646
FXUS65 KPIH 281706
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1106 AM MDT TUE APR 28 2026
KEY MESSAGES
- COLD OVERNIGHT LOWS CONTINUE FOR THE NEXT COUPLE OF MORNINGS
WITH ANOTHER FREEZE WARNING IN EFFECT FOR THIS MORNING AND A
FREEZE WATCH IN EFFECT FOR TONIGHT
- THE POTENTIAL FOR SHOWERS AND EVEN A FEW THUNDERSTORMS
PERSISTS THROUGH END WEEK
DISCUSSION
ISSUED AT 300 AM MDT TUE APR 28 2026
A TROUGH OF LOW PRESSURE REMAINS OVER THE INTERMOUNTAIN WEST.
WITHIN THAT TROUGH IS A LOW PRESSURE CENTER THAT IS WORKING
THROUGH EAST IDAHO EARLY THIS MORNING. A FEW LIGHT SHOWERS MOVED
THROUGH EAST IDAHO DURING THE OVERNIGHT HOURS AND WILL EXIT
IDAHO WITH THE LOW EARLY THIS MORNING. EXPECT ENOUGH DIURNAL
INSTABILITY FOR SCATTERED LIGHT SHOWERS TO REDEVELOP THIS
AFTERNOON. CAN'T RULE OUT A RUMBLE OF THUNDER AS WELL. MOST OF
THIS ACTIVITY SHOULD DIMINISH THIS EVENING. ONCE AGAIN ANOTHER
ROUND OF SCATTERED SHOWERS IS EXPECTED WEDNESDAY AFTERNOON WITH
THE TROUGH STILL IN PLACE. REALLY ISN'T UNTIL AT LEAST THURSDAY
AND POSSIBLY EVEN FRIDAY WHEN THE TROUGH FINALLY SLIDES ENOUGH
EAST THAT WE WILL BE STABLE ENOUGH IN THE AFTERNOON FOR DRY
WEATHER THROUGH THE ENTIRE DAY. PESKY COLD TEMPERATURES AT NIGHT
CONTINUE AS LONG AS THIS TROUGH HANGS AROUND. EVEN THOUGH THE
TROUGH IS WEAKENING, WHICH IS ALLOWING THE TEMPERATURES TO
GRADUALLY WARM, ITS A SLOW PROCESS. THE THREAT FOR FREEZE WILL
CONTINUE INTO WEDNESDAY MORNING IN MOST AREAS, ALTHOUGH THE
EASTERN MAGIC VALLEY AROUND BURLEY/HEYBURN MAY STAY WARM ENOUGH
TO AVOID FREEZE, BUT LESS LIKELY FURTHER NORTH AROUND SHOSHONE.
AS WE MOVE INTO THURSDAY AND FRIDAY MORNING, TEMPERATURES WILL
BE BORDERLINE FOR FREEZE BUT COULD POTENTIALLY SUPPORT FROST
STILL. AND WE ARE SEEING INDICATIONS THAT AREAS OF THE EASTERN
SNAKE RIVER PLAIN ALONG AND EAST OF I-15 MAY STAY SLIGHTLY
WARMER. IT REALLY ISN'T UNTIL SATURDAY MORNING WHEN OVERNIGHT
TEMPS HOLD IN THE UPPER 30S INTO THE LOW 40S.
IN THE EXTENDED, WE ARE STILL SEEING SOME POTENTIAL FOR
PRECIPITATION SUNDAY ONWARD AS A LOW PRESSURE SYSTEM TRIES TO
UNDERCUT THE RIDGE AS IT WORKS IN FROM THE CALIFORNIA COAST.
TEMPERATURES IN THE EXTENDED DO NOT LOOK NEARLY AS COLD WITH THIS
NEXT SYSTEM WITH ITS SOURCE REGION BEING THE OCEAN INSTEAD OF THE
ARCTIC.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
ISSUED AT 1105 AM MDT TUE APR 28 2026
OVERALL, VFR CONDITIONS ARE EXPECTED AT ALL SITES THROUGH THE
AFTERNOON AND TONIGHT. DIJ HAS BEEN THE EXCEPTION THIS MORNING WITH
CLOUDS SCT TO BKN AT 025. CLOUDS SHOULD LIFT BACK TO VFR LEVELS THIS
AFTERNOON. ISOLATED TO SCATTERED SHOWERS ARE EXPECTED TO POP UP THIS
AFTERNOON, THOUGH MOST OF OUR SITES SHOULD NOT BE IMPACTED. BEST
CHANCE (~30 PERCENT) FOR A SHOWER AT A TERMINAL IS AT DIJ WHERE
VCSH REMAINS IN THE FORECAST. THE CHANCE IS CLOSER TO 10-15 PERCENT
AT ALL OTHER SITES, SO HAVE LEFT IT OUT OF THE TAF.
PIH WATCHES/WARNINGS/ADVISORIES
FREEZE WARNING FROM 3 AM TO 9 AM MDT WEDNESDAY FOR IDZ051>054.
FROST ADVISORY FROM 3 AM TO 9 AM MDT WEDNESDAY FOR IDZ055.
DISCUSSION...13
AVIATION...AMM
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