2 hours 23 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 325 AM CDT THU JUL 22 1999 FCST CHALLENGE: SVR TSTM THREAT TODAY...QPF. MODEL SELECTION: ETA CARRYING THE BALL THIS WEEK. CLOSED SFC LOW PLACEMENT AT 06Z HANDLED WELL BY ETA ALG WITH LOW LEVEL INSTABILITY PARAMETERS. SIGNIFICANT DIFFERENCE BETWEEN ETA AND NGM ON INITIALIZATION OF DOUBLE VORT PULLING NEWD FROM MT/AB FRONT RANGE. ETA MAINTAINS STRENGTH OF SRN VORT AND PULLS SIG UVVS THROUGH ND INTO NWRN MN THROUGH 24HRS. NEAR TERM: SFC LOW DEEPENING IN SWRN ND WITH SFC BOUNDARY THROUGH NRN ND TO NRN RRV. DEWPTS IN UPER 60S TO LOW 70S ACROSS NRN FGF CWFA WITH SFC BASED LIS STILL IN MINUS 5 OR 6 RANGE. THETAE RIDGE IN CNTRL ND LEANING EWD INTO NWRN MN BY 18Z. MODERATE INSTABILITY EXISTS NOW...AND WITH SIG UVVS PROGGED TO TRACK THROUGH TDY EXPECT STRONG TO SVR TSTM ACTIVITY MOST AREAS. FIRST THREAT AREA WILL BE NERN ND THIS AM AS BOW ECHO PATTERN MOVES ACROSS NRN ND. LOW LEVEL SHEAR PROFILE AND INSTABILITIES WILL SUPPORT SUPPERCELL DEVLPMNT THROUGH MIDDAY WHILE 50KT MID LEVEL JET IS TRACKING ACROSS ND ATTM. MODERATE INSTABILITIES CONTINUE THROUGH THIS AFTERNOON...HOWEVER LOW LEVEL SHEAR PROFILES DIMINISH SOMEWHAT. EXPECT SVR THREAT TO SHIFT INTO NWRN MN THIS AFTERNOON AND EVENING. MID TERM: RIDGE REBOUNDS SLIGHTLY OVR CNTRL ND AND THETAE RIDGE ROCKS BACK TO CNTRL AND ERN ND...WAITING FOR NEXT IMPULSE IN THE FLOW. FRIDAY LOOKS TO BE A BETWEEN SYSTEMS DAY THOUGH THERE WILL BE LITTLE RELIEF FROM THE HEAT AND HUMIDITY. EXTENDED: NOT MUCH TIME TO LOOK DEEP INTO EXTENDED. 00Z AVN CONTINUES TO TARGET SAT PM AND SUNDAY AS NEXT TSTM DAY...WITH LITTLE FOCUSED ACTIVITY FRIDAY NIGHT INTO SATURDAY. COORD WITH SPC...BIS AND MSP .FGF...SVR TSTM WATCH 568 FOR NORTHEAST ND AND EXTREME NW MN UNTIL 9AM CDT. GUST
In the hours before
Special weather statement, Jul 22, 5:30 AM CDT, 18 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-221400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 530 AM CDT WED JUL 22 1999 ...SEVERE THUNDERSTORMS POSSIBLE THIS MORNING IN NORTHEASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA... SYNOPSIS...A BOW ECHO WILL TRAVEL ACROSS NORTHERN NORTH DAKOTA INTO NORTHWEST MINNESOTA THIS MORNING. AN UPPER LEVEL DISTURBANCE WILL SUPPORT THIS SYSTEM AS IT MOVES ALONG A WEAK SURFACE TROUGH. ADDITIONAL THUNDERSTORM ACTIVITY IS EXPECTED THIS AFTERNOON AS VERY MOIST AND WARM AIR KEEPS THE AREA QUITE UNSTABLE. AREA OF CONCERN...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEASTERN NORTH DAKOTA INTO EXTREME NORTHWEST MINNESOTA THIS MORNING UNTIL 9 AM CDT. THERE IS A SLIGHT RISK FOR ADDITIONAL SEVERE THUNDERSTORMS THROUGH THE AFTERNOON AND EARLY EVENING IN NORTHWEST MINNESOTA. TIME...SEVERE THUNDERSTORM WATCH UNTIL 9 AM CDT. ADDITIONAL SEVERE ACTIVITY FROM NOON UNTIL 9PM CDT. TYPE OF HAZARD...LARGE HAIL AND DAMAGING WIND AND POSSIBLE TORNADOS. GUST
Special weather statement, Jul 22, 5:30 AM CDT, 18 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-221400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 530 AM CDT WED JUL 22 1999 ...SEVERE THUNDERSTORMS POSSIBLE THIS MORNING IN NORTHEASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA... SYNOPSIS...A BOW ECHO WILL TRAVEL ACROSS NORTHERN NORTH DAKOTA INTO NORTHWEST MINNESOTA THIS MORNING. AN UPPER LEVEL DISTURBANCE WILL SUPPORT THIS SYSTEM AS IT MOVES ALONG A WEAK SURFACE TROUGH. ADDITIONAL THUNDERSTORM ACTIVITY IS EXPECTED THIS AFTERNOON AS VERY MOIST AND WARM AIR KEEPS THE AREA QUITE UNSTABLE. AREA OF CONCERN...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEASTERN NORTH DAKOTA INTO EXTREME NORTHWEST MINNESOTA THIS MORNING UNTIL 9 AM CDT. THERE IS A SLIGHT RISK FOR ADDITIONAL SEVERE THUNDERSTORMS THROUGH THE AFTERNOON AND EARLY EVENING IN NORTHWEST MINNESOTA. TIME...SEVERE THUNDERSTORM WATCH UNTIL 9 AM CDT. ADDITIONAL SEVERE ACTIVITY FROM NOON UNTIL 9PM CDT. TYPE OF HAZARD...LARGE HAIL AND DAMAGING WIND AND POSSIBLE TORNADOS. GUST
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 3:49 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy | 46 min |
| Jul 22, 4:23 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey, Towner | 47 min |
| Jul 22, 5:11 AM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 34 min |
| Jul 22, 5:25 AM CDT | Tornado Warning | FGF | Ramsey | 35 min |
| Jul 22, 5:56 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 34 min |
| Jul 22, 6:24 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 31 min |
| Jul 22, 6:54 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 46 min |
Nearby
Tornado Warnings in North Dakota, 1999Every tornado warning in 1999Tornadoes 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.