560
WWUS75 KPIH 210703
NPWPIH
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE POCATELLO ID
103 AM MDT THU MAY 21 2026
IDZ054-212115-
/O.NEW.KPIH.FR.Y.0008.260522T0900Z-260522T1500Z/
/O.CON.KPIH.LW.Y.0007.260521T1700Z-260522T0300Z/
LOWER SNAKE RIVER PLAIN-
INCLUDING THE CITIES OF POCATELLO, AMERICAN FALLS, BLACKFOOT,
SHELLEY, AND FORT HALL
103 AM MDT THU MAY 21 2026
...LAKE WIND ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9
PM MDT THIS EVENING FOR AMERICAN FALLS RESERVOIR...
..FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM MDT FRIDAY
* WHAT...FOR THE LAKE WIND ADVISORY FOR AMERICAN FALLS RESERVOIR,
NORTH WINDS 10 TO 15 MPH WITH GUSTS UP TO 25 MPH EXPECTED. FOR THE
FROST ADVISORY, TEMPERATURES OF 32 TO 36 DEGREES WILL RESULT IN
FROST FORMATION. MORE RURAL AREAS COULD BRIEFLY DROP TO 30, WHILE
AREAS ALONG I 15 MAY STAY ABOVE 36.
* WHERE...LOWER SNAKE RIVER PLAIN.
* WHEN...FOR THE LAKE WIND ADVISORY, FROM 11 AM THIS MORNING TO 9 PM
MDT THIS EVENING. FOR THE FROST ADVISORY, FROM 3 AM TO 9 AM MDT
FRIDAY.
* IMPACTS...STRONG WINDS AND ROUGH WAVES ON AREA LAKES, INCLUDING
AMERICAN FALLS RESERVOIR, WILL CREATE HAZARDOUS CONDITIONS FOR
SMALL CRAFT. FROST COULD HARM SENSITIVE OUTDOOR VEGETATION.
SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BOATERS ON AREA LAKES SHOULD USE EXTRA CAUTION SINCE STRONG WINDS
AND ROUGH WAVES CAN OVERTURN SMALL CRAFT.
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
IDZ052-053-212115-
/O.NEW.KPIH.FR.Y.0008.260522T0900Z-260522T1500Z/
ARCO/MUD LAKE DESERT-UPPER SNAKE RIVER PLAIN-
INCLUDING THE CITIES OF ST. ANTHONY, INL, IDAHO FALLS, CRATERS OF
THE MOON NM, REXBURG, AND MUD LAKE
103 AM MDT THU MAY 21 2026
..FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM MDT FRIDAY
* WHAT...TEMPERATURES OF 32 TO 36 WILL RESULT IN FROST FORMATION.
ISOLATED RURAL AREAS COULD BRIEFLY DROP TO 30 DEGREES.
* WHERE...ARCO/MUD LAKE DESERT AND UPPER SNAKE RIVER PLAIN.
* WHEN...FROM 3 AM TO 9 AM MDT FRIDAY.
* IMPACTS...FROST COULD HARM SENSITIVE OUTDOOR VEGETATION. SENSITIVE
OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE STEPS NOW TO PROTECT TENDER PLANTS FROM THE COLD.
VISIT WEATHER.GOV/POCATELLO FOR MORE INFORMATION.
JKEYES
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