Alert archive / Montana / Special Weather Statements in 2021
Special Weather Statement, NWS Great Falls, MT
NWS Great Falls, MT issued this special weather statement at Jul 6, 2021, 4:21 PM MDT for Glacier County, Montana. It was in force for 24 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
- Jul 6, 2021, 4:21 PM MDT (22:21 UTC)
- Expired
- Jul 6, 2021, 4:45 PM MDT
- In force
- 24 min
- Issued by
- NWS Great Falls, MT
County Glacier County, MT
The radar
The Great Falls radar (KTFX), 194 km from the middle of the area, began a volume at 22:24 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, 10.4 hours before the alert went out and 231 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.
- Mixed-layer CAPE
- 103 J/kg
- Mixed-layer CIN
- -251 J/kg
- Mixed-layer LCL
- 1154 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
035
WWUS85 KTFX 062221
SPSTFX
Special Weather Statement
National Weather Service Great Falls MT
421 PM MDT Tue Jul 6 2021
MTZ010-062245-
Eastern Glacier MT-
421 PM MDT Tue Jul 6 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GLACIER COUNTY UNTIL
445 PM MDT...
At 420 PM MDT, Doppler radar was tracking a strong thunderstorm 25
miles north of North Browning, or 31 miles northwest of Cut Bank,
moving east at 15 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could blow around unsecured objects. Minor
damage to outdoor objects is possible.
This storm will remain over mainly rural areas of northeastern
Glacier County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
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.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4899 11288 4900 11250 4875 11256 4889 11296
4900 11294
TIME...MOT...LOC 2220Z 279DEG 14KT 4893 11285
$$
RCGThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 6:29 PM MDT | Special Weather Statement | TFX | Gallatin, Madison | 31 min |
| Jul 5, 7:04 PM MDT | Special Weather Statement | TFX | Gallatin | 26 min |
| Jul 5, 7:47 PM MDT | Special Weather Statement | TFX | Beaverhead | 28 min |
| Jul 5, 9:16 PM MDT | Special Weather Statement | TFX | Glacier | 44 min |
| Jul 5, 9:57 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 33 min |
| Jul 5, 10:25 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 50 min |
| Jul 5, 11:12 PM MDT | Special Weather Statement | TFX | Toole | 63 min |
| Jul 6, 12:14 AM MDT | Special Weather Statement | TFX | Liberty | 61 min |
| Jul 6, 12:42 AM MDT | Special Weather Statement | TFX | Chouteau | 33 min |
| Jul 6, 1:15 AM MDT | Special Weather Statement | TFX | Liberty | 60 min |
| Jul 6, 1:18 AM MDT | Special Weather Statement | TFX | Chouteau | 27 min |
| Jul 6, 1:44 AM MDT | Special Weather Statement | TFX | Chouteau | 46 min |
| Jul 6, 2:22 AM MDT | Special Weather Statement | TFX | Chouteau | 38 min |
| Jul 6, 3:00 AM MDT | Special Weather Statement | TFX | Chouteau | 45 min |
| Jul 6, 3:42 AM MDT | Special Weather Statement | TFX | Fergus | 33 min |
| Jul 6, 4:15 AM MDT | Special Weather Statement | TFX | Fergus | 45 min |
| Jul 6, 3:37 PM MDT | Special Weather Statement | TFX | Glacier | 23 min |
| Jul 6, 3:55 PM MDT | Special Weather Statement | TFX | Glacier | 35 min |
| Jul 6, 4:27 PM MDT | Special Weather Statement | TFX | Musselshell | 33 min |
| Jul 6, 4:37 PM MDT | Special Weather Statement | TFX | Fergus | 23 min |
| Jul 6, 4:40 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 35 min |
| Jul 6, 4:42 PM MDT | Special Weather Statement | TFX | Blaine | 33 min |
| Jul 6, 5:14 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 31 min |
| Jul 6, 5:15 PM MDT | Special Weather Statement | TFX | Blaine | 30 min |
| Jul 6, 5:45 PM MDT | Special Weather Statement | TFX | Toole | 30 min |
| Jul 6, 5:46 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 29 min |
Nearby
Special Weather Statements in Montana, 2021Every special weather statement in 2021
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.