Area Forecast Discussion
Issued by NWS Goodland, KS
FXUS63 KGLD 220829
Area Forecast Discussion
National Weather Service Goodland KS
229 AM MDT FRI JUL 22 2016
Issued at 750 PM MDT Thu Jul 21 2016
Have issued update to decrease coverage/slow timing of rw/trw into
the CWA. Currently...only activity moving thru Cheyenne county in
CO. Based on current trend...may have to cut back further if more
of an east/northeast push is not seen in next couple hours. Some
tweaks for temps as well. Sunset is providing a much needed
cooling after many locales have seen 100F or higher today.
.SHORT TERM...(This evening through Friday)
Issued at 220 PM MDT Thu Jul 21 2016
Latest upper air data shows a ridge centered over the Texas and
Oklahoma panhandles. Rotating around the ridge is a short wave
trough currently over the Central Rockies with thunderstorms
accompanying it. At the surface a trough/dry line was located over
the Tri-State Area extending from La Junta and Lamar to Oakley and
For the rest of the afternoon the upper level short wave trough over
the Central Rockies will move onto the Plains bringing thunderstorms
with it. The surface trough/dry line will move very little during
the afternoon. Latest SPC Mesoanalysis indicates the surface
feature is capped, but this may change by late afternoon when the
upper level short wave trough deepens over it. Latest radar shows
storms already developing in southeast Colorado. Am expecting these
storms to continue tracking toward the Tri-State Area and eventually
moving into Cheyenne County Colorado.
Tonight the short wave trough will deepen over the southwest part of
the Tri-State Area. With added lift from the surface trough/dry
line am expecting storm coverage to increase during the evening. By
midnight the short wave trough will begin filling causing storm
activity to diminish. Cannot rule out isolated storms developing
across the rest of the Tri-State Area this evening due to large
scale lift from the short wave trough. The nose of the low level
jet will develop over the southeast part of the area this evening.
This may allow an isolated storm to develop along the elevated CAPE
axis that will form along the low level jet nose.
After midnight storm activity should be confined to the upper level
short wave trough that will be filling over the southwest part of
the Tri-State Area. Any storm activity should end a couple hours
after midnight as the short wave trough continues to fill.
Lows tonight will continue to be above normal.
Friday will be another warm day with heat indices of 100 to 105
across the advisory area. Highs will be very similar to today. The
surface trough will be southeast of the Tri-State Area during the
afternoon. However an upper level short wave trough will deepen
over the center of the Tri-State Area during the afternoon, with
the strongest lift over the northern and southwest part of the
area. Am expecting storm activity to be fairly isolated then
increase in coverage into the evening as the short wave trough
.LONG TERM...(Monday through Thursday)
Issued at 227 AM MDT Fri Jul 22 2016
Long term will begin with ridging beginning to take shape over the
Four Corners region and general troughing in the middle and upper
Mississippi River valley on Monday. A series of H5 shortwave
troughs will move from northwest to southeast Monday through
Wednesday along the outer northeastern fringes of the ridge. This
will slightly enhance the afternoon PoPs on Monday and especially
on Tuesday when a stronger shortwave pushes across the CWA. The
mean flow aloft during the Monday/Tuesday time frame will be west
to northwest. This will shift to more of a westerly flow as we
head into Wednesday due to a weakening of the western ridge over
the southwestern States. Cross mountain flow and lee troughing
will likely develop toward the end of the period, leading to a
continued unsettled pattern with daily afternoon thunderstorm
Temperatures during the early extended period will be around or just
above the seasonal average as the western high pressure influences
the region, especially the western/southwestern portions of the CWA.
Toward the end of the period, I expect afternoon highs to be right
around the seasonal average of upper 80s to lower 90s.
.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1120 PM MDT Thu Jul 21 2016
Conditions...VFR...with scattered mid/high clouds.
Precip/Wx....VCTS for KGLD 06z-0830z Friday...otherwise none.
Winds........For KGLD...WNW around 10kts thru 15z then NE. By
18z...SSW around 10kts. For KMCK...a NW/NE mix around 10kts thru
21z Friday...then SE around 5kts.
KS...Heat Advisory until 7 PM CDT this evening for KSZ002>004-014>016-
NE...Heat Advisory until 6 PM MDT /7 PM CDT/ this evening for