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Area Forecast Discussion (AFD)

Issued by Norman, OK (OUN)

                            
348 
FXUS64 KOUN 181949
AFDOUN

Area Forecast Discussion
National Weather Service Norman OK
249 PM CDT Wed Jul 18 2018

.DISCUSSION...
A few weak echoes continue on area radars, but rainfall is
minimal, so rain chances will remain very low into tonight. Storm
development will be strongly inhibited through at least Saturday,
as very warm temperatures aloft will stifle instability and
maintain very high levels of convective inhibition. Even a cold
front on Friday and Saturday will be hard pressed to generate any
precipitation as it moves to southern Oklahoma.

With the upper ridge moving almost overhead, temperatures will be
quite hot until the front arrives (it will take several days to
progress through our forecast area). Our existing Heat Advisory
didn't work out very well today under the expanse of cloud cover,
but the clouds are not expected to protect central/north-central
Oklahoma from the heat tomorrow or Friday. The rain that fell
overnight will help hold temperatures down for a day or so in
northern Oklahoma, but in exchange for that, the humidity will be
high...probably resulting in similar heat indices as in areas
farther south.

So...there are no changes to the existing Heat Advisory with this
issuance.

CmS
&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  75 107  78 107 /   0   0   0   0 
Hobart OK         77 109  79 110 /   0   0   0   0 
Wichita Falls TX  78 110  81 110 /   0   0   0   0 
Gage OK           75 105  77 104 /  10   0   0  10 
Ponca City OK     75 103  78  99 /  10   0   0   0 
Durant OK         77 105  79 107 /   0   0   0   0 

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Heat Advisory until 7 PM CDT Friday for OKZ007-008-012-013-
     018>020-023>048-050>052.

TX...Heat Advisory until 7 PM CDT Friday for TXZ083>090.

&&

$$

06/23