Area Forecast Discussion
Issued by NWS Goodland, KS
FXUS63 KGLD 290950
Area Forecast Discussion
National Weather Service Goodland KS
350 AM MDT SUN MAY 29 2016
.SHORT TERM...(Today through Tuesday night)
Issued at 348 AM MDT Sun May 29 2016
Forecast issues will be chances of thunderstorms and when next
chance of severe weather. Satellite showing complicated and
amplified/blocky pattern from the Pacific into the western Atlantic.
At jet level...Nam was doing a little better than the rest of the
output. At mid levels...the models were close with the Canadian/Gfs
and Nam doing a little better. Sref was doing the best on the
surface wind and pressure field. The Gfs/Nam/Ecmwf were doing the
best on the low level thermal field.
Models are doing a little better today. However, models continue
to have problems with the surface winds, low level thermal fields,
and convective feedback issues. Also the hires/convective allowing
output continues to have differences and is overdoing
precipitation. Overall, confidence is below normal on solutions.
Today/tonight...A weak right rear quadrant affects the southern half
of the area through the morning. Also weak shortwave trough moving
through. Some weak convection going on at this time and should
primarily be confined to the southern and eastern areas this
Again multiple shortwave troughs, some suffering from convective
feedback, and how they interact making this period uncertain. One
shortwave trough leaves the eastern portion of the area late this
morning/early this afternoon as another shortwave approaches from
the south and west. Convection looks to move through the area and
mainly affect western areas before ending.
Looks to be less cloud cover than anticipated yesterday so raised
maxes. For tonight models showing an increase, of varying degrees,
in low level moisture during the night. May end up being just
stratus but did add patchy fog for later tonight.
Monday/Monday night...look to have some fog and stratus in the
morning and then looks to clear out by late morning. Some increase
in lift in the morning with the strongest shortwave to move through
expected in the afternoon and nighttime hours. Will have slight
chance pops in the morning increasing to chance in the afternoon
with high chance to likely pops during the night. Spc expanded/moved
a slight risk into the area for this period. Considering the veering
wind profile and decent lapse rates in the place, the slight looks
reasonable and will continue the mention of severe in the grids.
Again guidance a little warmer and considering that there looks to
be less clouds, raised maxes a little again.
Tuesday/Tuesday night...shortwave that moved through the period
before will force a cold front through the area by the beginning of
the period. Upslope flow increases behind the front. Despite the
mean trough still our west and northwest, the models do depict a lot
of mid level lift moving through and seems unorganized and not very
definite. However, right rear quadrant begins affecting the northern
portion of the area late in the afternoon. This sags south and
strengthens through the night.
However, models not very excited about producing much precipitation
despite the jet models. The appear to not have a lot of moisture,
but considering the upslope and jet lift thought model pops and qpf
would be area. At this time kept slight chance to low chance pops
with the highest pops in the southern portion. Again look to be
warmer and carry less cloud cover. Again at this time only minor
adjustments to the maxes.
.LONG TERM...(Wednesday through Saturday)
Issued at 158 AM MDT Sun May 29 2016
The majority of the extended period is expected to be dry due to a
ridge moving into the region Wednesday night. Based on the GFS and
European models the ridge will stay over the CWA for the entire
period. The only times that could have the possibility of receiving
some precipitation are Wednesday during the day and Saturday night.
On Wednesday before the ridge moves into the region a trough is
moving east past the CWA, this could potentially impact the southern
and eastern portions of the area due to moisture being pulled into
the base of the trough. Instability factors are not impressive
during this time, so opted to keep PoPs out of the forecast for now.
As for Saturday, the ridge is still over the CWA but a frontal
boundary pushes down from the trough in the eastern CONUS and pulls
in some moisture allowing for some potential for precipitation. It
does not look impressive at this time, but included some slight
chances PoPs 00z-12z Sunday. Overall the extended period looks to be
dry and warm.
.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1029 PM MDT Sat May 28 2016
VFR conditions forecast for the TAFs. Light winds will continue
through the TAF period. Storms are persisting over East Central
Colorado this evening, but am still thinking they should end
before reaching KGLD. Am anticipating storm activity for the rest
of the night to be south of KGLD.
Sunday storms may start to develop during the late morning over
the east half of the area, with coverage increasing during the
afternoon. Storm coverage still too sparse to be included in the
TAF at this time.