Alert archive / Montana / Flash Flood Warnings in 2021
Flash Flood Warning 2, NWS Billings, MT
NWS Billings, MT issued this flash flood warning at Jun 10, 2021, 3:53 PM MDT for Musselshell County, Montana. It was in force for 3 hr. 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 10, 2021, 3:53 PM MDT (21:53 UTC)
- Expired
- Jun 10, 2021, 7:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Billings, MT
- Area
- Storm-based polygon
- Flood severity
- None
County Musselshell County, MT
The radar
The Billings radar (KBLX), 60 km from the middle of the area, began a volume at 21:54 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, 9.9 hours before the alert went out and 208 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
- 1207 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 685 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
308
WGUS55 KBYZ 102153
FFWBYZ
MTC065-110100-
/O.NEW.KBYZ.FF.W.0002.210610T2153Z-210611T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Billings MT
353 PM MDT Thu Jun 10 2021
The National Weather Service in Billings has issued a
* Flash Flood Warning for...
The BobCat Burn Area in...
Central Musselshell County in central Montana...
* Until 700 PM MDT.
* At 353 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the BobCat Burn Area. Up to 0.5 inches of rain
have fallen. The expected rainfall rate is 1 to 2 inches in 2
hours. Flash flooding is ongoing or expected to begin shortly.
Excessive rainfall over the burn scar will result in debris flow
moving through the Halfbreed Creek, East Parrot Creek, Parrot Creek,
West Parrot Creek, Musselshell River, Cow Gulch, Railroad Creek,
Fattig Creek, and Rehder Coulee.
Roads impacted include Highway 87, Beard Road, West Parrot Creek
Road, East Parrot Creek Road, Fattig Creek Road, Rehder Road. The
debris flow can consist of rock, mud, vegetation and other loose
materials.
HAZARD...Flash flooding caused by thunderstorms in and around
the BobCat Burn Area.
SOURCE...Radar.
IMPACT...Flooding of areas in and downstream of the BobCat Burn
Area.
* Some locations that will experience flash flooding include...
Klein.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for flooding of creeks, streams, and normally dry
coulees even in areas not receiving rainfall downstream of the burn
area. These can become raging killer currents in a matter of minutes
even from distant rainfall upstream.
Please report observed flooding to local emergency officials and
request they pass the information to the National Weather Service in
Billings.
&&
LAT...LON 4627 10839 4626 10844 4631 10849 4635 10850
4638 10855 4643 10857 4643 10855 4644 10851
4646 10846 4647 10835 4650 10828 4651 10824
4649 10823 4641 10823 4635 10826 4631 10825
4627 10829 4627 10831 4627 10833 4626 10833
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS
$$
Vertz2 follow-up statements
193
WGUS75 KBYZ 102339
FFSBYZ
Flash Flood Statement
National Weather Service Billings MT
539 PM MDT Thu Jun 10 2021
MTC065-110100-
/O.CON.KBYZ.FF.W.0002.000000T0000Z-210611T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Musselshell MT-
539 PM MDT Thu Jun 10 2021
...FLASH FLOOD WARNING FOR THE BOBCAT BURN AREA REMAINS IN EFFECT
UNTIL 7 PM MDT THIS EVENING FOR CENTRAL MUSSELSHELL COUNTY...
At 539 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain over the BobCat Burn Area. Between 1 and 2.5 inches of rain
have fallen. Additional rainfall amounts up to 0.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
Excessive rainfall over the burn scar will result in debris flow
moving through the Halfbreed Creek, East Parrot Creek, Parrot Creek,
West Parrot Creek, Musselshell River, Cow Gulch, Railroad Creek,
Fattig Creek, and Rehder Coulee.
Roads impacted include Highway 87, Beard Road, West Parrot Creek
Road, East Parrot Creek Road, Fattig Creek Road, Rehder Road. The
debris flow can consist of rock, mud, vegetation and other loose
materials.
HAZARD...Flash flooding caused by thunderstorms in and around the
BobCat Burn Area.
SOURCE...Radar.
IMPACT...Flooding of areas in and downstream of the BobCat Burn
Area.
Some locations that will experience flash flooding include...
Klein.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for flooding of creeks, streams, and normally dry
coulees even in areas not receiving rainfall downstream of the burn
area. These can become raging killer currents in a matter of minutes
even from distant rainfall upstream.
Please report observed flooding to local emergency officials and
request they pass the information to the National Weather Service in
Billings.
&&
LAT...LON 4627 10839 4626 10844 4631 10849 4635 10850
4638 10855 4643 10857 4643 10855 4644 10851
4646 10846 4647 10835 4650 10828 4651 10824
4649 10823 4641 10823 4635 10826 4631 10825
4627 10829 4627 10831 4627 10833 4626 10833
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5 INCHES IN 1 HOUR
$$
Vertz898
WGUS75 KBYZ 110106
FFSBYZ
Flash Flood Statement
National Weather Service Billings MT
706 PM MDT Thu Jun 10 2021
MTC065-110116-
/O.EXP.KBYZ.FF.W.0002.000000T0000Z-210611T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Musselshell MT-
706 PM MDT Thu Jun 10 2021
...FLASH FLOOD WARNING FOR THE BOBCAT BURN AREA HAS EXPIRED FOR
CENTRAL MUSSELSHELL COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat, though light rain showers may still occur over the next
couple hours. Please continue to heed any remaining road closures.
LAT...LON 4627 10839 4626 10844 4631 10849 4635 10850
4638 10855 4643 10857 4643 10855 4644 10851
4646 10846 4647 10835 4650 10828 4651 10824
4649 10823 4641 10823 4635 10826 4631 10825
4627 10829 4627 10831 4627 10833 4626 10833
$$
VertzThe office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 2:53 AM MDT | High Wind Warning | BYZ | Big Horn, Carter, Custer, Fallon, Powder River, Rosebud and 1 more | 23 hr |
| Jun 10, 3:47 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 43 min |
| Jun 10, 4:26 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 109 min |
| Jun 10, 4:29 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 61 min |
| Jun 10, 5:19 PM MDT | Special Weather Statement | BYZ | Yellowstone | 11 min |
| Jun 10, 5:28 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Rosebud | 47 min |
| Jun 10, 5:30 PM MDT | Special Weather Statement | BYZ | Yellowstone | 30 min |
| Jun 10, 5:57 PM MDT | Special Weather Statement | BYZ | Yellowstone | 48 min |
| Jun 10, 5:58 PM MDT | Special Weather Statement | BYZ | Treasure | 47 min |
Nearby
Flash Flood Warnings in Montana, 2021Every flash flood 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.