Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 167, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 1, 2002, 12:40 AM CDT for Barnes County, Steele County, Traill County, North Dakota. It was in force for 50 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 1, 2002, 12:40 AM CDT (05:40 UTC)
- Expired
- Aug 1, 2002, 1:30 AM CDT
- In force
- 50 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Barnes County, ND, Steele County, ND, Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 24 km from the middle of the area, began a volume at 05:43 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 1, 12:45 AM CDT | Thunderstorm Wind 50 M | Pillsbury, ND | A 58 mph wind gust was measured at an NDAWN mesonet site. |
| Aug 1, 12:53 AM CDT | Hail 0.75 | Luverne, ND | |
| Aug 1, 12:55 AM CDT | Hail 1.5 | Pillsbury, ND |
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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
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 31, 6:25 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 5.7 hours before the alert went out and 246 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
- 1400 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 2219 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
961
WUUS53 KFGF 010540
SVRFAR
NDC003-091-097-010630-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1239 AM CDT THU AUG 1 2002
THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN BARNES COUNTY IN SOUTHEAST NORTH DAKOTA...
STEELE COUNTY IN SOUTHEAST NORTH DAKOTA AND
TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA.
* UNTIL 130 AM CDT.
* AT 1238 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 48
MILES SOUTHWEST OF GRAND FORKS TO 27 MILES NORTHEAST OF VALLEY
CITY...MOVEMENT WAS TO THE EAST AT 60 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
FINLEY AT 1240 AM...
SHERBROOKE AT 1245 AM...
GOLDEN LAKE AT 1250 AM AND
ROSEVILLE AT 1255 AM.
DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL
POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED
BUILDING IMMEDIATELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM THURSDAY
MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.
LAT...LON 4766 9798 4717 9797 4716 9773 4726 9772
4726 9687 4766 9690
23
NNNNWhat 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 31, 8:55 PM CDT, 3 hours 45 minutes earlier.
Area forecast discussion, Jul 31, 8:55 PM CDT, 3 hours 45 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 855 PM CDT WED JUL 31 2002 FORECAST CHALLENGE FOR TONIGHT IS SEVERE WEATHER. KMVX HAS NUMEROUS SEVERE STORMS MOVING THROUGH E ND INTO NW MN. WITH COLD FRONT EXTENDING THROUGH ND ALONG A LANGDON TO BAKER TO BISMARCK LINE... STILL HAVE A LONG TIME TO GO BEFORE EXPECT SEVERE TO BE OUT OF AREA. WITH WATCH OVER DEVILS LAKE AREA EXPECTED TO EXPIRE AT 9 PM...AND LINE OF SEVERE CLOSE TO EXIT THAT AREA...TIMING FOR WATCH EXPIRATION LOOKS GOOD. REMAINDER OF AREA STILL UNDER SEVERE THUNDERSTORM WATCH UNTIL 1 AM...WITH LOADED GUN SOUNDINGS...STRONG SURFACE BOUNDARY... JET SUPPORT...DARKENING ON WATER VAPOR STARTING TO SHOW UP...ETC ...SO WATCH FOR REMAINDER OF AREA UNTIL 1 AM STILL LOOKS GOOD. CONSEQUENTLY...CURRENT FORECAST WELL IN HAND. WILL ONLY NEED TO MAKE MINOR CHANGES. .FGF...NONE. NG
In the hours before
Local storm report, Jul 31, 7:47 PM CDT, 4 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
747 PM CDT WED JUL 31 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 AM CHURCHS FERRY ND .75 INCH HAIL
07/31/02 RAMSEY
0610 PM 5 N LEEDS ND 1.75 INCH HAIL
07/31/02 BENSON
0618 PM LEEDS ND 1.00 INCH HAIL
07/31/02 BENSON
0618 PM 4 E LEEDS ND 2.00 INCH HAIL
07/31/02 BENSON
0627 PM CHURCHS FERRY ND .75 INCH HAIL
07/31/02 RAMSEY
0720 PM 2 N DEVILS LAKE ND .75 INCH HAIL
07/31/02 RAMSEY WALL CLOUD
0720 PM MADDOCK ND 1.00 INCH HAIL
07/31/02 BENSON GROUND COVERED TOTALLY
WHITE
0730 PM 2 NW DEVILS LAKE ND 1.00 INCH HAIL
07/31/02 RAMSEY
MELocal storm report, Jul 31, 7:47 PM CDT, 4 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAND FORKS, ND
747 PM CDT WED JUL 31 2002
...CORRECTED TIME OF FIRST REPORT...
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 PM CHURCHS FERRY ND .75 INCH HAIL
07/31/02 RAMSEY
0610 PM 5 N LEEDS ND 1.75 INCH HAIL
07/31/02 BENSON
0618 PM LEEDS ND 1.00 INCH HAIL
07/31/02 BENSON
0618 PM 4 E LEEDS ND 2.00 INCH HAIL
07/31/02 BENSON
0627 PM CHURCHS FERRY ND .75 INCH HAIL
07/31/02 RAMSEY
0720 PM 2 N DEVILS LAKE ND .75 INCH HAIL
07/31/02 RAMSEY WALL CLOUD
0720 PM MADDOCK ND 1.00 INCH HAIL
07/31/02 BENSON GROUND COVERED TOTALLY
WHITE
0730 PM 2 NW DEVILS LAKE ND 1.00 INCH HAIL
07/31/02 RAMSEY
MELocal storm report, Jul 31, 11:43 PM CDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1143 PM CDT WED JUL 31 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0735 PM LANKIN ND FLOOD
07/31/02 WALSH STREET FLOODING DUE TO
HEAVY RAINS
0737 PM LANKIN ND 70 MPH TSTORM WIND
07/31/02 WALSH
0740 PM DEVILS LAKE ND .75 INCH HAIL
07/31/02 RAMSEY FUNNEL CLOUD REPORTED BY
COOPERATIVE OBSERVER
0805 PM LANKIN ND 1.00 INCH HAIL
07/31/02 WALSH WIND DAMAGE
0902 PM GRAFTON ND FLOOD
07/31/02 WALSH STREET FLOODING DUE TO
HEAVY RAINS
MELocal storm report, Jul 31, 11:43 PM CDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAND FORKS, ND
1143 PM CDT WED JUL 31 2002
...CORRECTED TIME OF SECOND REPORT...
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0735 PM LANKIN ND FLOOD
07/31/02 WALSH STREET FLOODING DUE TO
HEAVY RAINS
0757 PM LANKIN ND 70 MPH TSTORM WIND
07/31/02 WALSH
0740 PM DEVILS LAKE ND .75 INCH HAIL
07/31/02 RAMSEY FUNNEL CLOUD REPORTED BY
COOPERATIVE OBSERVER
0805 PM LANKIN ND 1.00 INCH HAIL
07/31/02 WALSH WIND DAMAGE
0902 PM GRAFTON ND FLOOD
07/31/02 WALSH STREET FLOODING DUE TO
HEAVY RAINS
METhe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 7:03 PM CDT | Severe Thunderstorm Warning | FGF | Ramsey | 42 min |
| Jul 31, 7:19 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier | 41 min |
| Jul 31, 7:33 PM CDT | Severe Thunderstorm Warning | FGF | Benson | 42 min |
| Jul 31, 7:36 PM CDT | Tornado Warning | FGF | Ramsey | 39 min |
| Jul 31, 7:40 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 50 min |
| Jul 31, 8:06 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 54 min |
| Jul 31, 8:24 PM CDT | Severe Thunderstorm Warning | FGF | Nelson | 51 min |
| Jul 31, 8:26 PM CDT | Severe Thunderstorm Warning | FGF | Walsh | 49 min |
| Jul 31, 11:41 PM CDT | Severe Thunderstorm Warning | FGF | Eddy | 49 min |
| Aug 1, 12:09 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 51 min |
| Aug 1, 12:53 AM CDT | Severe Thunderstorm Warning | FGF | Cass | 37 min |
| Aug 1, 1:33 AM CDT | Severe Thunderstorm Warning | FGF | Cass | 42 min |
| Aug 1, 1:37 AM CDT | Severe Thunderstorm Warning | FGF | Barnes | 23 min |
| Aug 1, 2:11 AM CDT | Severe Thunderstorm Warning | FGF | Cass | 49 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002
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.