672
fxus63 kdtx 191925
afddtx
area forecast discussion
national weather service detroit/pontiac mi
325 pm edt mon oct 19 2026
.key messages...
- dry weather with mild afternoon highs and cool morning lows will
persist into the weekend.
&&
.discussion...
blocking pattern will result in surface high pressure and ridging
being entrenched across the great lakes yielding quiet weather
conditions through the week.
a surface high pressure will move across the northern great lakes
into quebec tonight and tomorrow. light southwesterly winds today
will become more east-northeasterly for tomorrow while remaining
light. this shift in winds brings the only notable weather item for
this forecast, which will be the potential for some isolated areas
of patchy shallow fog that may develop with the help of the lake
moisture.
thermal profiles over the course of the week will not change all
that much with a persisting warmer airmass that brings temperatures
that are a few degrees above climatological norms. look for
afternoon highs mainly in the 60s with overnight lows ranging from
the mid-upper 30s to mid 40s.
the active northern stream across central canada will attempt to
send a front into the region. it should weaken as it progresses and
only manage to reach the northern lakes before longwave ridge
amplification ramps back up ensuring continued dry and slightly
above normal warmth through the end of the week. high pressure
centered over eastern canada will offer potential for slightly
cooler temperatures friday down to 60 with the northerly flow.
temperatures quickly recover as thermal ridge builds back into the
great lakes for the weekend.
&&
.marine...
the influence of high pressure sustains benign marine conditions
this evening and through the week. an uptick in easterly wind occurs
across northern lake huron tuesday morning as the center of the high
strengthens just north of georgian bay, with gusts up to 20 kt. wind
weakens by the afternoon then gradually veers to southwest by
wednesday afternoon. a dry cold front passes through wednesday night
with another broad area of high pressure taking residence through
the end of the week.
&&
.prev discussion...
issued at 118 pm edt mon oct 19 2026
aviation...
vfr conditions across the area as high pressure continues to sit
overhead. clear skies today before some cirrus slides in tonight
which may continue into tuesday. light southwesterly winds today
will go calm tonight before becoming northeasterly tuesday.
d21/dtw convection...there will be no thunderstorms through the taf
period.
dtw threshold probabilities...
* none.
&&
.dtx watches/warnings/advisories...
mi...none.
lake huron...none.
lake st clair...none.
michigan waters of lake erie...none.
&&
$$
discussion...aa
marine.......tf
aviation.....drk
you can obtain your latest national weather service forecasts online
at www.weather.gov/detroit.