The front is slowly moving southward this morning and will bring some minor relief from the heat today and tomorrow before the heat and high pressure return this weekend.
Drier air will be filtering southward behind the boundary and should allow for some lower relative humidity values this afternoon. The result will be temperatures in the mid to upper 90s but with a drier air mass. The boundary is expected to stall south of the I-40 area and very little relief will be expected for southern OK where temperatures may be closer to 100 than the mid 90s. Heat advisories will not be needed for northern OK but an advisory will be required for the southern part of the state. We've noticed a few storms this morning across south central OK but these will continue to move south away from our area. A few showers and storms will be possible later tonight across the Red River Valley.
This dry air will also allow the morning lows both Friday and Saturday to drop into the lower and mid 60s across northern OK with the Tulsa metro around the 67 to 70 degree mark for lows.
The next boundary is expected to arrive Monday according to the ensembles but only a very small chance of showers and storms will be possible with this front. Temperatures will be dropping into the upper 80s near 90 for highs Monday with a slight rebound in temps for Tuesday and Wednesday.
The GFS is not as bullish on the Monday boundary, but the usually reliable EURO continues to suggest this boundary will arrive early next week.
I will not post too much regarding Irene but you can track the system at www.nhc.noaa.gov.
The consensus of the data has not changed much overnight and the official track from the NHC continues to suggest the system will move up the east coast with a possible brush near the Outer Banks of the Carolinas before making landfall in the New England area by late this weekend. The system will be moving into cooler oceanic water temperatures as it moves more northward in latitude by this weekend.