St. Anthony, Idaho 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for St. Anthony ID
National Weather Service Forecast for:
St. Anthony ID
Issued by: National Weather Service Pocatello, ID |
Updated: 2:01 am MDT Aug 1, 2025 |
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Today
 Sunny then Slight Chance T-storms
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Tonight
 Mostly Clear
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Saturday
 Mostly Sunny then Slight Chance T-storms
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Saturday Night
 Slight Chance T-storms then Mostly Clear
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Sunday
 Sunny then Slight Chance T-storms
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Sunday Night
 Partly Cloudy
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Monday
 Mostly Sunny
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Monday Night
 Partly Cloudy
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Tuesday
 Sunny
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Hi 86 °F |
Lo 48 °F |
Hi 85 °F |
Lo 47 °F |
Hi 83 °F |
Lo 50 °F |
Hi 84 °F |
Lo 46 °F |
Hi 82 °F |
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Red Flag Warning
Today
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A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 86. East northeast wind 6 to 11 mph becoming southwest 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. |
Tonight
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Mostly clear, with a low around 48. Southwest wind 16 to 21 mph becoming east 6 to 11 mph in the evening. Winds could gust as high as 32 mph. |
Saturday
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A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85. Northeast wind 6 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph. |
Saturday Night
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A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 47. West wind 6 to 13 mph becoming east northeast after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 20%. |
Sunday
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A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 83. East northeast wind 5 to 9 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%. |
Sunday Night
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Partly cloudy, with a low around 50. |
Monday
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Mostly sunny, with a high near 84. |
Monday Night
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Partly cloudy, with a low around 46. |
Tuesday
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Sunny, with a high near 82. |
Tuesday Night
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Mostly clear, with a low around 47. |
Wednesday
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Sunny, with a high near 88. |
Wednesday Night
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Partly cloudy, with a low around 49. |
Thursday
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Mostly sunny, with a high near 86. |
Forecast from NOAA-NWS
for St. Anthony ID.
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Weather Forecast Discussion
711
FXUS65 KPIH 011020
AFDPIH
Area Forecast Discussion
National Weather Service Pocatello ID
420 AM MDT Fri Aug 1 2025
.KEY MESSAGES...
- Daily, isolated to scattered showers and thunderstorms will
continue into early next week, primarily each afternoon and
evening in the mountains. Stronger storms will be capable of
producing gusty winds, small hail, and brief heavy rain.
- Red Flag Warnings are in effect today for Idaho Fire Weather
Zones 410/413/425/427 for gusty winds, low relative humidity,
and isolated mountain thunderstorms from 2 PM to 10 PM MDT.
- Conditions will remain very dry outside of any showers or
storms, with near normal to below normal temperatures into
early next week.
- Warmer and dry conditions will return for mid to late next
week under the increasing influence of high pressure.
&&
.SHORT TERM /THROUGH SATURDAY NIGHT/...
Issued at 242 AM MDT Fri Aug 1 2025
Early morning satellite imagery shows a mid/upper-level trough
and closed low centered over eastern Oregon lifting northeast
across the PacNW and northern Rockies as isolated showers
persist in the Central Mountains. As this system continues its
progression northeast over the Continental Divide into Montana,
daily isolated to scattered shower and thunderstorm chances will
continue which will peak each afternoon. The HREF model
probability of thunder today shows a 30-60% chance in the
Central Mountains, Montana Divide, and South Hills west into the
Owyhees, with a 60-90% chance in Lemhi County. Following
isolated showers/virga this morning, convective initiation this
afternoon will begin between 12 PM and 3 PM MDT, continue
through this evening, ahead of subsiding after sunset with only
isolated showers then possible overnight. Stronger storms today
will be capable of producing wind gusts up to 40-50 mph, small
hail, and brief rain. The primary corridors for stronger storms
today will be in the South Hills and Southeast Highlands where
the HREF model probability of winds greater than 35 mph shows a
30-50% chance. Outside of any showers or storms, conditions will
remain dry with highs in the valleys ranging from the mid 70s
to low 90s, with afternoon wind gusts outside of thunderstorms
peaking around 25-40 mph. As a result, another set of Red Flag
Warnings are in effect for Idaho FWZ 410/413/425/427 to capture
a mix of isolated thunderstorms in the mountains along with
gusty winds and low relative humidity. More on that in the fire
weather discussion below.
For Saturday, isolated showers and virga will be possible in
the morning, ahead of another round of isolated to scattered
showers and thunderstorms in the afternoon. Best chances will
remain confined to the mountains with more isolated coverage
across the Snake River Plain. Outside of any showers or storms,
conditions will remain dry with highs in the valleys ranging
from the upper 70s to low 90s, with afternoon wind gusts outside
of thunderstorms peaking around 20-35 mph.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
Issued at 242 AM MDT Fri Aug 1 2025
A series of shortwave troughs early next week will keep
isolated to scattered shower and thunderstorm chances going
through Monday, peaking in coverage each afternoon and primarily
remaining confined to the Central Mountains east along the
Montana Divide. Near normal to below normal temperatures will
persist early in the week with highs in the 70s/80s to low 90s
further south. Following lighter winds on Sunday, winds will be
breezy each afternoon starting Monday with gusts peaking around
25-40 mph each day. Under the increasing influence of high
pressure mid to late week, warmer and dry conditions will
prevail with near unanimous agreement amongst 500 mb ensemble
cluster showing eastern Idaho on the northern edge of a broad
region of high pressure. This will keep conditions hot and dry
as temperatures return to near normal to above normal levels to
finish out the week.
&&
.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/...
Issued at 419 AM MDT Fri Aug 1 2025
Most of the 06z guidance keeps thunderstorms away from
most of the TAF sites today. The 3km NAM shows a few showers north
of SUN and could conceivably see a VCSH there this afternoon. The
high res models also show shower and storms south of BYI, not sure
if they would be close enough to warrant a VCSH but will continue to
mention it in the TAF. Coverage in the DIJ area looks very isolated,
and will remove the PROB30 there. Otherwise, expect gusty winds of
20 to 25 kts at PIH, IDA and DIJ this afternoon.
&&
.FIRE WEATHER...
Issued at 242 AM MDT Fri Aug 1 2025
Daily, isolated to scattered showers and thunderstorms will
continue into early next week as a series of troughs from the
Pacific support sufficient moisture transport and instability
each day. Coverage of showers and storms will peak in coverage
each afternoon and evening. Red Flag Warnings are in effect
again today for Idaho FWZ 410/413/425/427 for a combination wind
gusts up to 40 mph, low relative humidity, and isolated
mountain thunderstorms that will be capable of producing outflow
wind gusts up to 50 mph. Have held off with any Red Flag issuance
for Idaho FWZ 422 given the bulk of the zone will only see
isolated thunderstorm coverage, with scattered coverage
remaining confined to the Sawtooth Valley region north. Up in
Idaho FWZ 475/476, look for yet another day of scattered showers
and thunderstorms later today but as fuels are not critical,
have held off with any fire weather headlines at this time.
For Saturday, another round of isolated to scattered showers
and thunderstorms are expected in the afternoon and evening with
minimum RHs in the teens/20s and wind gusts of 20-35 mph.
Thunderstorm coverage looks to decrease overall for Saturday as
minimum RHs slowly increase in FWZ 410, 413, and 425. However,
we will still need to evaluate Red Flag potential for Saturday
either today or Saturday morning.
Starting early next week, increasing high pressure to the south
will shift shower and thunderstorm chances back to being
confined in the Central Mountains east along the Montana Divide
as dry conditions prevail further south. As high pressure
continues to build in mid to late week, dry conditions
regionwide are expected starting Tuesday as cooler temperatures
to start the week see a warming trend later in the week. During
this timeframe, we will see breezy afternoon winds each day,
which coupled with low relative humidity, may lead to additional
fire weather headlines next week where the best overlap is.
&&
.PIH WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning from 2 PM this afternoon to 10 PM MDT this
evening for IDZ410-413-425-427.
&&
$$
SHORT TERM...MacKay
LONG TERM...MacKay
AVIATION...13
FIRE WEATHER...MacKay
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