Flood Warning for Dempsey, Idaho
Flood Statement
National Weather Service Pocatello ID
1221 PM MDT Mon May 20 2024
...The Flood Warning is extended for the following rivers in Idaho...
Portneuf River at Pocatello affecting Bannock County.
.River flows will remain elevated due to snowmelt from warmer
temperatures the last couple of day, though overall river flow will
slightly decrease in the upcoming days due to a diminishing snowpack
and cooler temperatures.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov/pocatello.
IDC005-212100-
/O.EXT.KPIH.FL.W.0001.000000T0000Z-000000T0000Z/
/PIHI1.2.SM.240405T1000Z.240515T1645Z.240528T1706Z.NO/
1221 PM MDT Mon May 20 2024
...FLOOD WARNING FOR SNOWMELT NOW IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast,
though overall snowmelt and resulting flows looks to gradually
decrease due to a diminishing snowpack.
* WHERE...Portneuf River at Pocatello.
* WHEN...Until further notice.
* IMPACTS...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.
* ADDITIONAL DETAILS...
- At 11:45 AM MDT Monday the stage was 9.2 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 11:45 AM MDT Monday was 9.4 feet.
- Forecast...River levels should recede slowly over the
upcoming week but the river will likely remain above flood
stage into the weekend.
- Flood stage is 8.5 feet.
- Flood History...This crest compares to a previous crest of
9.1 feet on 05/20/1997.
- 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 9.2 Mon 11 am MD 9.1 8.9 9.0
LAT...LON 4294 11262 4298 11250 4283 11236 4281 11223
4275 11232 4277 11241
Flood Advisory for Dempsey, Idaho
Flood Advisory
National Weather Service Pocatello ID
1222 PM MDT Mon May 20 2024
...The Flood Advisory continues for the following rivers in Idaho...
Portneuf River at Topaz affecting Bannock County.
.River flows will remain elevated from warmer temperatures the last
couple of days, though the overall river flow will slowly decrease
in the upcoming days due to cooler temperatures and a diminishing
snowpack.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you are in the advisory area, remain alert to possible flooding
or the possibility of the advisory being upgraded to a warning.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov/pocatello.
IDC005-212100-
/O.CON.KPIH.FL.Y.0003.000000T0000Z-000000T0000Z/
/TOPI1.N.SM.000000T0000Z.000000T0000Z.000000T0000Z.NR/
1222 PM MDT Mon May 20 2024
...FLOOD ADVISORY FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Flooding caused by snowmelt continues.
* WHERE...Portneuf River at Topaz.
* WHEN...Until further notice.
* IMPACTS...At 4.0 feet, Lowland and crop field flooding possible
from Pebble Creek to Inkom.
* ADDITIONAL DETAILS...
- At 11:15 AM MDT Monday the stage was 4.0 feet.
- Forecast...The river continue to hovers near flood stage and
will continue to do so for the next few days.
- Action stage is 3.5 feet.
- Flood stage is 4.0 feet.
- http://www.weather.gov/safety/flood
Fld Observed Forecasts (12 pm MDT)
Location Stg Stg Day/Time Tue Wed Thu
Portneuf River
Topaz 4.0 4.0 Mon 11 am MD 3.9 3.8 3.9
LAT...LON 4275 11232 4281 11223 4265 11206 4287 11202
4287 11185 4248 11203