Severe Thunderstorm Warning 99, NWS Grand Forks, ND

Issued

Jul 17, 2001, 2:28 PM CDT (19:28 UTC)

Expired

Jul 17, 2001, 3:15 PM CDT

In force

47 min

Issued by

NWS Grand Forks, ND

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Beltrami County, MN

The Fargo/Grand Forks radar (KMVX), 190 km from the middle of the area, began a volume at 19:28 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.

395 
WUUS53 KFGF 171928
SVRFAR
MNC007-172015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
228 PM CDT TUE JUL 17 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTH CENTRAL BELTRAMI COUNTY IN NORTH CENTRAL MINNESOTA.

* UNTIL 315 PM CDT.

* AT 223 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER NORTHERN BELTRAMI COUNTY...OR ABOUT 51
  MILES EAST OF THIEF RIVER FALLS...MOVEMENT WAS TO THE NORTHEAST AT
  10 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN IN RURAL AREAS OF

  NORTHERN BELTRAMI COUNTY.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT
TUESDAY EVENING FOR EASTERN NORTH DAKOTA.

LAT...LON 4829 9527 4814 9513 4832 9458 4836 9491


$$
DJK
08

NNNN

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 10:25 AM CDT, 4 hours 3 minutes earlier.

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1025 AM CDT TUE JUL 17 2001

FORECAST CHALLENGE WILL CONTINUE TO BE CONVECTIVE THREAT

SFC MAP CONTINUES TO SHOW WEAK FLOW OVER FA...WITH DEWPOINTS AROUND
70. MORNING DENSE FOG OVER VALLEY CONTINUES TO BURN OFF...WITH
VISIBILITIES IMPROVING. WILL ALLOW DENSE FOG ADVISORY TO EXPIRE AT
16Z. ENTIRE AREA WILL BE EXTREMELY UNSTABLE THIS AFTERNOON...AS
CAPES APPROACH 3000 J/KG AND LI/S TO -10C IN SOUTH. PLENTY OF SFC
BOUNDARIES WILL BE PRESENT...AS 850MB JET INCREASES TO AROUND 25KT
INTO CENTRAL ND AROUND 18Z. IN ADDITION...UPPER LEVEL DIVERGENCE
INCREASES AFTER 18Z ACROSS WESTERN FA AS 1000-850MB CONVERGENCE
INTENSIFIES AS WELL. EXPECT SCATTERED STORMS TO DEVELOP AFTER 18Z
ACROSS NORTHERN 1/3 OF FA. FURTHER SOUTH...CONVECTIVE INHIBITION
REMAINS HIGH UNTIL AROUND 21Z...WITH VALUES AROUND 100 J/KG.
THEREAFTER...CONVECTIVE TEMPS AROUND 90 SHOULD BE REACHED IN
CONJUNCTION WITH LEFT EXIT REGION OF 65KT 300 MB SPEED MAX. SFC
WARMFRONT IS ALSO PROGGED JUST SOUTH OF REGION...WITH LOW LEVEL JET
INCREASING AND CAPES TO 4500 J/KG. SCATTERED STORM INITIATION SHOULD
COMMENCE HERE LATE THIS AFTERNOON...WITH ACTIVITY HAVING THE
POTENTIAL TO BECOME QUICKLY SEVERE GIVEN INSTABILITY AND 500MB FLOW
AROUND 40KT AND UPPER SPEED MAX. TRAINING OF ECHOES IS ALSO POSSIBLE
INTO OVERNIGHT AS SFC BOUNDARY WILL BE EAST/WEST ORIENTED PARALLEL
TO UPPER FLOW...WITH 850MB JET INCREASING TO 35KT INTO AREA UNTIL
06Z. MAY NEED TO ISSUE FFA WITH AFTERNOON PACKAGE ONCE SFC BOUNDARY
CAN BE IDENTIFIED BETTER THIS AFTERNOON. TEMPS LOOK GOOD...AND WILL
ADD CONVECTION TO ALL ZONES EXCEPT SOUTHEAST WHERE IT SHOULD HOLD
OFF UNTIL AFTER 00Z.

.FGF...NONE.

KELLENBENZ

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

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.