Area Forecast Discussion
Issued by NWS Topeka, KS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
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
FXUS63 KTOP 240805

Area Forecast Discussion
National Weather Service Topeka KS
305 AM CDT Sun Sep 24 2017

.SHORT TERM...(Today and tonight)
Issued at 254 AM CDT Sun Sep 24 2017

Water vapor imagery showing upper trough over the Rockies with a
stronger wave in it rotating northeast into southern Utah. Decent
moisture feed downstream of the trough is interacting with a deep
frontal boundary from eastern Colorado into north central Nebraska
to produce scattered showers over western portions of Kansas and
Nebraska overnight.

The Utah wave slowly translates northeast today and tonight,
reaching central Wyoming by Monday morning. The deeper moisture and
modest forcing slowly works its way east across the state, with
precipitation chances ramping up in the area. Expect scattered
activity to reach western areas of the local area this afternoon and
on east into much of the area during the night. Meager lapse rates
aloft keep instability limited, but could see a few thunderstorms
develop. Should see high cloud increase from the southwest through
the day and with continued cooler air pushing in from the south-
southeast, have highs again a bit cooler than the previous day.

.LONG TERM...(Monday through Saturday)
Issued at 254 AM CDT Sun Sep 24 2017

On Monday morning, the mid-level trough will be located over
the Rockies with southwest flow persisting over northeast Kansas
as the trough slowly moves eastward through the day. Ongoing
showers and thunderstorms are likely Monday morning located near a
surface front located across central Kansas. This front will move
across the CWA Monday bringing widespread precipitation to the
area along with decreasing temperatures behind it. Temperatures
will decrease 10-15 degrees during the afternoon Monday from
northwest to southeast as the front moves through. Widespread
severe weather continues to look unlikely with only meager CAPE
values and effective shear ahead of the front around 25 knots.
850mb winds from the south southwest will be oriented parallel to
the front which could allow for some training of storms leading to
localized heavy rainfall as the boundary pushes through by late
Monday night. Post-frontal precipitation is expected to linger
through Tuesday, with clearing beginning later Tuesday afternoon
from the northwest to southeast. By Wednesday morning, all showers
and storms will have moved out of the area. Tuesday will be the
first day seasonable temperatures are seen across all of northeast
Kansas, with high temperatures in the upper 60s to mid-70s.

While models do diverge a bit in the overall synoptic pattern late
week, the overall consensus is for dry conditions through the end
of the period. High temperatures remain pretty steady Tuesday
through Saturday with low to mid-70s seen. Lows generally stay in
the 50s and upper 40s through the extended period.


.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1145 PM CDT Sat Sep 23 2017

Expect VFR conditions through the next 24 hour at all terminals.
There may be some low level windshear within the lowest 2000 feet
through 13Z, as a low-level jet at 1500 feet above the surface
remains between 25 to 30 KTS. Any Isolated to scattered
thunderstorms should remain west of the terminals Sunday evening.




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