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Grand Lake Rgnl, Oklahoma

Lat: 36.58N, Lon: 94.86W
Wx Zone: OKZ063
Warning FLW WEATHER ALERT - SHORTTERM FORECAST (More Info. Click Here) Warning
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SHORTTERM FORECAST
Issue Date: 324 AM CDT Sat Sep 22 2018
Expiration: 1030 GMT 22 2018
.NOW... At 3:15 AM, National Weather Service Doppler radars indicated that the heaviest rain was located across western Arkansas, and extreme southeast Oklahoma. Very light rain or drizzle continued over portions of northeast Oklahoma. Through 5:30 AM...Moderate to heavy rains will continue across western Arkansas, where another inch or so of rain is possible. Elsewhere, rainfall rates have really dropped off. Additional precipitation will average from a tenth of an inch to a quarter of an inch. If you are planning to travel early this morning, be prepared for flooded roads. Temperatures will hold steady in the upper 50s to low 60s across northeast Oklahoma and northwest Arkansas to the upper 60s to lower 70s across far southeast Oklahoma.


Issue Date: 455 PM CDT Fri Sep 21 2018
Expiration: 1030 GMT 22 2018
...HEAVY RAINFALL LIKELY THROUGH SATURDAY NIGHT... This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...Today and Tonight. FLASH FLOOD. RISK...Elevated. AREA...Mainly Southeast of Interstate 44. ONSET...Ongoing. HEAVY RAIN. RISK...Significant. AREA...Mainly Southeast of Interstate 44. ONSET...Ongoing. AREA AT GREATEST RISK...Along and South of Interstate 40. THUNDERSTORMS WITH DANGEROUS LIGHTNING. RISK...Limited. AREA...Western Arkansas and Southeast Oklahoma. ONSET... . SIGNIFICANT WINDS. RISK...Limited. AREA...Northeast Oklahoma. ONSET...Ongoing. DISCUSSION... Widespread heavy rainfall is expected across the region through tonight with the greater potential for excessive rainfall becoming more focused along and south of Interstate 40 through the evening. This heavy rainfall will likely result in some flash flooding and a Flash Flood Watch remains in effect for much of Eastern Oklahoma and all of Northwest Arkansas. Widespread rain showers along with isolated thunderstorms will continue across Eastern Oklahoma and Northwest Arkansas as a cold front makes its way into the region and interacts with tropical moisture in place. Rain will decrease through the evening across northeast Oklahoma as the cold front ushers in drier air. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Spotter Activation Not Expected. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. SATURDAY...Thunderstorm Potential...Heavy Rain Potential. SUNDAY...No Hazards. MONDAY through THURSDAY...Thunderstorm Potential. EXTENDED DISCUSSION... Widespread showers and thunderstorms will continue across much of eastern Oklahoma and northwestern Arkansas through Saturday night as the cold front slowly pushes south. Heavy rainfall will continue through Saturday night and into Sunday morning. An axis of three to six inch storm-total rainfall amounts is expected across southeastern Oklahoma and west central Arkansas through Sunday morning, with one to three inches possible across northeastern Oklahoma and northwest Arkansas. Locally heavier amounts are likely across southeastern Oklahoma. Flash flooding will be possible into Sunday morning, and minor to moderate mainstem river flooding is possible depending on where the heaviest rainfall occurs. An active weather pattern will continue across eastern Oklahoma and northwest Arkansas into late next week. Moist and unstable air will remain over the area, and a couple cold fronts are expected to move into the area on Tuesday and again on Thursday. Thunderstorms will be possible each day from Sunday through Thursday but organized severe weather is not expected at this time during this period. weather.gov/tulsa contains additional information.


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