Alert archive / Minnesota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 191, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 25, 1999, 1:59 PM CDT for Clay County, Minnesota. It was in force for 36 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 25, 1999, 1:59 PM CDT (18:59 UTC)
- Expired
- Jul 25, 1999, 2:35 PM CDT
- In force
- 36 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Clay County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 25, 2:10 PM CDT | Thunderstorm Wind | Ulen, MN | Several trees were damaged. |
| Jul 25, 2:12 PM CDT | Thunderstorm Wind | Ulen, MN | Several trees were blown down. |
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 |
|---|---|---|---|
| Jul 25, 11:00 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 7.0 hours before the alert went out and 266 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
- 1810 J/kg
- Mixed-layer CIN
- -229 J/kg
- Mixed-layer LCL
- 1757 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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 25, 10:25 AM CDT, 3 hours 34 minutes earlier.
Area forecast discussion, Jul 25, 10:25 AM CDT, 3 hours 34 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 23 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 17 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 30 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, 11 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, 9:55 AM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 35 min |
| Jul 25, 10:31 AM CDT | Severe Thunderstorm Warning | FGF | Barnes | 34 min |
| Jul 25, 10:37 AM CDT | Severe Thunderstorm Warning | FGF | Walsh | 33 min |
| Jul 25, 12:09 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 26 min |
| Jul 25, 12:23 PM CDT | Tornado Warning | FGF | Cass | 32 min |
| Jul 25, 12:37 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 33 min |
| Jul 25, 12:48 PM CDT | Tornado Warning | FGF | Cass | 32 min |
| Jul 25, 12:55 PM CDT | Severe Thunderstorm Warning | FGF | Ransom | 35 min |
| Jul 25, 1:31 PM CDT | Severe Thunderstorm Warning | FGF | Ransom | 34 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, 1:52 PM CDT | Tornado Warning | FGF | Mahnomen | 33 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
Severe Thunderstorm Warnings in Minnesota, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.