Montana, 2001

Heavy Snow in Montana, June 12 to 13, 2001

June 12 to 13, 2001 · NWS TFX · 1 event in 1 county or zone

1 heavy snow, as filed by the National Weather Service.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Great Falls, MT wrote its last area forecast discussion before the first event at Jun 12, 7:45 PM MST, 1 hour 15 minutes earlier.

Area forecast discussion, Jun 12, 7:45 PM MST, 1 hour 15 minutes before
SOUTHWEST AND NORTH CENTRAL MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
                                                                 845 PM MDT TUE JUN 12 2001

...UPDATE TO ZONES BY 915 TO FRESHEN WORDING...
UPPER LEVEL LOW PRESSURE CENTER IS CURRENTLY OVER SOUTHERN IDAHO.  A
SURFACE LOW OVER SOUTHEAST MONTANA IS CAUSING NORTHEAST FLOW THROUGH THE
LOWER AND MIDDLE LEVELS OF THE ATMOSPHERE. THE AIRMASS HAS BEEN SLIGHTLY
UNSTABLE AND SOME LOCATIONS HAVE HAD THE BENEFIT OF HEAVY
SHOWERS...WHILE OTHER LOCATIONS HAVE ALSO RECEIVED EXTRA AMOUNTS FROM
UPSLOPE CONDITIONS ALONG EASTERN SLOPES. THUS...PRECIPITATION AMOUNTS
HAVE VARIED SIGNIFICANTLY ACROSS THE ZONES WITH 2.10 INCHES IN AUGUSTA
AND AS LITTLE AS .07 IN GREAT FALLS. THE LOW PRESSURE SYSTEM WILL
GRADUALLY MOVE SOUTHEAST AND THE MAIN AREA OF MOISTURE ASSOCIATED WITH
THE UPPER LOW WILL ALSO MOVE SOUTHEAST...MAINLY EFFECTING THE SOUTHERN
ZONES.  LOW LEVEL WINDS REMAIN NORTH TO NORTHEAST THROUGH THE NIGHT AND
UPSLOPE CONDITIONS SHOULD CONTINUE TO DEVELOP PRECIPITATION OVER THE
NORTHERN AND CENTRAL ZONES. CURRENT FORECAST LOOKS GOOD.

EXTENDED...PERIOD BEGINS WITH A WEAK SHORT WAVE MOVING THROUGH THE
REGION. THE ASSOCIATED COLD FRONT WILL KEEP THE AIRMASS UNSETTLED...WITH
THE EFFECTS FELT MOST STRONGLY ALONG THE NORTHERN ZONES. A GRADUAL
WARMING TREND BEGINS SATURDAY AS A WEAK RIDGE DEVELOPS. MODELS ARE
SIMILAR ALTHOUGH THE ECMWF DEVELOPS A SHARPER RIDGE COMPARED TO EITHER
THE MRF AND UKMET. THIS IS REASONABLE WITH THE DEVELOPMENT OF A DEEP LOW
PRESSURE CENTER OVER THE EASTER PACIFIC. UPPER LEVEL FLOW GOES SOUTHWEST
BY MONDAY AS THE LOW SYSTEM MOVES INTO THE PACIFIC NORTHWEST. THIS
UNSTABLE PATTERN WILL ALLOW AN INCREASING CHANCE OF AFTERNOON CONVECTION
MONDAY AND TUESDAY.  ZELZER

In the hours before

Local storm report, Jun 12, 3:41 PM MST, 5 hours 19 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
441 PM MDT TUE JUN 12 2001

TIME(MDT)  .....EVENT  LOCATION..... ST   ...EVENT/REMARKS...........
           .....COUNTY LOCATION.....

0830 AM    STANFORD                  MT   RAIN
06/12/01   JUDITH  BASIN                  0.80 OVERNIGHT

0930 AM    GRASSRANGE                MT   RAIN
06/12/01   FERGUS                         01.05 OVERNIGHT

1100 AM    4 E ENNIS      Y           MT   TORNADO
06/12/01   MADISON                        REPORTED BY TOWN
                                          OFFICER...UPROOTED TREES
                                          IN FOREST

NNNN

Event by event

1 heavy snow. Local standard time, as filed.

Heavy Snow, Southern Lewis and Clark

When
June 12, 9:00 PM MST to June 13, 8:00 AM MST
Where
Southern Lewis and Clark forecast zone
Reported by
PARK/FOREST SERVICE

8 inches snowfall reported at Lincoln Ranger Station of US Park Service.

What these are

Heavy Snow
Snowfall reaching the local warning threshold without the other hazards of a winter storm.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Montana in 2001Every state in 2001This day in weather historyWarnings in Montana, June 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5254346.