Synopsis:
A cold front will move through during the wee hours tonight with rain (thundershowers N+W) ending around midnight. High pressure will work its way in for Tuesday night, producing lake-effect snow as it enters. The high will exit Wednesday evening and a warm front will approach from the south and west bringing rain to the region on Thursday AM. The rain continues on Thursday with an overnight changeover - as the upper-level portion of the cold front moves over PA. The precip. will end from west to east early Friday.
Models used: 15Z SREF Plumes, 12Z NAM & GFS
Short-term:
See SPC Mesoscale Discussion 62 for he convection. Clearing ahead has resulted in marginal istability leading to convective showers producing gusty winds and small hail.
The front moves through from west to east overnight... the clouds dissipating will be the sign that the cold front is moving through. Little change in temps. but its passage causes a drop to the 30s on Wed.
Long-range:
High builds in for Tues and Wed; the front moves through Thursday and Fridau. Ahead of warm front is clouds then rain (sleet mixing in cannot be ruled out during the early AM.). The front will move N&E. the cold front will move through - upper levels will cool below freezing in the western half of PA.
-Jaron Breen
A cold front will move through during the wee hours tonight with rain (thundershowers N+W) ending around midnight. High pressure will work its way in for Tuesday night, producing lake-effect snow as it enters. The high will exit Wednesday evening and a warm front will approach from the south and west bringing rain to the region on Thursday AM. The rain continues on Thursday with an overnight changeover - as the upper-level portion of the cold front moves over PA. The precip. will end from west to east early Friday.
Models used: 15Z SREF Plumes, 12Z NAM & GFS
Short-term:
See SPC Mesoscale Discussion 62 for he convection. Clearing ahead has resulted in marginal istability leading to convective showers producing gusty winds and small hail.
The front moves through from west to east overnight... the clouds dissipating will be the sign that the cold front is moving through. Little change in temps. but its passage causes a drop to the 30s on Wed.
Long-range:
High builds in for Tues and Wed; the front moves through Thursday and Fridau. Ahead of warm front is clouds then rain (sleet mixing in cannot be ruled out during the early AM.). The front will move N&E. the cold front will move through - upper levels will cool below freezing in the western half of PA.
-Jaron Breen
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