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210
FXUS66 KPQR 271019
AFDPQR

Area Forecast Discussion
National Weather Service Portland OR
319 AM PDT Mon May 27 2024

.SYNOPSIS...
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Warmer and drier conditions today. Another round of rain
on Tuesday through Wednesday, with slight chances for rain on
Wednesday. Dry and warm conditions return towards the latter part of
the week and will possibly persist through next weekend.
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&&

.SHORT TERM...
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Monday through Wednesday Night...Warm and dry
conditions return today as weak ridging continues to develop across
the forecast area. This will result in daytime highs in the mid to
upper 70s for inland locations and upper 50s to mid 60s along the
coast. However, as the region has experienced, the warm temperatures
will not last very long as a broad, upper level trough swings through
for Tuesday and Wednesday. This will bring a return of onshore flow,
cooler temperatures and light precipitation. 850mb temperatures with
the system on Tuesday and Wednesday around 0C will signal cooler than
normal daytime highs in the mid 60s for inland locations and mid to
upper 50s along the coast. Overnight lows, will also follow a similar
pattern and also be slightly below seasonal normals for this time of
year. /42

.LONG TERM...Thursday through Sunday...As we transition into the
latter part of the week and into next weekend, conditions have the
chance to start drying out as the WPC 500 mb clusters show zonal flow
to weak ridging to strong ridging. This uncertainty within the models
is reflected within the temperature spread seen across the models,
which varies from the low 70s to the upper 80s. So, while the trend
does point towards warming, just how warm it will get is uncertain.
Towards the start of the next weekend, models continue to diverge
with some models bringing in a broad trough, which will bring cooler
temperatures and precipitation. Other models maintain a broad ridge
which would result in warm and dry conditions. So, have leaned into
the NBM which has kept a weak ridge over the region. /42
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&&

.AVIATION...
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With a weak front passing through the region, expect
coastal terminals to see brief periods of MVFR CIGS until 18-20Z
Monday. KAST has around a 40-60% chance of MVFR cigs through this
time, with chances around 30-40% at southern coastal terminals
(KONP). All inland terminals remain VFR through the TAF period,
with little to no wind this morning. Chance of fog around 10-30%
between 12-16Z Monday for areas between KCVO and KEUG. Tonight,
expect MVFR CIGS to return along the coast around 06Z Tuesday.

PDX AND APPROACHES...VFR conditions through the period, with a
high cloud deck. Winds remain variable and under 5 kts until
around 20Z Monday.
-JH
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&&

.MARINE...
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Calm winds through Monday evening. Tuesday, a trough
will enter the waters bringing potential for northwesterly gusts
up to 15-20 kt. Seas remain around 5-6 ft through the week. Little
to no impacts are expected through midweek. More active weather
expected to return Thursday/Friday, with expected gusts up to
20-25 kt suggesting Small Craft Advisory conditions.
-JH
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&&

.PQR WATCHES/WARNINGS/ADVISORIES...

OR...None.
WA...None.
PZ...None.

&&


$$

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