Mount Holly states there will be some mixing today during the afternoon hours, so dew points may not reach extreme levels at that time. Presently my DP is 76, very steamy ! Also, seeing some storms form in North central Maryland moving East.
Worse area appears to be the Delmarva region where it almost reaches heat advisory levels.
Increasing southwest flow will
usher a warmer and more humid airmass into the region. Highs
today will top off in the upper 80s to around 90. Surface dew
points will generally be in the low to mid 70s, but afternoon
mixing should keep dew points from getting into the upper 70s.
Will blend the CONSALL and NBM guidance for dew points today,
and that will keep dew points from getting as high as the NBM.
Max heat index values will be in the mid to upper 90s, and near
100 in Delmarva, which will be just below Heat Advisory
criteria.