Alert archive / Minnesota / Tornado Warnings in 1999
Tornado Warning 36, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 25, 1999, 1:52 PM CDT for Mahnomen County, Minnesota. It was in force for 33 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 25, 1999, 1:52 PM CDT (18:52 UTC)
- Expired
- Jul 25, 1999, 2:25 PM CDT
- In force
- 33 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Mahnomen County, MN
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 25, 11:00 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 6.9 hours before the alert went out and 233 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2231 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 251853 TORFAR MNC087-251925- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 152 PM CDT SUN JUL 25 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN MAHNOMEN COUNTY IN NORTHWESTERN MINNESOTA * UNTIL 225 PM CDT * AT 145 PM CDT NATIONAL WEATHER SERVICE INDICATED A TORNADO 25 MILES NORTH OF DETROIT LAKES OR 14 MILES WEST OF NAYTAHWAUSH MOVING NORTHEAFST AT 30 MPH. * THE TORNADO WILL BE NEAR... WAUBAN AT 155 PM CDT THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH OF A TORNADO ABANDON CAR AND MOBILE HOMES FOR A STURDY BUILDING. TURNER/ANDERSON &
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 25, 10:25 AM CDT, 3 hours 27 minutes earlier.
Area forecast discussion, Jul 25, 10:25 AM CDT, 3 hours 27 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1025 AM CDT SUN JUL 25 1999 ...FORECAST CHALLANGE SEVERE WEATHER THREAT... ATM IS CAPPED ATTM. PULSE TYPE TSTMS ARE OCCURRING ALG SFC CDFNT WHICH IS MOVG INTO RRV LATE THIS MORNING. ISOLD TSTM PRODUCED LARGE HAIL NR GFK AT 15Z. CAPES NEAR 5000 J/KG ARE ANTICPATED THIS AFTN ACRS MUCH OF THE ERN HALF OF THE CWFA BASED ON MODIFIED SOUNDINGS. BEST MSTR CONVERGENGE AND INSTABILITY IS EXPECTED TO BE LOCATED ACRS SERN ND AND WCNTRL MN FROM 21Z TO 01Z. BLV ONLY ISOLD SVR TSTMS TIL LATER THIS AFTN WHEN CAP IS BROKEN. MESO ETA FCST OF FNTL POSITION IS VERY GOOD BASED ON 15Z OBS. WILL CONT USING ITS FNTL FCST THRU 03Z. CURRENT HAZARDOUS WEATHER OUTLOOK STILL HAS EXPECTED LOCATION AND TIMING ON TARGET SO WILL NOT UPDATE ATTM. MAY WAIT TIL 18Z TO PIN-POINT MORE A SPECIFIC AREA. ZONES ARE ALREADY UPDATED. MENTIONED 100-105 HEAT INDEX FOR DTL-FFM AREA IN SPS. DO NOT ANTICIPATE AN ADVISORY ATTM. .FGF...NONE. BELLES
In the hours before
Special weather statement, Jul 25, 8:36 AM CDT, 5 hours 16 minutes before
MNZ027-028-030>032-040-252035- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 836 AM CDT SUN JUL 25 1999 ...EXPECT VERY WARM TEMPERATURES AND HUMIDITY TODAY... TEMPERATURES IN THE LOWER 90S ALONG WITH HIGH HUMIDITY WILL RAISE THE HEAT INDEX INTO THE LOWER 100S THIS AFTERNOON. WITH THIS TYPE OF EXTREME HEAT...CAUTION IS ADVISED. CITIES AFFECTED BY THIS EXTREME HEAT INCLUDE FERGUS FALLS...ELBOW LAKE...WADENA...AND DETROIT LAKES. AVOID HEAT STROKE. DRINK PLENTY OF FLUIDS AND TAKE FREQUENT BREAKS IF YOU ARE OUTDOORS. BELLES
Special weather statement, Jul 25, 9:42 AM CDT, 4 hours 10 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-251510- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 942 AM CDT SUN JUL 25 1999 ...SEVERE THUNDERSTORM WATCH CANCELLED... SEVERE THUNDERSTORM WATCH NUMBER 535 FOR NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA HAS BEEN CANCELLED. HOWEVER...THUNDERSTORMS ARE STILL EXPECTED ACROSS THE REGION THROUGH THE DAY. PLEASE CONTINUE TfO MONITOR YOUR LOCAL RADIO AND TELEVISION STATIONS OR NOAA WEATHER RADIO FOR THE LATEST INFORMATION CONCERNING THUNDERSTORMS THAT MAY MOVE INTO YOUR AREA. KENNEDY
Local storm report, Jul 25, 10:29 AM CDT, 3 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
1029 AM CDT SUN JUL 25 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 AM 3SE INKSTER ND .75 INCH HAIL
07/25/99 GRAND FORKSSpecial weather statement, Jul 25, 1:48 PM CDT, 4 minutes before
MNZ001-004-005-007-008-013-NDZ027-029-030-038-251945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 148 PM CDT SUN JUL 25 1999 ...THE TORNADO WATCH HAS BEEN CANCELLED FOR A PORTION OF NORTHEASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA... TORNADO WATCH 586 IS NO LONGER IN EFFECT FOR THE FOLLOWING COUNTIES IN NORTH DAKOTA... GRAND FORKS...TRAILL...BARNES...STEELE AND IS NO LONGER IN EFFECT IN NORTHWEST MINNESOTA 8FOR... PENNINGTON...KITTSON...MARSHALL...WESTERN POLK...ROSEAU BELLES
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 10:37 AM CDT | Severe Thunderstorm Warning | FGF | Marshall | 33 min |
| Jul 25, 11:31 AM CDT | Severe Thunderstorm Warning | FGF | Marshall | 29 min |
| Jul 25, 11:52 AM CDT | Severe Thunderstorm Warning | FGF | Roseau | 33 min |
| Jul 25, 11:59 AM CDT | Severe Thunderstorm Warning | FGF | Marshall | 36 min |
| Jul 25, 12:26 PM CDT | Severe Thunderstorm Warning | FGF | Pennington | 34 min |
| Jul 25, 12:32 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 33 min |
| Jul 25, 12:44 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 36 min |
| Jul 25, 1:09 PM CDT | Tornado Warning | FGF | Clay | 36 min |
| Jul 25, 1:18 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Mahnomen, Norman | 32 min |
| Jul 25, 1:59 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 36 min |
| Jul 25, 2:11 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 34 min |
| Jul 25, 2:41 PM CDT | Tornado Warning | FGF | Becker | 34 min |
| Jul 25, 2:54 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 36 min |
| Jul 25, 3:11 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 34 min |
Nearby
Tornado Warnings in Minnesota, 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.