Alan Crone's Weather Blog: Sunshine And The Heat Index This Weekend
Friday, June 19th 2015, 4:03 am
By: Alan Crone
Tropical depression Bill is now east of the state, but the impacts from this prolific rain producing system continue to be felt in the form of washed-out roadways and flooding rivers. Numerous flood warnings, including major river flood warnings, will remain in place for the next few days. Drivers should continue to use caution today and tonight as flood waters recede from localized flooding regions. Our pattern will support several days of dry but humid conditions along with a mostly sunny weekend. The next chance for showers and storms may not arrive until late next week into next weekend.
Some very high rainfall totals were recorded at certain Oklahoma Mesonet sites across south-central Oklahoma during this event resulting in numerous flash flood warnings across south-central and eastern OK during the last 36 hours. I'll refrain ( due to the lack of time) from listing all river flood data at this hour. I do want to mention a few rivers and creeks of interest. Polecat Creek will be at major flood today and not dropping below flood stage until sometime Saturday morning. The Deep Fork at Beggs will be at major stage and not drop for a few days. The Washita at Dickson has reached an all-time flood state, currently at 48.49 as of this posting. Destructive flooding along the Washita is likely and this major flood will not drop below flood stage until sometime Tuesday or Wednesday of next week.
A few clouds will remain for the next few hours before thinning from the west to east as the day progresses. Temperatures this morning in the lower 70s will move into the mid to upper 80s later this afternoon along with north winds shifting to the south by early evening. Wind speeds will remain light.
A mid-level ridge of high pressure is expected to develop over the region this weekend and should remain near the state for the majority of the week.
This will keep most of the rain and storm chances near or less than 10% for the period. Later next week, the ridge is expected to weaken and will allow another boundary to near the state by next weekend. I did notice a weak tropical wave that could move on the back side of the mid-level ridge Wednesday. This small disturbance could bring a few showers into far southeastern OK or southwestern Arkansas, but the chance remains very remote.
Temperatures this weekend should climb from morning lows in the lower to mid-70s into the lower 90s for daytime highs. The tropical air-mass currently in place should remain entrenched over the state. Evapo-transpiration from recent rainfall will also keep moisture levels quite high. Temperature heat index values will climb to near 100 this weekend into the early part of next week for afternoon readings. South to southwest winds in the 10 to 25 mph range will remain for the weekend into early next week.
Thanks for reading the Friday morning weather discussion and blog. Have a super great day.