Alert archive / Montana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 16, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 24, 2021, 4:55 PM MDT for Fergus County, Judith Basin County, Montana. It was in force for 35 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 24, 2021, 4:55 PM MDT (22:55 UTC)
- Expired
- Jun 24, 2021, 5:30 PM MDT
- In force
- 35 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Fergus County, MT, Judith Basin County, MT
The radar
The Billings radar (KBLX), 123 km from the middle of the area, began a volume at 22:55 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, 10.9 hours before the alert went out and 112 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
- 10 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 2437 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
262
WUUS55 KTFX 242255
SVRTFX
MTC027-045-242330-
/O.NEW.KTFX.SV.W.0016.210624T2255Z-210624T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Great Falls MT
455 PM MDT Thu Jun 24 2021
The National Weather Service in Great Falls has issued a
* Severe Thunderstorm Warning for...
Southeastern Judith Basin County in central Montana...
South central Fergus County in central Montana...
* Until 530 PM MDT.
* At 453 PM MDT, a severe thunderstorm was located 16 miles south of
Moore, or 21 miles north of Harlowton, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Buffalo and Garneill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Great Falls.
&&
LAT...LON 4675 10938 4670 10939 4669 10945 4670 10982
4676 10999 4694 10968 4675 10925
TIME...MOT...LOC 2253Z 311DEG 26KT 4674 10972
HAIL...1.00IN
WIND...60MPH
$$
TPP1 follow-up statement
526
WWUS55 KTFX 242321
SVSTFX
Severe Weather Statement
National Weather Service Great Falls MT
521 PM MDT Thu Jun 24 2021
MTC027-045-242330-
/O.EXP.KTFX.SV.W.0016.000000T0000Z-210624T2330Z/
Judith Basin MT-Fergus MT-
521 PM MDT Thu Jun 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JUDITH BASIN AND
SOUTH CENTRAL FERGUS COUNTIES WILL EXPIRE AT 530 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Great Falls.
LAT...LON 4675 10938 4670 10939 4669 10945 4670 10982
4676 10999 4694 10968 4675 10925
TIME...MOT...LOC 2320Z 311DEG 26KT 4662 10952
$$
TPPThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 2:05 PM MDT | Special Weather Statement | TFX | Cascade | 40 min |
| Jun 24, 3:57 PM MDT | Special Weather Statement | TFX | Teton | 33 min |
| Jun 24, 4:07 PM MDT | Special Weather Statement | TFX | Meagher | 23 min |
| Jun 24, 4:25 PM MDT | Special Weather Statement | TFX | Teton | 35 min |
| Jun 24, 4:29 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 31 min |
| Jun 24, 5:16 PM MDT | Special Weather Statement | TFX | Fergus | 44 min |
| Jun 24, 5:29 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 31 min |
| Jun 24, 5:59 PM MDT | Severe Thunderstorm Warning | TFX | Fergus | 31 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2021Every severe thunderstorm warning 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.