National Weather Service Raw Text Product

Displaying AFOS PIL: AFDGRR Received: 2020-06-29 07:09 UTC


915 
FXUS63 KGRR 290709
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
309 AM EDT Mon Jun 29 2020

LATEST UPDATE...
Synopsis/Discussion/Marine

.SYNOPSIS...
Issued at 309 AM EDT Mon Jun 29 2020

- Dry most of the week

- Very warm through the week 

&&

.DISCUSSION...(Today through next Sunday)
Issued at 309 AM EDT Mon Jun 29 2020

- Dry most of the week

Predominantly dry wx is fcst through most of the
upcoming week. However a few showers and perhaps 
a storm may clip our wsw fcst area early this week. 
This as a result of weak isentropic upglide to the 
ne of the stationary frontal boundary which will 
extend from northern IL se to central/southern IN 
early this week. Low level convergence with the 
lake breeze will also aid this potential each 
afternoon.  

However a consensus of latest medium range 
guidance/ensembles continues to suggest that most of 
the rain and convection will stay to our west/sw/south
in closer proximity to the stationary front. 

- Very warm through the week 

Latest ensembles and medium range guidance continues
to suggest it will be very warm through the week as 
the upper ridge builds in and h8 temps slowly moderate.
High temps will reach the mid to upper 80s daily and 
h8 temps/500 hgts suggest high temps will likely reach
the lower 90s by the holiday weekend. Ensembles also
continue to indicate a very dry pattern will develop 
the next couple of weeks. 

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 255 AM EDT Mon Jun 29 2020

VFR weather is in place across Southwest Lower Michigan at 06z.
This should continue to be the case for the most part the next 24
hours. There are two aviation concern through the forecast period.
The first is a very small chance for some light/patchy fog this 
morning. All observation sites are reporting 10 mile visibilities
at this point and we are not expecting any major fog development.
The second concern is the threat of showers and thunderstorms this
afternoon and evening. We are expecting scattered storms from
roughly 19z to 03z from about U.S. Highway 131 to the west. The
storms are not expected to be strong and will randomly bubble up
across the area given low wind shear. Cannot rule out some brief
IFR/MVFR conditions in the heavier rain in the cores of the 
cells. Winds through the period will be light from the southeast 
at 5-10 knots.

&&

.MARINE...
Issued at 309 AM EDT Mon Jun 29 2020

A high pressure ridge will result in minimal wind speeds 
and wave heights below two feet early this week. Offshore
winds are forecast for the most part but winds will swing
around to the northwest to west around midday daily. 

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
LM...None.
&&

$$

SYNOPSIS...Laurens
DISCUSSION...Laurens
AVIATION...Duke
MARINE...Laurens