Area Forecast Discussion
Issued by NWS Springfield, MO
FXUS63 KSGF 181127
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
627 AM CDT Mon Aug 18 2014
.SHORT TERM...(Today and Tonight)
It was a quiet night over extreme southeast Kansas and the
Missouri Ozarks. There were a few storms over northern Arkansas,
along with a storm cluster in central Kansas that produced some
severe wind gusts.
Heading into today`s period, max temperatures will increase by a
few degrees, putting many locations in the lower 90s by mid
There doesn`t appear to be any triggers for convection through
today, therefore we`ll keep the forecast dry through 7 pm.
Rain chances will definitely start to increase into tonight`s
overnight hours, as a speed max located over South Dakota forces a
complex of storms to fire somewhere around Topeka Kansas or St.
Joe Missouri. Storm motion vectors along with 0-3 km shear
vectors, would suggest propagation to the southeast, and directly
into the Missouri Ozarks.
The NAM shows storms moving into west central Missouri by
midnight, and spreading southeast into the rest of the area
between midnight and 6 am.
The Ozarks environment could be sufficiently unstable for a few
severe thunderstorms, and deep layer shear is expected to range
from 15 to 25 knots. Damaging wind gusts and hail up to the size
of quarters would be possible with the stronger updrafts given
this environment. We will include a mention of severe
thunderstorms into this morning`s Hazardous Weather Outlook.
.LONG TERM...(Tuesday through Sunday)
A few residual showers and thunderstorms will be possible Tuesday
morning, prior to completely dissipating by early afternoon. At
this point, a major warming trend will begin, which highlights the
A strong summertime high will expand across the Ozarks Region late
in the week, and could persist for 3 - 5 days.
The 00z runs from the GFS and ECMWF are suggesting a stronger high
center, along with an extended period of time that it could
persist over the area.
Model guidance has been too cool the last few days, but has been
gradually increasing in values. Therefore we continued to bump
guidance numbers up about 4 degrees for the Thursday, Friday, and
Saturday periods. We currently have temps running from 96 to 100
degrees those three afternoons. Max heat indices will range from
100 - 105 degrees. This late week airmass will include the hottest
temperatures so far this summer.
It`s quite possible this heat could extend into Sunday or even
early in the following week given the latest trends from the GFS
and ECMWF slower to break down the high.
No precipitation is forecasted beyond Tuesday morning as the
summertime high should suppress any updraft attempts.
Have a great work week !
.AVIATION...(For the 12Z TAFS through 12Z Tuesday Morning)
Issued at 614 AM CDT MON AUG 18 2014
The threat for low ceilings and fog has diminished for southern
Missouri this morning. Some patchy shallow ground fog will remain
possible, but coverage/impact is expected to be too low to include
in the TAFs. Otherwise, VFR conditions are expected to persist
through this evening. A low level jet stream will then bring low
level wind shear to the area overnight. This jet stream may also
fuel a complex of thunderstorms across portions of Missouri late
tonight. If these storms materialize, they could clip the
MO...DENSE FOG ADVISORY until 9 AM CDT this morning FOR MOZ055>058-