Alert archive / Montana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 2, NWS Great Falls, MT

June 8, 2016Cascade County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 8, 2016, 6:43 PM MDT for Cascade County, Montana. It was in force for 47 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 8, 2016, 6:43 PM MDT (00:43 UTC)
Expired: Jun 8, 2016, 7:30 PM MDT
In force: 47 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Cascade County, MT

The radar

The Great Falls radar (KTFX), 12 km from the middle of the area, began a volume at 00:47 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.

What was reported inside it

Time	Report	Where	Remark
Jun 8, 6:55 PM MDT	TSTM WND GST 45	1 Wsw Ulm, MT	ESTIMATED WIND GUST AROUND 45 MPH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.7 hours before the alert went out and 69 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: 8 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 3437 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

684 
WUUS55 KTFX 090043
SVRTFX
MTC013-090130-
/O.NEW.KTFX.SV.W.0002.160609T0043Z-160609T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
643 PM MDT WED JUN 8 2016

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CASCADE COUNTY IN CENTRAL MONTANA...

* UNTIL 730 PM MDT

* AT 642 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES
  SOUTHEAST OF FORT  SHAW...OR 8 MILES NORTH OF CASCADE...MOVING
  NORTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  GREAT FALLS...CASCADE...FORT SHAW...FORT  SHAW...BLACK EAGLE...
  SAND COULEE...FIRST PEOPLES BUFFALO JUMP STATE PARK...TRACY...
  SLUICE BOXES STATE PARK...VAUGHN...STOCKETT...CENTERVILLE...
  SUN RIVER...ULM...EDEN AND MALMSTROM AFB.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 15 BETWEEN MILE MARKERS 252 AND 299.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4702 11168 4758 11189 4758 11161 4767 11162
      4767 11128 4719 11084
TIME...MOT...LOC 0042Z 244DEG 14KT 4739 11173 

HAIL...<.75IN
WIND...60MPH
 
$$

BRUSDA

2 follow-up statements

986 
WWUS55 KTFX 090053
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
653 PM MDT WED JUN 8 2016

MTC013-090130-
/O.CON.KTFX.SV.W.0002.000000T0000Z-160609T0130Z/
CASCADE MT-
653 PM MDT WED JUN 8 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR CENTRAL CASCADE COUNTY...

AT 653 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES SOUTHWEST
OF GREAT FALLS...MOVING EAST AT 35 MPH.

HAZARD...70 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT CONSIDERABLE TREE DAMAGE. DAMAGE IS LIKELY TO MOBILE 
         HOMES...ROOFS...AND OUTBUILDINGS. 

LOCATIONS IMPACTED INCLUDE...
GREAT FALLS...CASCADE...FORT SHAW...FORT  SHAW...BLACK EAGLE...
SAND COULEE...FIRST PEOPLES BUFFALO JUMP STATE PARK...TRACY...
SLUICE BOXES STATE PARK...VAUGHN...STOCKETT...CENTERVILLE...
SUN RIVER...ULM...EDEN AND MALMSTROM AFB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4702 11168 4758 11189 4758 11161 4767 11162
      4767 11128 4719 11084
TIME...MOT...LOC 0053Z 253DEG 32KT 4742 11149 

HAIL...<.75IN
WIND...70MPH
 
$$

BRUSDA

042 
WWUS55 KTFX 090121
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
721 PM MDT WED JUN 8 2016

MTC013-090130-
/O.EXP.KTFX.SV.W.0002.000000T0000Z-160609T0130Z/
CASCADE MT-
721 PM MDT WED JUN 8 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CASCADE COUNTY WILL
EXPIRE AT 730 PM MDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER GUSTY
WINDS AROUND 40 MPH ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4702 11168 4758 11189 4758 11161 4767 11162
      4767 11128 4719 11084
TIME...MOT...LOC 0118Z 244DEG 14KT 4742 11149 

$$

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 6:22 PM MDT	Special Weather Statement	TFX	Glacier	38 min
Jun 8, 6:28 PM MDT	Special Weather Statement	TFX	Jefferson	47 min
Jun 8, 6:29 PM MDT	Special Weather Statement	TFX	Teton	31 min
Jun 8, 8:44 PM MDT	Special Weather Statement	TFX	Liberty	31 min
Jun 8, 9:42 PM MDT	Special Weather Statement	TFX	Lewis and Clark	48 min
Jun 9, 1:13 PM MDT	Special Weather Statement	TFX	Fergus	47 min
Jun 9, 1:19 PM MDT	Special Weather Statement	TFX	Judith Basin	41 min
Jun 9, 1:22 PM MDT	Special Weather Statement	TFX	Hill	38 min
Jun 9, 1:22 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	53 min
Jun 9, 1:42 PM MDT	Severe Thunderstorm Warning	TFX	Hill	48 min
Jun 9, 1:43 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin	47 min
Jun 9, 1:55 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	38 min
Jun 9, 2:11 PM MDT	Special Weather Statement	TFX	Meagher	64 min
Jun 9, 2:17 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	37 min
Jun 9, 2:18 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	42 min
Jun 9, 2:24 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	66 min
Jun 9, 2:28 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Cascade, Judith Basin, Meagher	39 min
Jun 9, 2:29 PM MDT	Special Weather Statement	TFX	Petroleum	46 min
Jun 9, 2:31 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	29 min
Jun 9, 2:34 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Cascade, Lewis and Clark, Meagher	56 min
Jun 9, 2:51 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	54 min
Jun 9, 2:57 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	33 min
Jun 9, 3:13 PM MDT	Special Weather Statement	TFX	Blaine	47 min
Jun 9, 3:18 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin	57 min
Jun 9, 3:21 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin, Meagher	54 min
Jun 9, 3:42 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	16 min
Jun 9, 4:12 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	13 min
Jun 9, 4:41 PM MDT	Special Weather Statement	TFX	Meagher	34 min
Jun 9, 5:03 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 9, 5:30 PM MDT	Special Weather Statement	TFX	Petroleum	30 min
Jun 9, 5:43 PM MDT	Special Weather Statement	TFX	Meagher	47 min

Nearby

Severe Thunderstorm Warnings in Montana, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.