Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 165, NWS Grand Forks, ND

August 1, 2002Becker County, Hubbard County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 1, 2002, 12:00 AM CDT for Becker County, Hubbard County, Minnesota. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 1, 2002, 12:00 AM CDT (05:00 UTC)
Expired: Aug 1, 2002, 12:45 AM CDT
In force: 45 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Becker County, MN, Hubbard County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 162 km from the middle of the area, began a volume at 05:03 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.

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

International Fa, MN (KINL), launched 00:00Z, 5.0 hours before the alert went out and 236 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1707 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1366 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

577 
WUUS53 KFGF 010500
SVRFAR
MNC005-057-010545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1200 AM CDT THU AUG 1 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  HUBBARD COUNTY IN NORTH CENTRAL MINNESOTA AND   
  EASTERN BECKER COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 1245 AM CDT.

* AT 1158 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES WEST OF SNELLMAN...OR ABOUT 19 MILES
  EAST OF DETROIT LAKES...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  PONSFORD AT 1210 AM...
  OSAGE AT 1215 AM AND
  TWO INLETS AT 1240 AM.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM THURSDAY
MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4689 9563 4676 9544 4706 9493 4715 9512


7

NNNN

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 31, 8:55 PM CDT, 3 hours 5 minutes earlier.

Area forecast discussion, Jul 31, 8:55 PM CDT, 3 hours 5 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, 6:21 PM CDT, 5 hours 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
621 PM CDT WED JUL 31 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0600 PM    3 S LEEDS                 ND   TORNADO
07/31/02   BENSON                         BRIEF TOUCHDOWN REPORTED 3
                                          MILES SOUTH OF LEEDS BY
                                          SPOTTER

0611 PM    LEEDS                     ND   2.00 INCH HAIL
07/31/02   BENSON

ME

Local storm report, Jul 31, 7:47 PM CDT, 4 hours 13 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

ME

Local storm report, Jul 31, 7:47 PM CDT, 4 hours 13 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

ME

Local storm report, Jul 31, 11:43 PM CDT, 17 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

ME

Local storm report, Jul 31, 11:43 PM CDT, 17 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

ME

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 31, 8:29 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	46 min
Jul 31, 8:51 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	39 min
Jul 31, 9:46 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	44 min
Jul 31, 10:11 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Pennington, Polk, Red Lake	49 min
Jul 31, 10:31 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	29 min
Jul 31, 11:00 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater, Polk	30 min
Aug 1, 12:39 AM CDT	Severe Thunderstorm Warning	FGF	Wadena	36 min
Aug 1, 1:33 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2002 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.