Alert archive / Montana / Special Weather Statements in 2018

Special Weather Statement, NWS Great Falls, MT

June 9, 2018Glacier County, Montana

NWS Great Falls, MT issued this special weather statement at Jun 9, 2018, 3:13 PM MDT for Glacier County, Montana. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 9, 2018, 3:13 PM MDT (21:13 UTC)
Expired: Jun 9, 2018, 3:30 PM MDT
In force: 17 min
Issued by: NWS Great Falls, MT

County Glacier County, MT

The radar

The Great Falls radar (KTFX), 181 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.

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 9.2 hours before the alert went out and 211 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: 12 J/kg
Mixed-layer CIN: -295 J/kg
Mixed-layer LCL: 2250 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, 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 this special weather statement went out at Jun 9, 3:01 PM MDT, 12 minutes earlier.

Area forecast discussion, Jun 9, 3:01 PM MDT, 12 minutes before

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In the hours before

Special weather statement, Jun 9, 2:09 PM MDT, 1 hour 4 minutes before

Special Weather Statement
National Weather Service Great Falls MT
209 PM MDT SAT JUN 9 2018

MTZ009-010-092045-
Northern Rocky Mountain Front-Eastern Glacier-
209 PM MDT SAT JUN 9 2018

...A STRONG THUNDERSTORM WILL AFFECT EASTERN GLACIER COUNTY...

At 209 PM MDT, a strong thunderstorm was located 8 miles north of
Heart Butte, or 25 miles southwest of Cut Bank, moving north at 55
mph.

Wind gusts of 50 to 55 mph and nickel size hail are possible with
this storm.

This storm will remain over mainly rural areas of south central
Northern Rocky Mountain Front and central Eastern Glacier Counties.

This includes the following highways...
 Highway 2 between mile markers 227 and 247.
 Highway 89 between mile markers 94 and 108.

LAT...LON 4832 11271 4832 11294 4893 11289 4886 11233
TIME...MOT...LOC 2009Z 194DEG 47KT 4841 11277

KJ

Special weather statement, Jun 9, 2:25 PM MDT, 48 minutes before

Special Weather Statement
National Weather Service Great Falls MT
225 PM MDT SAT JUN 9 2018

MTZ009-010-046-048-092100-
Southern Rocky Mountain Front-Northern Rocky Mountain Front-Eastern
Glacier-Eastern Pondera-
225 PM MDT SAT JUN 9 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN LEWIS AND CLARK...
WEST CENTRAL PONDERA...AND NORTHWESTERN TETON COUNTIES...

At 224 PM MDT, a strong thunderstorm was located 34 miles south of
Heart Butte, or 41 miles west of Choteau, moving northeast at 50 mph.

Wind gusts of 50 to 55 mph and nickel size hail are possible with
this storm.

Locations impacted include...
Heart Butte.

This includes Highway 89 between mile markers 79 and 84.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4792 11309 4795 11299 4795 11292 4798 11288
      4801 11289 4804 11295 4806 11294 4808 11299
      4812 11299 4812 11305 4814 11308 4831 11302
      4831 11246 4777 11296 4779 11307
TIME...MOT...LOC 2024Z 212DEG 45KT 4781 11308

KJ

Special weather statement, Jun 9, 2:47 PM MDT, 26 minutes before

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Special weather statement, Jun 9, 2:59 PM MDT, 14 minutes before

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Special weather statement, Jun 9, 3:03 PM MDT, 10 minutes before

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Special weather statement, Jun 9, 3:13 PM MDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 7:00 PM MDT	Special Weather Statement	TFX	Broadwater	30 min
Jun 8, 7:26 PM MDT	Special Weather Statement	TFX	Gallatin	34 min
Jun 9, 11:25 AM MDT	Winter Weather Advisory	TFX		22 hr
Jun 9, 12:52 PM MDT	Special Weather Statement	TFX	Glacier	23 min
Jun 9, 2:09 PM MDT	Special Weather Statement	TFX	Glacier	36 min
Jun 9, 2:25 PM MDT	Special Weather Statement	TFX	Teton	35 min
Jun 9, 2:37 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Pondera, Teton	23 min
Jun 9, 2:47 PM MDT	Special Weather Statement	TFX	Ravalli	13 min
Jun 9, 2:59 PM MDT	Special Weather Statement	TFX	Pondera	46 min
Jun 9, 3:03 PM MDT	Special Weather Statement	TFX	Teton	27 min
Jun 9, 3:21 PM MDT	Special Weather Statement	TFX	Glacier	24 min
Jun 9, 3:31 PM MDT	Special Weather Statement	TFX	Teton	14 min
Jun 9, 3:58 PM MDT	Special Weather Statement	TFX	Pondera	32 min
Jun 9, 4:09 PM MDT	Special Weather Statement	TFX	Toole	21 min
Jun 9, 4:29 PM MDT	Special Weather Statement	TFX	Toole	16 min
Jun 9, 5:10 PM MDT	Special Weather Statement	TFX	Judith Basin	35 min
Jun 9, 5:53 PM MDT	Special Weather Statement	TFX	Judith Basin	37 min

Nearby

Special Weather Statements in Montana, 2018 Every special weather statement in 2018

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.