166 
WGUS55 KGJT 131850
FFWGJT
COC077-132145-
/O.NEW.KGJT.FF.W.0092.260813T1850Z-260813T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Grand Junction CO
1250 PM MDT Thu Aug 13 2026

The National Weather Service in Grand Junction has issued a

* Flash Flood Warning for...
  Southwestern Mesa County in west central Colorado...

* Until 345 PM MDT.

* At 1250 PM MDT, Doppler radar indicated thunderstorms producing
  heavy rain in John Brown Canyon. Between 0.5 and 1 inch of rain has
  fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
  Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of creeks and streams, highways, county
           roads and underpasses/culverts.

* Some locations that will experience flash flooding include...
  Mainly rural areas of Southwestern Mesa County, west of Gateway,
  including John Brown Canyon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging currents in a matter
of minutes, even from distant rainfall.

Immediately climb to higher ground. Runoff concentrated through
narrow canyon walls can quickly become dangerous, life threatening
conditions.

&&

LAT...LON 3868 10898 3866 10903 3862 10906 3859 10904
      3865 10897 3868 10897

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

247 
WGUS75 KGJT 132137
FFSGJT

Flash Flood Statement
National Weather Service Grand Junction CO
337 PM MDT Thu Aug 13 2026

COC077-132147-
/O.EXP.KGJT.FF.W.0092.000000T0000Z-260813T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mesa CO-
337 PM MDT Thu Aug 13 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MDT THIS AFTERNOON FOR
SOUTHWESTERN MESA COUNTY...

Excess runoff from heavy rain has ended over the warned area. If
flooding has been observed...Please report it to your local law
enforcement agency. Flooding is no longer expected to pose a threat.
Please continue to heed remaining road closures.

&&

LAT...LON 3868 10898 3866 10903 3862 10906 3859 10904
      3865 10897 3868 10897

$$

BS