Flood Warning for Topaz, Idaho
Flood Statement
National Weather Service Pocatello ID
1222 PM MDT Fri May 17 2024
...The Flood Warning continues for the following rivers in Idaho...
Portneuf River at Pocatello affecting Bannock County.
.Warm temperatures will melt high mountain snowpack and keep river
flows elevated, though overall river flow is slightly decreasing due
to a diminishing snowpack.
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.
IDC005-182000-
/O.CON.KPIH.FL.W.0001.000000T0000Z-240525T0900Z/
/PIHI1.2.SM.240405T1000Z.240515T1645Z.240525T1949Z.NO/
1222 PM MDT Fri May 17 2024
...FLOOD WARNING FOR SNOWMELT REMAINS IN EFFECT UNTIL SATURDAY, MAY
25...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Portneuf River at Pocatello.
* WHEN...Until Saturday, May 25.
* IMPACTS...At 8.0 feet, Water will encroach onto portions of the
bike and walking trail next to the river in Sacajawea Park in
Pocatello.
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.
* ADDITIONAL DETAILS...
- At 10:45 AM MDT Friday the stage was 9.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:45 AM MDT Friday was 9.6 feet.
- Forecast...The river is expected to fall below flood stage
Saturday, May 25 and continue falling to 8.3 feet Monday, May
27.
- Flood stage is 8.5 feet.
- Flood History...This crest compares to a previous crest of
9.4 feet on 04/26/1986.
- http://www.weather.gov/safety/flood
Fld Observed Forecasts (12 pm MDT)
Location Stg Stg Day/Time Sat Sun Mon
Portneuf River
Pocatello 8.5 9.5 Fri 10 am MD 9.4 9.3 9.2
LAT...LON 4294 11262 4298 11250 4283 11236 4281 11223
4275 11232 4277 11241
Flood Advisory for Topaz, Idaho
Flood Advisory
National Weather Service Pocatello ID
1221 PM MDT Fri May 17 2024
...The Flood Advisory continues for the following rivers in Idaho...
Portneuf River at Topaz affecting Bannock County.
.Warm temperatures will melt high mountain snowpack and increase
river flows.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
River flows will remain near of slightly above flood stage today and
possibly tomorrow before likely dropping off in the next couple of
days due to cooler temperatures and a diminishing snowpack.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov/pocatello.
IDC005-182000-
/O.CON.KPIH.FL.Y.0003.000000T0000Z-000000T0000Z/
/TOPI1.N.SM.000000T0000Z.000000T0000Z.000000T0000Z.NR/
1221 PM MDT Fri May 17 2024
...FLOOD ADVISORY FOR SNOWMELT REMAINS IN EFFECT UNTIL FURTHER
NOTICE...
* WHAT...Flooding caused by snowmelt continues. Snowmelt was
slightly higher yesterday due to warmer temperatures. Snowmelt
will keep river levels higher but snowmelt and river levels will
start to drop off this next week due to cooler temperatures and a
diminishing snowpack.
* 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 Friday the stage was 4.0 feet.
- Forecast...The river is expected be just above flood stage of
4.0 feet today. Then, it will then likely fall below flood
stage early tomorrow afternoon.
- 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 Sat Sun Mon
Portneuf River
Topaz 4.0 4.0 Fri 11 am MD 4.0 4.0 3.9
LAT...LON 4275 11232 4281 11223 4265 11206 4287 11202
4287 11185 4248 11203