Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 318, NWS Grand Forks, ND

August 14, 2001Pennington County, Polk County, Red Lake County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 14, 2001, 11:48 PM CDT for Pennington County, Polk County, Red Lake County, Minnesota. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Aug 14, 2001, 11:48 PM CDT (04:48 UTC)
Expired: Aug 15, 2001, 12:45 AM CDT
In force: 57 min
Issued by: NWS Grand Forks, ND
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Pennington County, MN, Polk County, MN, Red Lake County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 79 km from the middle of the area, began a volume at 04:52 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.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 4.8 hours before the alert went out and 247 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: 1193 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1487 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

557 
WUUS53 KFGF 150448
SVRFAR
MNC113-119-125-150545-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
1148 PM CDT TUE AUG 14 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  WESTERN PENNINGTON COUNTY IN NORTHWEST MINNESOTA...
  NORTH CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA AND
  WESTERN RED LAKE COUNTY IN NORTHWEST MINNESOTA.
  INCLUDING THE CITY OF THIEF RIVER FALLS...

* UNTIL 1245 AM CDT.

* AT 1142 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
  LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 22
  MILES NORTHEAST OF GRAND FORKS TO 21 MILES EAST OF GRAND FORKS TO
  18 MILES SOUTHEAST OF GRAND FORKS...MOVEMENT WAS TO THE EAST AT 30
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...

  CROOKSTON AT 1150 PM...
  CARPENTERS CORNER AT 1210 AM...
  HUOT AT 1215 AM AND
  RED LAKE FALLS AT 1230 AM.

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

LAT...LON 4816 9681 4796 9672 4772 9685 4776 9618
          4799 9616 4814 9610


$$
08
DJK
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 Aug 14, 8:30 PM CDT, 3 hours 18 minutes earlier.

Area forecast discussion, Aug 14, 8:30 PM CDT, 3 hours 18 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
830 PM CDT TUE AUG 14 2001

...CONVECTION RE-DEVELOPING INVOF SFC FRONT IN NORTHEAST ND...

THUNDERSTORMS ARE DEVELOPING NEAR DVL NEAR SFC FRONT AND MAXIMIZED
SFC MOISTURE FLUX CONVERGENCE. FRONT WILL SAG SOUTH OVERNIGHT...WITH
DECENT UPPER LEVEL SUPPORT AHEAD OF SHORTWAVE. WILL MENTION
SCATTERED THUNDER IN ALL ZONES OVERNIGHT...AND KEEP FFA GOING IN
EASTERN FA.

.FGF...FLASH FLOOD WATCH OVERNIGHT FOR NORTHWEST MINNESOTA...FOR
AREAS ALONG AND NORTH OF A FOSSTON TO BEMIDJI LINE.

KELLENBENZ

In the hours before

Local storm report, Aug 14, 6:40 PM CDT, 5 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
640 PM CDT TUE AUG 14 2001

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

0325 PM    LANGDON                   ND   WIND DAMAGE
08/14/01   CAVALIER                       LARGE BRANCHES DOWN

0435 PM    4 NE STEPHEN              MN   .88 INCH HAIL
08/14/01   MARSHALL

0445 PM    GRAFTON                   ND   WIND DAMAGE
08/14/01   WALSH                          TREES DOWN

0449 PM    3 N DRAYTON               ND   WIND DAMAGE
08/14/01   PEMBINA                        TREES DOWN

0505 PM    STEPHEN                   MN   WIND DAMAGE
08/14/01   MARSHALL                       TREE DOWN

0510 PM    3 E KARLSTAD              MN   .88 INCH HAIL
08/14/01   KITTSON

0535 PM    3 NE RADIUM               MN   60 MPH TSTM GUST
08/14/01   MARSHALL

0548 PM    20 NW THIEF RIVER FALLS   MN   .75 INCH HAIL
08/14/01   PENNINGTON

0609 PM    CROOKSTON                 MN   .75 INCH HAIL
08/14/01   POLK

0613 PM    2 W CROOKSTON             MN   1.75 INCH HAIL
08/14/01   POLK

0620 PM    HUOT                      MN   1.75 INCH HAIL
08/14/01   RED LAKE

NNNN

Special weather statement, Aug 14, 7:08 PM CDT, 4 hours 40 minutes before

MNZ004-007-NDZ006>008-014>016-024-026>030-054-150110-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
708 PM CDT TUE AUG 14 2001

...SEVERE THUNDERSTORM WATCH NUMBER 671 HAS BEEN CANCELLED FOR
NORTHEAST NORTH DAKOTA AND EXTREME NORTHWEST MINNESOTA...

THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR NORTHEAST
NORTH DAKOTA AND EXTREME NORTHWEST MINNESOTA HAS BEEN CANCELLED. THE
THREAT OF SEVERE WEATHER HAS MOVED TO THE EAST...SO THE WATCH HAS
BEEN CANCELLED.

DJK

Local storm report, Aug 14, 10:20 PM CDT, 1 hour 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
1020 PM CDT TUE AUG 14 2001

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

0500 PM    10 NE GRAFTON             ND   WIND DAMAGE
08/14/01   WALSH                          TREES DOWN

0504 PM    3 W KENNEDY               MN   WIND DAMAGE
08/14/01   KITTSON                        POWER POLES DOWN

0635 PM    5 W HAROLD                MN   .75 INCH HAIL
08/14/01   POLK                           WINDS ALSO KNOCKED DOWN
                                          LARGE BRANCHES

0650 PM    4 N SUTTON                ND   .75 INCH HAIL
08/14/01   GRIGGS

0845 PM    4 SE OBERON               ND   1.75 INCH HAIL
08/14/01   BENSON

0855 PM    3 E SHEYENNE              ND   1.75 INCH HAIL
08/14/01   EDDY

0900 PM    6 SE SHEYENNE             ND   1.75 INCH HAIL
08/14/01   EDDY

0920 PM    5 W NEW ROCKFORD          ND   .75 INCH HAIL
08/14/01   EDDY

0929 PM    3 SE NEW ROCKFORD         ND   TORNADO
08/14/01   EDDY

0936 PM    11 E NEW ROCKFORD         ND   1 INCH HAIL
08/14/01   EDDY

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 7:16 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	29 min
Aug 14, 11:03 PM CDT	Severe Thunderstorm Warning	FGF	Polk	42 min
Aug 14, 11:17 PM CDT	Flash Flood Warning	FGF	Polk	6 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2001 Every severe thunderstorm warning in 2001

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.