National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
WGUS85 KPIH 221847
FLSPIH

Flood Statement
National Weather Service Pocatello ID
1247 PM MDT Mon Apr 22 2024

...The Flood Warning continues for the following rivers in Idaho...

  Portneuf River at Pocatello affecting Bannock County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Caution is urged when walking near riverbanks.

Motorists should not attempt to drive around barricades or drive
cars through flooded areas.

Additional information is available at www.weather.gov/pocatello.

&&

IDC005-231900-
/O.CON.KPIH.FL.W.0001.000000T0000Z-000000T0000Z/
/PIHI1.2.SM.240405T1000Z.240428T1200Z.000000T0000Z.NO/
1247 PM MDT Mon Apr 22 2024

...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...

* WHAT...Minor flooding is occurring and moderate flooding is
  forecast.

* WHERE...Portneuf River at Pocatello.

* WHEN...Until further notice.

* IMPACTS...At 8.5 feet, Sections of Sacajawea Park will be under
  water and the trail is usually closed at this level. Marsh Creek
  near Inkom may also be over its banks.
  At 9.2 feet, Flooding of low lying agricultural land and pasture
  will occur in the Inkom and Blackrock area. Lowland flooding is
  likely along sections of the river between Portneuf Gap and the
  Cheyenne Avenue Bridge in Pocatello.
  At 9.4 feet, Water will encroach around sitting benches near the
  river at the Pacific Recycling Trailhead.
  At 10.0 feet, Significant flooding of agricultural land will occur
  from the Inkom and Blackrock area. Lowland flooding will occur
  along sections of the river in Pocatello from Portneuf Gap to the
  Cheyenne Avenue Bridge and downstream of the concrete channel
  beginning at Sacajawea Park.


* ADDITIONAL DETAILS...
  - At 11:45 AM MDT Monday the stage was 9.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours
    ending at 11:45 AM MDT Monday was 9.8 feet.
  - Forecast...The river is expected to rise to a crest of 10.0
    feet tomorrow morning. It will then rise to 10.4 feet Sunday
    morning. Additional rises are possible thereafter.
  - Flood stage is 8.5 feet.
  - Flood History...This crest compares to a previous crest of
    10.5 feet on 01/11/1982.
  - http://www.weather.gov/safety/flood

&&

              Fld   Observed           Forecasts (12 pm MDT)
Location      Stg   Stg   Day/Time     Tue   Wed   Thu

Portneuf River
Pocatello     8.5   9.8   Mon 11 am MD 10.0  10.0  10.1


&&

LAT...LON 4294 11262 4298 11250 4283 11236 4281 11223
      4275 11232 4277 11241


$$

TW