Area Forecast Discussion
Issued by NWS Tulsa, OK

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245
FXUS64 KTSA 251050
AFDTSA

Area Forecast Discussion
National Weather Service Tulsa OK
550 AM CDT Tue Jul 25 2017

...UPDATE...

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.

VFR conditions will prevail through the period. Light fog may
develop for a short time this morning at FYV and XNA. The chance
of thunderstorms impacting the W AR terminals during the afternoon
is nonzero, but below mentionable levels at this time given the
likely isolated nature of any development.

&&

.PREV DISCUSSION... /Issued 230 AM CDT Tue Jul 25 2017/

DISCUSSION...
The upper ridge will remain firmly entrenched across the southern
Plains...with a few more days of heat/humidity before we catch a
bit of a break toward the end of the week. Current heat advisory
looks good for today...with afternoon heat index values around
104F to near 110F in a few spots. Afternoon showers/thunderstorms
possible across western AR into far eastern OK...although coverage
will remain isolated. Not much change for Wednesday...with high
temperatures perhaps a degree or two warmer than today. Have
extended the heat advisory into Wednesday as well and may need to
add a few counties across far northeast OK into northwest AR.

A pattern change will ensue going into late this week as the upper
ridge retrogrades and northwesterly flow develops across the
region. This will drive a cold front into our area by Thursday
afternoon...along with increasing chances of showers/storms later
Thursday into Friday.

The coming weekend is shaping up to be relatively "nice" by July
standards...with a much drier airmass overspreading the region.
Expect an extended period of highs in the mid 80s/lower 90s and
overnight lows in the 60s to near 70.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Heat Advisory from noon today to 8 PM CDT Wednesday for OKZ049-
     053>057-059>062-064>067-070>076.

AR...Heat Advisory from noon today to 8 PM CDT Wednesday for ARZ019-
     020-029.

&&

$$

AVIATION...22



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