Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 85, NWS Grand Forks, ND

June 22, 2002Norman County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 22, 2002, 11:21 AM CDT for Norman County, Minnesota. It was in force for 39 min. 1 report 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: Jun 22, 2002, 11:21 AM CDT (16:21 UTC)
Expired: Jun 22, 2002, 12:00 PM CDT
In force: 39 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Norman County, MN

What was reported inside it

Time	Report	Where	Remark
Jun 22, 11:30 AM CDT	Hail 1	Wheatville, MN

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 nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 4.4 hours before the alert went out and 276 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 221621
SVRFAR
MNC107-221700-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1121 AM CDT SAT JUN 22 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORMAN COUNTY IN NORTHWEST MINNESOTA.

* UNTIL NOON CDT.

* AT 1119 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTH OF ADA...OR ABOUT 29 MILES
  NORTHEAST OF FARGO...MOVEMENT WAS TO THE NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  ADA AT 1125 AM...
  TWIN VALLEY AT 1135 AM...
  GARY AT 1140 AM AND
  FLAMING AT 1145 AM.

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

LAT...LON 4726 9670 4713 9653 4729 9611 4749 9630


04

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 Jun 22, 10:30 AM CDT, 51 minutes earlier.

Area forecast discussion, Jun 22, 10:30 AM CDT, 51 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1030 AM CDT SAT JUN 22 2002

SPLIT FLOW WAS ACROSS NORTH AMERICA. A SHORT WAVE WAS OVER EASTERN
SASKATCHEWAN WILL MOVE EAST AND DIG. SOME DARKENING NOTED OVER
SASKATCHEWAN. UPPER LEVEL RIDGE WAS OVER THE NORTHERN PLAINS WITH
SHORT WAVE MOVING THROUGH THE FLOW. WATER VAPOR LOOP SHOWS SHORT
WAVE OVER EASTERN MT/WESTERN ND WITH MCS OVER NORTHERN ND AND
NORTHWEST MN. LOW LEVEL JET EXTENDS FROM ND TO THE TX PANHANDLE. 88D
VAD WIND HAS GOOD INFLOW WITH 35 TO 40 KTS AT LOW LEVELS. LOW LEVEL
JET FORECAST TO SHIFT OVER NORTHEAST MN TODAY. KBIS AND KMBX HAS LOW
LEVEL NORTHERLY VAD WINDS BELOW 4 THOUSAND AND 7 THOUSAND FEET
RESPECTIVELY. PRECIPITABLE WATER TO REMAIN AROUND 1.75 TO 2.00
INCHES. CONVERGENT FLOW ALSO NOTED AT 850 AND 700 MB. MESOSCALE
ANALYSIS SHOWS SURFACE CONVERGENT AXIS AND SURFACE MOISTURE FLUX
CONVERGENCE FROM NEAR BISMARCK TO BAUDETTE. BEST PRESSURE FALLS
EXTENDED FROM BAUDETTE TO WAHPETON AND WAS SHIFTING EAST. SURFACE
DEWPOINTS CONTINUE TO RISE THIS MORNINGE WITH UPPER 60S IN THE SOUTH
HALF OF THE FORECAST AREA AND THE LOWER 60S IN THE NORTH. EXPECT
STORM COMPLEX TO SHIFT EAST TODAY. WILL CHECK ZONES.

.FGF...FLOOD WATCH ENTIRE FA THROUGH SUNDAY.
HOPPES

In the hours before

Special weather statement, Jun 22, 5:36 AM CDT, 5 hours 45 minutes before

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-221400-

SPECIAL WEATHER STATEMENT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
536 AM CDT SAT JUN 22 2002

...SCATTERED SEVERE THUNDERSTORMS POSSIBLE ACROSS EASTERN NORTH
DAKOTA AND NORTHWESTERN MINNESOTA TODAY AND TONIGHT...

SYNOPSIS...A LOW PRESSURE AREA OVER SOUTH DAKOTA WITH A WARM
EXTENDING EASTWARD INTO CENTRAL MINNESOTA WILL CONTINUE TO INTENSIFY
TODAY. LOW LEVEL MOISTURE AND INSTABILITY WILL PUSH NORTHWARD OVER
THE FRONT SETTING THE STAGE FOR SCATTERED SEVERE THUNDERSTORMS.

AREA OF CONCERN...ALL OF EASTERN NORTH DAKOTA...NORTHWESTERN AND
WEST CENTRAL MINNESOTA.

TIME...6 AM THROUGH 3 PM AND THEN AGAIN DURING THE LATE EVENING INTO
THE OVERNIGHT HOURS.

TYPE OF HAZARD...LARGE HAIL IS THE PRIMARY HAZARD WITH ISOLATED
TORNADOES POSSIBLE NEAR THE WARM FRONT IN SOUTHEASTERN NORTH DAKOTA
AND WEST CENTRAL MINNESOTA. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE.

BRAMER

Local storm report, Jun 22, 9:03 AM CDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
903 AM CDT SAT JUN 22 2002

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

0835 AM    STEPHEN                   MN   1.75 INCH HAIL
06/22/02   MARSHALL

0820 AM    DRAYTON                   ND   .75 INCH HAIL
06/22/02   PEMBINA

0805 AM    DAHLEN                    ND   .88 INCH HAIL
06/22/02   NELSON

0730 AM    2W & 1S LANKIN            ND   .75 INCH HAIL
06/22/02   WALSH

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 8:25 AM CDT	Severe Thunderstorm Warning	FGF	Kittson, Marshall	50 min
Jun 22, 12:58 PM CDT	Flash Flood Warning	FGF	Lake of the Woods	8 hr
Jun 22, 2:40 PM CDT	Flash Flood Warning	FGF	Clearwater	6 hr
Jun 22, 2:43 PM CDT	Flash Flood Warning	FGF	Clearwater	6 hr
Jun 22, 3:01 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater	44 min
Jun 22, 3:11 PM CDT	Severe Thunderstorm Warning	FGF	Hubbard	34 min
Jun 22, 3:18 PM CDT	Tornado Warning	FGF	Hubbard	27 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.