425 
WGUS85 KBYZ 122009
FLSBYZ

Flood Advisory
National Weather Service Billings MT
209 PM MDT Wed Aug 12 2026

MTC011-122315-
/O.NEW.KBYZ.FA.Y.0027.260812T2009Z-260812T2315Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carter MT-
209 PM MDT Wed Aug 12 2026

...FLOOD ADVISORY IN EFFECT UNTIL 515 PM MDT THIS AFTERNOON...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Northwestern Carter County in southeastern Montana...

* WHEN...Until 515 PM MDT.

* IMPACTS...Rises in small streams and normally dry arroyos. Water
  over roadways. Overflowing poor drainage areas.

* ADDITIONAL DETAILS...
  - At 209 PM MDT, Doppler radar indicated heavy rain due to
    thunderstorms. Minor flooding is ongoing or expected to begin
    shortly in the advisory area. Between 1 and 2.5 inches of rain
    have fallen.
  - Some locations that will experience flooding include...
    Mainly rural areas of Northwestern Carter County.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles. Do not drive on or attempt to cross flooded
roads, find an alternate route. Roads and driveways may be damaged or
washed out in places.

Be aware of your surroundings and do not drive on flooded roads.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 4590 10494 4593 10473 4578 10459 4569 10457
      4551 10462 4549 10498 4579 10498 4579 10494


$$

McKeown-Robbie

758 
WGUS85 KBYZ 122127
FLSBYZ

Flood Advisory
National Weather Service Billings MT
327 PM MDT Wed Aug 12 2026

MTC011-122315-
/O.CON.KBYZ.FA.Y.0027.000000T0000Z-260812T2315Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carter MT-
327 PM MDT Wed Aug 12 2026

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 515 PM MDT THIS
AFTERNOON...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Northwestern Carter County in southeastern Montana...

* WHEN...Until 515 PM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
  Overflowing poor drainage areas. River or stream flows are
  elevated.

* ADDITIONAL DETAILS...
  - At 325 PM MDT, Doppler radar indicated heavy rain due to
    thunderstorms. Minor flooding is ongoing or expected to begin
    shortly in the advisory area. Between 1 and 3 inches of rain have
    fallen.
  - Additional rainfall amounts up to 0.5 inches are expected over
    the area. This additional rain will result in minor flooding.
  - Some locations that will experience flooding include...
    Mainly rural areas of Northwestern Carter County.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles. Do not drive on or attempt to cross flooded
roads, find an alternate route. Roads and driveways may be damaged or
washed out in places.

&&

LAT...LON 4590 10494 4593 10473 4578 10459 4569 10457
      4551 10462 4549 10498 4579 10498 4579 10494


$$

McKeown-Robbie

900 
WGUS85 KBYZ 122306
FLSBYZ

Flood Advisory
National Weather Service Billings MT
506 PM MDT Wed Aug 12 2026

MTC011-122316-
/O.EXP.KBYZ.FA.Y.0027.000000T0000Z-260812T2315Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carter MT-
506 PM MDT Wed Aug 12 2026

...FLOOD ADVISORY WILL EXPIRE AT 515 PM MDT THIS AFTERNOON...

The Flood Advisory will expire at 515 PM MDT this afternoon for a
portion of southeast Montana, including the following area, Carter.

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4590 10494 4593 10473 4578 10459 4569 10457
      4551 10462 4549 10498 4579 10498 4579 10494


$$

Stetzer