Area Forecast Discussion
Issued by NWS Quad Cities, IA IL

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

000
FXUS63 KDVN 221921
AFDDVN

Area Forecast Discussion
National Weather Service Quad Cities IA IL
221 PM CDT Fri Sep 22 2017

.SYNOPSIS...
Issued at 151 PM CDT Fri Sep 22 2017

Hot temperatures and boundary layer moisture this afternoon were
leading to heat indices in the mid to upper 90s across the region.
Clear skies were reported across the area as well. A heat advisory
is in effect until 7pm tonight as the late season heat and
humidity are heat indices near 100 degrees.

&&

.SHORT TERM...(This Evening through Saturday)
ISSUED AT 151 PM CDT Fri Sep 22 2017

Autumnal equinox arrives at 302 pm today but temperatures will
feel more like the summer solstice instead.

Main forecast concern in the short term are the temperatures as
hot air and low level moisture keeps sensible weather summer-
like. Temperatures should be cooler tomorrow as today, however
heat indices will still be in the 90s. Those taking places in
outdoor activities should drink plenty of water.

.LONG TERM...(Saturday Night through Friday)
ISSUED AT 151 PM CDT Fri Sep 22 2017

Above average temperatures and humidity to continue through the long
term period. With a gradual reduction in high temps until a front
comes through sometime Tuesday into Wednesday.  Behind this front,
much cooler and more seasonable weather is expected.

H85 temps will remain near 20C tomorrow and start to drop by a few
degrees by Monday. This will bring highs out of the 90s and into the
upper 80s on Sunday.  What does remain is the moisture.  Heat
indices will remain in the 90s through the period.  Some high clouds
may start to move into the area later in the weekend.  This should
also help to temper high temps.

Tuesday, guidance still differs on overall H5 flow pattern for the
cold front passage.  Some guidance has a strong H5 negatively tilted
trough to our north while others are much less strong.  Regardless
this will be our next chance for showers and storms.   Expect this
to be better refined in the next few forecast iterations.  Past this
time, cooler more Fall-like temps come to the area.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday Afternoon)
ISSUED AT 1235 PM CDT Fri Sep 22 2017

VFR conditions are expected through the period. High pressure will
control the weather through the TAF period. There is a low
potential for MVFR vsbys in the AM. At this time, held off on
putting them in as it appears winds will stay strong enough to
keep vsbys at bay.


&&

.CLIMATE...
ISSUED AT 151 PM CDT Fri Sep 22 2017

Record Highs for September 22...

Moline.........95 in 1937
Cedar Rapids...94 in 1930
Dubuque........92 in 1937
Burlington.....94 in 1937


Record Highs for September 23...

Moline.........91 in 2007
Cedar Rapids...90 in 1930
Dubuque........91 in 1891
Burlington.....93 in 2007


Record Highs for September 24...

Moline.........91 in 2007
Cedar Rapids...92 in 1984
Dubuque........90 in 1935
Burlington.....91 in 2007


Week 2...

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...Heat Advisory until 7 PM CDT this evening for Benton-Buchanan-
     Cedar-Clinton-Delaware-Des Moines-Dubuque-Henry IA-Iowa-
     Jackson-Jefferson-Johnson-Jones-Keokuk-Lee-Linn-Louisa-
     Muscatine-Scott-Van Buren-Washington.

IL...Heat Advisory until 7 PM CDT this evening for Carroll-Hancock-
     Henderson-Henry IL-Jo Daviess-McDonough-Mercer-Rock Island-
     Warren-Whiteside.

MO...Heat Advisory until 7 PM CDT this evening for Clark-Scotland.

&&

$$

SYNOPSIS...Gibbs
SHORT TERM...Gibbs
LONG TERM...Gibbs
AVIATION...Gibbs
CLIMATE...Gibbs



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