575 
WGUS55 KBOI 182321
FFWBOI
IDC015-190215-
/O.NEW.KBOI.FF.W.0012.260918T2321Z-260919T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boise ID
521 PM MDT Fri Sep 18 2026

The National Weather Service in Boise has issued a

* Flash Flood Warning for...
  The Wapiti Burn Area in...
  Northeastern Boise County in southwestern Idaho...

* Until 815 PM MDT.

* At 521 PM MDT, emergency management reported thunderstorms
  producing heavy rain over the Wapiti Burn Area. The expected
  rainfall rate is 0.25 inches in 1 hour. 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. The debris flow can consist
  of rock, mud, vegetation and other loose materials.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding in and around the Wapiti Burn Area.

  SOURCE...Emergency management reported debris on Idaho State
           Highway 21 between mileposts 103 and 105.

  IMPACT...Life threatening flash flooding of areas in and around the
           Wapiti Burn Area.

* Some locations that will experience flash flooding include...
  Warm Springs Guard Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of creeks...streams...and ditches
in the Wapiti Burn Area. Severe debris flows can also be anticipated
across roads. Roads and driveways may be washed away in places. If
you encounter flood waters...climb to safety.

&&

LAT...LON 4417 11528 4414 11533 4413 11534 4412 11533
      4414 11530 4415 11527 4416 11528

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...0.25 INCHES IN 1 HOUR

$$

LC

410 
WGUS75 KBOI 190146
FFSBOI

Flash Flood Statement
National Weather Service Boise ID
746 PM MDT Fri Sep 18 2026

IDC015-190156-
/O.CAN.KBOI.FF.W.0012.000000T0000Z-260919T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boise ID-
746 PM MDT Fri Sep 18 2026

...FLASH FLOOD WARNING FOR THE WAPITI BURN AREA IS CANCELLED FOR
NORTHEASTERN BOISE COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. As of 735 PM MDT Idaho State Comms reports that mud and rocks
on Idaho Highway 21 between mileposts 103 and 105 have been cleared
from the roadway.  Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 1200 AM MDT for portions
of south central and southwest Idaho.


&&

LAT...LON 4416 11528 4415 11527 4414 11530 4412 11533
      4413 11534 4414 11533 4417 11528

$$

LC