Area Forecast Discussion
Issued by NWS Quad Cities, IA IL

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS63 KDVN 141748
AFDDVN

Area Forecast Discussion
National Weather Service Quad Cities IA IL
1148 AM CST Thu Dec 14 2017

...AVIATION UPDATE...

.SYNOPSIS...
Issued at 252 AM CST Thu Dec 14 2017

06Z surface data has the cold front running from northwest Ohio,
into southeast Iowa, and then to the eastern Dakotas. Dew points in
the frontal zone were in the 20s with teens and single digits across
the Great Lakes and upper Midwest.

&&

.SHORT TERM...(Today and Tonight)
ISSUED AT 252 AM CST Thu Dec 14 2017

Through sunrise, quiet but cold conditions will be seen across the
area with more breaks developing in the clouds.

For Thursday, quiet, dry and colder than normal conditions will be
seen across the area. Clouds will be on the increase during the
afternoon.

Tonight, a weak upper level disturbance will move through the area.
Moisture is very limited so only some passing flurries are expected.
The flurries will end from west to east after midnight.

.LONG TERM...(Friday through Wednesday)
ISSUED AT 252 AM CST Thu Dec 14 2017

Chance of a light mixed precipitation event this weekend...then
favorable regime flow for snow around Christmas.

Long Term Forecast Confidence Assessment...fair or average. Main
issue is light rain and possibly mixed precipitation event this
weekend with any amounts light and flow pattern not supportive of
significant snow/ice issues.   Lingering second as confirmed past
several days is highs most days up to 3 plus degrees too cool and
lows with clear skies and lighter winds probably too mild by 2 to 3
plus degrees.

Friday through Saturday...only minor changes, generally partly
cloudy to mostly clear.  Highs mostly in the 32 to 42 range on
Friday, rising to the 42 to 52 on Saturday.  Lows 15 to 25 on
friday AM, rising into the 20s for mins on Saturday AM.

Sunday...mostly cloudy with light precipitation in the form of light
rain and possibly starting initially as snow/sleet before becoming
all rain due to widespread warm air advection. Little winter impacts
expected as temperatures rise mostly into the 40s and possibly lower
50s south. Clearing Sunday night with lows 25 to 33.

Monday through Thursday ...northwest flow with fair skies and highs
mostly in the 40s with mins mainly in the 20s.  This is slightly
above normal.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday Afternoon)
ISSUED AT 1148 AM CST Thu Dec 14 2017

VFR with pockets of MVFR cigs this afternoon then becoming
widespread MVFR cigs tonight, then returning to VFR by Friday
afternoon. There may be scattered flurries tonight with a weak
upper level disturbance, but no impacts to aviation expected.
West to northwest winds 10 to 15 knots through the period.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...NONE.
IL...NONE.
MO...NONE.
&&

$$

SYNOPSIS...08
SHORT TERM...08
LONG TERM...Nichols
AVIATION...Haase


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.