Area Forecast Discussion
Issued by NWS Detroit/Pontiac, MI

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FXUS63 KDTX 231047

Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
647 AM EDT Fri Mar 23 2018


Modest moisture embedded within N/NE flow will support a meager VFR
cu field this afternon as unabated insolation results in deep
boundary layer growth. Weak gradient conditions will likewise be
countered by the well-mixed daytime boundary layer which should help
winds hover around 10-12 kts for the balance of the day.

For DTW...Wind out of the NNW veering to the NE late will be
favorable for NE operations for most or all of the day.


* Low for cig aob 5kft


Issued at 239 AM EDT Fri Mar 23 2018


Extensive surface ridging will remain entrenched over the area as
strong high pressure builds through Ontario in Quebec this weekend.
This will maintain dry and cool conditions across the region through
Sunday with high temperatures ranging in the 30s to lower 40s and
low temperatures bottoming out consistently in the teens to lower
20s (some 5-10 degrees F below average for the last week of March).

The upper level pattern, which has been dominated by rather strong
(and persistent) troughing along the east coast much of this month,
will become more progressive in nature with a decided shift favoring
broad troughing over the western/central CONUS with downstream
ridging expanding across the eastern states. This will usher in a
milder and wetter weather pattern for the central Great Lakes as
broad southwest upper level flow becomes established.

Expect temperatures to climb back into the 50s for much of next week
with rain chances increasing substantially from late Monday night
into Tuesday and persisting to one degree or another through the
remainder of the week. Given the progressive nature of the upper
pattern, expect the mean troughing over the western CONUS to expand
eastward, bringing a gradual cooling trend to end the forecast
period late next week as a full latitude upper trough becomes
positioned over NOAM.


Respite from fresh northwest flow will be short-lived today as
prevailing winds veer to northeasterly in response to strong high
pressure transiting Ontario and Quebec. Strong onshore flow will
persist through much of the weekend and will necessitate another
round of small craft advisories for gusty winds...especially in
Saginaw Bay...and elevated waves in the nearshore zones of Lake


Lake Huron...Small Craft Advisory until noon EDT Sunday for LHZ421-441>443.

     Small Craft Advisory from 8 AM Saturday to noon EDT Sunday for

Lake St Clair...NONE.
Michigan waters of Lake Erie...NONE.



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