N/A This is an outlook weather briefing from the National Weather Service office in Tulsa detailing the thunderstorm potential through the holiday weekend across Eastern Oklahoma and Northwest Arkansas. Today is Thursday, August 29. First off will start with a Thursday late morning water vapor imagery of the country. A cold front was positioned from the Rocky Mountains into the Northern Plains with a warm front expanding eastward into the Ohio River Valley. This cold front is expected to continue to move into the Central Plains Thursday night and Friday morning as the area of low pressure along the U.S. and Canada border moves off to the east. Increasing moisture interacting with hot temperatures ahead of the front will aid in storm chances developing Thursday afternoon across parts of Eastern Oklahoma and Northwest Arkansas. This approaching cold front and associated outflow boundaries will be the main foci for additional storm development into the Holiday weekend. Will go into more detail in the following slides. Again ahead of the cold front hot and humid conditions with heat index values of upper 90s to around 104° will remain common across Eastern Oklahoma and Northwest Arkansas Thursday afternoon. At the same time increasing moisture interacting with max heating and marginal instability will allow for 20 to 30% chances of thunderstorms through mid evening. Gusty to locally strong winds are the primary threat with any storm development. Much of this activity should weaken with the loss of daytime heating. Overnight Thursday night shower and thunderstorm chances begin to increase again into Friday morning as the cold front and associated outflow boundary approach Northeast Oklahoma. The greater storm potential is expected across Northeast Oklahoma overnight with gusty to locally strong winds the main threat. During the Friday morning hours the outflow boundary red dashed line in the top right image from the overnight storms is expected to move into the region and remain over Eastern Oklahoma and Northwest Arkansas. While the true cold front is currently forecast to slow its momentum and remain just north northwest of Northeast Oklahoma. In response thunderstorm chances spread across Eastern Oklahoma and Northwest Arkansas Friday morning and increase Friday afternoon with the outflow boundary stretched across the region. Gusty to locally strong winds are the primary threat while also locally heavy rainfall will be possible. Shower and thunderstorm chances then continue Friday evening and night across Eastern Oklahoma and Northwest Arkansas while the surface boundary red dash line and a cold front remain over the region. The greater potential is forecast through the late evening hours before weakening some overnight. Locally heavy rainfall will remain possible through Friday night. As mentioned previously periods of locally heavy rainfall are possible Friday and Friday night as abundant low level moisture remains over the region ahead of the cold front to the north northwest. As of Thursday forecast generally less than 1/2 inch is forecast for most locations while locally up around 1 inch of rainfall is possible. The true cold front is forecast to finally pushed through Eastern Oklahoma and Northwest Arkansas Saturday and remain near the Red River Sunday. Thus additional thunderstorm chances remain for Eastern Oklahoma and Northwest Arkansas through the weekend. The greater storm potential is forecast for East Central and Southeast Oklahoma and also Northwest Arkansas. Locally heavy rainfall remains possible Saturday and Sunday though for most locations generally less than 1/2 inch of rainfall are forecast. Thunderstorm chances remain into Monday mainly for Southeast Oklahoma into West Central Arkansas ahead of a secondary cold front forecast to move into the region during the day. The secondary front looks to remain in the region Tuesday before exiting Wednesday. Thus slight chance of showers and storms may continue south of Interstate 40 Tuesday and Wednesday With the multiple rounds of shower and thunderstorm chances and the cold front moving through the region cooler conditions are forecast for the Holiday weekend into next week. Shown here are forecast high and low temperatures for select cities across Eastern Oklahoma and Northwest Arkansas Friday into next week. In summary continue to stay up to date with latest forecasts as the shower and storm chances through the Holiday weekend are updated with latest data. A couple ways to do this is by visiting our different social media platforms and also with the National Weather Service Tulsa decision support page at the web address listed on the screen. Thank you for your time and for viewing.