Alert archive / Montana / Fire Weather Watches in 2021
Fire Weather Watch 5, NWS Great Falls, MT
NWS Great Falls, MT issued this fire weather watch at Jul 20, 2021, 2:04 PM MDT for 11 counties in Montana. It took effect at Jul 22, 2021, 12:00 PM MDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jul 20, 2021, 2:04 PM MDT (20:04 UTC)
- In effect from
- Jul 22, 2021, 12:00 PM MDT
- Expired
- Jul 21, 2021, 1:26 PM MDT
- In force
- Issued by
- NWS Great Falls, MT
Counties Blaine County, MT, Glacier County, MT, Hill County, MT, Jefferson County, MT, Lewis and Clark County, MT, Liberty County, MT, Phillips County, MT, Pondera County, MT, Powell County, MT, Teton County, MT, Toole County, MT
The radar
The Great Falls radar (KTFX), 55 km from the middle of the area, began a volume at 20:04 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, 8.1 hours before the alert went out and 77 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1591 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this fire weather watch 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 fire weather watch went out at Jul 20, 11:48 AM MDT, 2 hours 16 minutes earlier.
Area forecast discussion, Jul 20, 11:48 AM MDT, 2 hours 16 minutes before
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</html>In the hours before
Special weather statement, Jul 20, 1:12 PM MDT, 52 minutes before
Special Weather Statement National Weather Service Great Falls MT 112 PM MDT Tue Jul 20 2021 MTZ008-015-052-202130- Beaverhead-Madison-Jefferson- Including the cities of Big Hole Pass, Wisdom, Dillon, Chief Joseph Pass, Monida Pass, Wise River, Ennis, Norris Hill, Raynolds Pass, Twin Bridges, Virginia City, Montana City, Boulder, Boulder Hill, Elk Park Pass, Homestake Pass, and Whitehall 112 PM MDT Tue Jul 20 2021 ...Scattered Thunderstorms Developing This Afternoon... Scattered thunderstorms are developing and becoming more widespread this afternoon across portions of Beaverhead, Madison and Jefferson counties. Thunderstorms are drifting from the southwest toward the northeast at around 10 mph. Expect locally heavy rainfall, with up to one-half inch possible. Have a plan to seek shelter indoors from lightning if a thunderstorm moves toward your location.
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:38 PM MDT | Special Weather Statement | TFX | Broadwater | 22 min |
| Jul 20, 2:56 PM MDT | Special Weather Statement | TFX | Madison | 34 min |
| Jul 20, 3:14 PM MDT | Special Weather Statement | TFX | Madison | 31 min |
| Jul 20, 3:35 PM MDT | Special Weather Statement | TFX | Deer Lodge | 25 min |
| Jul 20, 3:54 PM MDT | Special Weather Statement | TFX | Madison | 36 min |
| Jul 20, 4:21 PM MDT | Special Weather Statement | TFX | Gallatin | 24 min |
| Jul 20, 4:24 PM MDT | Special Weather Statement | TFX | Gallatin | 36 min |
| Jul 20, 5:11 PM MDT | Special Weather Statement | TFX | Broadwater | 34 min |
| Jul 20, 5:16 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 29 min |
| Jul 20, 5:47 PM MDT | Special Weather Statement | TFX | Lewis and Clark, Meagher | 28 min |
| Jul 20, 5:53 PM MDT | Special Weather Statement | TFX | Jefferson | 37 min |
Nearby
Fire Weather Watches in Montana, 2021Every fire weather watch 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.