Much of central MT has already seen 1 to 2 of precipitation with locally higher amounts in central/northern Lewis and Clark County. An additional 0.5 to 1 of rainfall likely for the western portions of central Montana. Expect some flooding impacts to develop in the area highlighted by the Flood Watch along smaller creeks and streams and adjacent roadways as well as in lower lying areas where water collects. The Dearborn River is likely to see the sharpest increase, and will be closely monitored with latest forecasts projecting a rise to flood stage near Craig. The Sun, Teton and Marias Rivers will likely also rise, though not as sharply as the Dearborn.

Flood in LEWIS AND CLARK, MONTANA
From 30-JUN-20 03:15:00 to 30-JUN-20 13:18:00 (MST-7)
Location: CRAIG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

At 3:15 AM MDT Tuesday the stage was 5.8 feet.
Flood stage is 6.5 feet.
Minor flooding is forecast.
Forecast...The river is expected to rise above flood stage late morning to a crest of 6.6 feet.
It then falls below flood stage just after midnight.
Impact...At 6.5 feet, River coming out of banks within reach of USGS gage, flooding field to north of river and west of Highway 287.
Flood History...This crest compares to a previous crest of 6.4 feet on 06/16/1950.
At 12:15 PM MDT Tuesday the stage was 5.7 feet.
Flood stage is 6.5 feet.
Forecast...The Dearborn River has crested, and should continue to slowly fall through Wednesday.

Heavy Rain in CASCADE, MONTANA
From 29-JUN-20 05:30:00 to 29-JUN-20 05:30:00 (MST-7)
Location: GREAT FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy Rain in LEWIS AND CLARK, MONTANA
From 29-JUN-20 07:43:00 to 29-JUN-20 07:43:00 (MST-7)
Location: AUSTIN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Total since Saturday 2 PM. Currently raining lightly.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 29-JUN-20 08:00:00 to 29-JUN-20 08:00:00 (MST-7)
Location: WOLF CREEK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Estimates an additional 0.5 inches fell since 9 AM.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 29-JUN-20 08:00:00 to 29-JUN-20 08:00:00 (MST-7)
Location: AUGUSTA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in CASCADE, MONTANA
From 29-JUN-20 10:57:00 to 29-JUN-20 10:57:00 (MST-7)
Location: ULM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Steady rain.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 29-JUN-20 13:30:00 to 29-JUN-20 13:30:00 (MST-7)
Location: AUSTIN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Morning rainfall report update.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 29-JUN-20 15:30:00 to 29-JUN-20 15:30:00 (MST-7)
Location: HOLTER DAM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

CO-OP observer station hltm8, Holter Dam CO-OP. 48 hour total.

Heavy Rain in CASCADE, MONTANA
From 29-JUN-20 20:00:00 to 29-JUN-20 20:00:00 (MST-7)
Location: ULM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Since 5 PM on 6/28 through 10 PM pm 6/29, 2.88 inches fell. 0.44 inches fell between 4 PM and 9PM, today.

Heavy Rain in CASCADE, MONTANA
From 30-JUN-20 06:00:00 to 30-JUN-20 06:00:00 (MST-7)
Location: ULM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Three-day rainfall report. Weather underground report.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 06:00:00 to 30-JUN-20 06:00:00 (MST-7)
Location: IRON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Cocorahs station mt-lc-11 9 nne Helena cocorahs.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 06:00:00 to 30-JUN-20 06:00:00 (MST-7)
Location: WOLF CREEK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Three-day rainfall report. Weather underground report.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 06:00:00 to 30-JUN-20 06:00:00 (MST-7)
Location: AUGUSTA ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Three-day rainfall report. Weather underground report.

Heavy Rain in CASCADE, MONTANA
From 30-JUN-20 08:00:00 to 30-JUN-20 08:00:00 (MST-7)
Location: ULM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in CASCADE, MONTANA
From 30-JUN-20 08:06:00 to 30-JUN-20 08:06:00 (MST-7)
Location: EDEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

June 28th through June 30th.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 12:29:00 to 30-JUN-20 12:29:00 (MST-7)
Location: CANYON FERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station tt236 Helena portable no.2.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 13:00:00 to 30-JUN-20 13:00:00 (MST-7)
Location: LINCOLN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station nvrm8 11.3 se Lincoln.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 13:00:00 to 30-JUN-20 13:00:00 (MST-7)
Location: AUGUSTA ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station wodm8 20.0 w Augusta.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 13:47:00 to 30-JUN-20 13:47:00 (MST-7)
Location: BROADWATER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station ts911 Helena 3sw raws - Portable.

Heavy Rain in LEWIS AND CLARK, MONTANA
From 30-JUN-20 13:53:00 to 30-JUN-20 13:53:00 (MST-7)
Location: (HLN)HELENA RGNL ARP
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station Helena khln ap asos.

Heavy Rain in CASCADE, MONTANA
From 30-JUN-20 14:15:00 to 30-JUN-20 14:15:00 (MST-7)
Location: (GTF)GREAT FALLS ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station Great Falls kgtf.

Heavy Rain in CASCADE, MONTANA
From 30-JUN-20 17:00:00 to 30-JUN-20 17:00:00 (MST-7)
Location: ULM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Storm total as of Tuesday evening. Report via facebook.