Alert archive / Montana / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Billings, MT
NWS Billings, MT issued this flash flood warning at Jun 5, 2021, 4:03 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 5, 2021, 4:03 PM MDT (22:03 UTC)
- Expired
- Jun 5, 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 22:04 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, 10.1 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
- 3187 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
290
WGUS55 KBYZ 052203
FFWBYZ
MTC065-060100-
/O.NEW.KBYZ.FF.W.0001.210605T2203Z-210606T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Billings MT
403 PM MDT Sat Jun 5 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 403 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain approaching the BobCat Burn Area. The expected rainfall
rate is 0.5 to 1 inch in 1 hour. Flash flooding is possible
shortly.
Excessive rainfall over the burn scar may 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 that may be 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.
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...0.5-1 INCH IN 1 HOUR
$$
Palmquist2 follow-up statements
926
WGUS75 KBYZ 052331
FFSBYZ
Flash Flood Statement
National Weather Service Billings MT
531 PM MDT Sat Jun 5 2021
MTC065-060100-
/O.CON.KBYZ.FF.W.0001.000000T0000Z-210606T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Musselshell MT-
531 PM MDT Sat Jun 5 2021
...FLASH FLOOD WARNING FOR THE BOBCAT BURN AREA REMAINS IN EFFECT
UNTIL 7 PM MDT THIS EVENING FOR CENTRAL MUSSELSHELL COUNTY...
At 531 PM MDT, Thunderstorms have produced heavy rain over the
BobCat Burn Area. Radar estimates of up to an inch of rain has
fallen in a short amount of time. Flash flooding is possible.
Excessive rainfall over the burn scar may result in debris flow
moving through the Halfbreed Creek, East Parrot Creek, Parrot Creek,
West Parrot Creek, Musselshell River, Cow Gulch, Railroad Creek,
Fattig Creek, and Rehder Coulee.
Roads that may be impacted include Highway 87, Beard Road, West
Parrot Creek Road, East Parrot Creek Road, Fattig Creek Road, Rehder
Road. The debris flow can consist of rock, mud, vegetation and other
loose materials.
HAZARD...Flash flooding caused by thunderstorms in and around the
BobCat Burn Area.
SOURCE...Radar.
IMPACT...Flooding of areas in and downstream of the BobCat Burn
Area.
Some locations that may experience flash flooding include...
Klein.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for flooding of creeks, streams, and normally dry
coulees even in areas not receiving rainfall downstream of the burn
area.
Please report observed flooding to local emergency officials and
request they pass the information to the National Weather Service in
Billings.
&&
LAT...LON 4627 10839 4626 10844 4631 10849 4635 10850
4638 10855 4643 10857 4643 10855 4644 10851
4646 10846 4647 10835 4650 10828 4651 10824
4649 10823 4641 10823 4635 10826 4631 10825
4627 10829 4627 10831 4627 10833 4626 10833
FLASH FLOOD...RADAR INDICATED
$$
Palmquist302
WGUS75 KBYZ 060102
FFSBYZ
Flash Flood Statement
National Weather Service Billings MT
702 PM MDT Sat Jun 5 2021
MTC065-060112-
/O.EXP.KBYZ.FF.W.0001.000000T0000Z-210606T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Musselshell MT-
702 PM MDT Sat Jun 5 2021
...FLASH FLOOD WARNING FOR THE BOBCAT BURN AREA HAS EXPIRED FOR
CENTRAL MUSSELSHELL COUNTY...
Flooding and debris flow is no longer expected to pose a threat.
Please continue to use caution and remain alert, especially
overnight, for debris and water on roadways.
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
$$
TesarThe office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 9:00 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 30 min |
| Jun 4, 9:19 PM MDT | Special Weather Statement | BYZ | Wheatland | 26 min |
| Jun 4, 9:51 PM MDT | Special Weather Statement | BYZ | Park | 39 min |
| Jun 4, 10:28 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 32 min |
| Jun 4, 11:24 PM MDT | Special Weather Statement | BYZ | Wheatland | 36 min |
| Jun 4, 11:41 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 34 min |
| Jun 5, 2:26 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 34 min |
| Jun 5, 3:50 PM MDT | Special Weather Statement | BYZ | Musselshell | 40 min |
| Jun 5, 4:14 PM MDT | Special Weather Statement | BYZ | Yellowstone | 31 min |
| Jun 5, 4:44 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 31 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.