Hazardous Weather Outlook
Issued by NWS Tulsa, OK

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FLUS44 KTSA 200950
HWOTSA

Hazardous Weather Outlook
National Weather Service Tulsa OK
450 AM CDT Thu Apr 20 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211000-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
450 AM CDT Thu Apr 20 2017

...FLOODING LIKELY TONIGHT INTO FRIDAY NIGHT...

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...Today and Tonight.

SEVERE THUNDERSTORM.
RISK...Limited.
AREA...Eastern Oklahoma and Western Arkansas.
ONSET...Mid Evening.

HEAVY RAIN AND FLASH FLOOD.
RISK...Limited.
AREA...Northeast Oklahoma and Northwest Arkansas.
ONSET...Midnight.

DISCUSSION...
Isolated showers and thunderstorms are ongoing this morning
across parts of northeast Oklahoma. Additional development will be
possible through midday, primarily affecting northeast Oklahoma
and into northwest Arkansas. Severe weather is not expected from
any of the daytime activity.

More widespread thunderstorms are expected to develop from mid to
late evening into early Friday morning. Large hail to the size of
golf balls will be possible with a few of the strongest
thunderstorms, but the bigger threat is likely to be the
developing heavy rain and flash flooding potential across
northeast Oklahoma and northwest Arkansas. A Flood Watch is in
effect for areas along and north of an Okemah to Fayetteville to
Huntsville line beginning midnight tonight.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Local Spotter Activation May Be Needed.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY...Severe Thundertorm Potential...Heavy Rain Potential.
SATURDAY THROUGH TUESDAY...No Hazards.
WEDNESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Widespread thunderstorms will be ongoing Friday morning and
continue through the day across much of the area along and north
of Interstate 40, with a flash flooding and isolated large hail
threat. The aforementioned Flood Watch is in effect through
midnight Friday, with storm total rainfall amounts to the north
of Interstate 40 in the 2 to 4 inch range and a potential for
local amounts from 6 to 7 inches. Both flash flooding and mainstem
river flooding may occur due to these rainfall amounts.

Additional thunderstorm development may occur during the afternoon
and evening hours along and south of a front in parts of
southeast Oklahoma and into west central Arkansas. Storms that
develop in this region will be capable of producing very large
hail and damaging winds. A Limited tornado potential will also
exist, largely contingent on whether discrete thunderstorms
develop.

Thunderstorm potential will end from west to east Friday night
and into early Saturday morning.

Low thunderstorm chances will return toward the middle to latter
part of the next work week, after a multi-day lull in activity.

weather.gov/tulsa Contains additional information.

$$



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