Severe Thunderstorm Warning 83, NWS Great Falls, MT

Issued

Aug 4, 2001, 3:12 PM MDT (21:12 UTC)

Expired

Aug 4, 2001, 4:15 PM MDT

In force

63 min

Issued by

NWS Great Falls, MT

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Lewis and Clark County, MT

The Great Falls radar (KTFX), 87 km from the middle of the area, began a volume at 21:15 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.

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.

000 
WUUS55 KTFX 042114
SVRGTF

MTC049-042215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
312 PM MDT SAT AUG 4 2001

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LEWIS AND CLARK COUNTY IN WEST CENTRAL MONTANA
  THIS INCLUDES THE CITY OF HELENA

* UNTIL 415 PM MDT

* AT 310 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  LINE OF SEVERE THUNDERSTORMS FROM 2 MILES SOUTH OF HELENA TO 16    
  MILES NORTHEAST OF HELENA...MOVING NORTHEAST AT 5 MPH.

* SEVERE THUNDERSTORMS WILL BE REMAIN OVER SOUTHEAST LEWIS AND CLARK 
  COUNTY UNTIL 415 PM MDT

VERY LARGE HAIL AND STRONG WIND IS POSSIBLE WITH THESE SEVERE 
THUNDERSTORMS. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN 
A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN GREAT FALLS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM MDT
SATURDAY EVENING FOR WESTERN MONTANA.

LAT...LON 4686 11170 4700 11202 4649 11230 4659 11178


~

NWS Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 3:00 PM MDT, 12 minutes earlier.

SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
3 PM MDT SAT AUG 4 2001

THUNDERSTORMS FORMING ALONG BACK EDGE OF DRY SLOT...PER WATER VAPOR
IMAGERY...A FAVORED LOCATION.  IN COORD WITH SPC AND OTHER MT
OFFICES...SVR TSTM WATCH ISSUED TILL 7 PM.  AXIS OF S/W STILL WEST OF
MT AND WILL TRAVERSE CWA BETWEEN 00-06Z.  THREAT OF DEEP CONVECTION
CONTINUES... NOW TILL ABOUT 01Z...THEN MAINLY SCATTERED SHOWERS TILL
MIDNIGHT. BEYOND THAT...MODELS IN FAIR AGREEMENT.  NEXT COUPLE OF
DAYS...UPPER RIDGE BUILDS BACK INTO MT....FLOW BECOMES DRIER AND MORE
WESTERLY.  QUITE WARM WITH LITTLE THREAT OF PCPN.  MIELKE.

EXTENDED FORECAST DISCUSSION...
RIDGE WILL CONTINUE WITH SOME DECREASE IN HEIGHTS BY WED. DO EXPECT
A LITTLE MORE TROFFING BY LATER IN THE PERIOD...SO THIS SHOULD KEEP
IT WARM THROUGH TUESDAY. WITH THE DECREASE IN HEIGHTS...TEMPS WILL
COOLE INTO THE 70S AND 80S WITH SCATTERED SHOWERS/TSTMS.

CCF NUMBERS
GTF UU 056 087 053 090 055 014001
CTB UU 052 082 052 085 053 013001
HLN UU 055 088 055 092 055 014101
BZN UU 052 090 052 093 054 014001
WEY UU 044 082 042 085 045 015111
DLN UU 048 086 050 089 051 014001
HVR UU 062 090 057 095 057 014001
LWT UU 056 087 056 090 056 014201

Severe Thunderstorm Warnings in Montana, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.