Mesoscale Precipitation Discussion 0595
NWS Weather Prediction Center College Park MD
647 PM EDT Fri Aug 03 2018

Areas affected...Central MA...Southern VT and NH...Southern ME

Concerning...Heavy rainfall...Flash flooding POSSIBLE

Valid 032245Z - 040200Z

SUMMARY...Expect showers and thunderstorms to continue to train
across the area over the next few hours, producing additional
locally heavy amounts.  Additional flash flooding is possible.

DISCUSSION...Deep unidirectional flow and high PWs along a
slow-moving boundary will continue to support training convection
into the evening hours.  Latest SPC mesoanalysis shows PWs 1.75-2
inches, along with deep southwesterly flow coincident with a
quasi-stationary boundary extending across the highlighted region.
 This moisture in addition to ample instability along and south of
the boundary is expected to support further training, producing
additional locally heavy amounts over the next few hours. 
Neighborhood probabilities from the 18 UTC HREF Mean suggest a
significant threat for additional hourly amounts of an inch or
more over the next few hours, before waning after 01 UTC.

Pereira

ATTN...WFO...ALY...BOX...GYX...

ATTN...RFC...NERFC...

LAT...LON   44576906 44116907 43727001 43447040 43027084
            42637117 42267185 42177326 42857306 43257175
            44067082 44486977