Area Forecast Discussion
Issued by NWS Topeka, KS

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

FXUS63 KTOP 200846

Area Forecast Discussion
National Weather Service Topeka KS
246 AM CST Mon Nov 20 2017

.SHORT TERM...(Today and tonight)
Issued at 245 AM CST Mon Nov 20 2017

Surface lee trof has developed over the Central Plains this morning,
keeping winds up overnight and holding lows up in the 40s. WV
imagery depicts generally zonal flow over Kansas, with several small
embedded shortwaves set to move over the area today, and a leading
impulse in the larger scale upper trof coming across toward early
morning Tuesday ahead of the next frontal passage.  Impacts on
sensible weather are generally breezy conditions, with highs rising
into the lower to middle 60s this afternoon, and another night of a
mixed boundary layer keeping lows in the 40s.

.LONG TERM...(Tuesday through Sunday)
Issued at 245 AM CST Mon Nov 20 2017

A surface front passes across the area early Tuesday morning and
gusty winds are once again expected Tuesday morning into the
afternoon.  Gusts up to 30 mph are expected.  Winds calm down
considerable overnight as surface high pressure makes its way over
the area Tuesday night into Wednesday.  Chilly temperatures Tuesday
night in the low 20s are followed by cooler high temperatures
Wednesday, only making it into the mid to upper 40s.  A quick warm
up is seen Thursday and Friday ahead of another surface boundary
with highs in the 60s both days.  Another dry front moves through
the area late Friday night, bringing temperatures closer to seasonal
values over the weekend.  No precipitation is expected in the
extended period.


.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 1130 PM CST Sun Nov 19 2017

For the 06z TAFs, short-range guidance shows a 45-48kt 925mb LLJ
in place over the TAF sites overnight into Monday morning. With
sustained surface winds of 10-12kts overnight, expect some LLWS
concerns through much of the overnight hours before the surface
winds increase by mid-morning. VFR conditions are expected
through the period, with southwesterly winds gusting upwards of
25-30kts mid morning through the afternoon hours on Monday.


Issued at 245 AM CST Mon Nov 20 2017

Have made some adjustments to winds and dewpoints, as models seem to
be under representing winds and overdoing dewpoints as we mix into
the boundary layer through the day.  This results in relative
humidities falling into the lower to middle 20s this afternoon.
Winds are forecast in the 15-25 mph range with gusts ranging from
20mph in NC KS to around 30 mph in east central Kansas, and when
coupled with the low RH values and dry/cured vegetation, this brings
the rangeland fire danger index up into the very high category for
areas along and south of I70 as well as locations along and west of
Highway 81.   Also to consider is the wind shift that occurs later
tonight - after a day of breezy southwest winds, the incoming front
will shift winds around to the north generally by sunrise on




LONG TERM...Heller
FIRE WEATHER...67 is the U.S. government's official web portal to all federal, state and local government web resources and services.