Sunday, July 26, 2009

Severe Thunderstorm Watch Until 9 PM

A Severe Thunderstorm Watch has been issued for most of central and eastern Virginia and is in effect until 9 PM. The strongest storms will be capable of damaging winds and very large hail. Although the threat is low, a brief weak tornado could also form.


Sunday's Severe Potential

A cool front will move into the area early this afternoon and ignite a few thunderstorms between 1 to 3 PM.


(Surface dew points and winds)

There is plenty of energy in the atmosphere to fuel these storms, so they could rapidly become severe.


(Surface-based CAPE)

The strongest storms will be capable of damaging winds and hail as large as quarters. More than likely these storms will gel into a squall line and race into the Atlantic later tonight. We will be tracking this through the day and will have more updates in the afternoon.

Saturday, July 25, 2009

Summer Pattern Developing

It's been a relatively mild Summer thus far, with below normal temperatures and humidity levels.  It looks like that is about to change.  A Bermuda High will develop over the next several days, which will bring a steady flow of moisture into central Virginia.  The result will be dew points increasing from the low 60s to the low 70s over the next few days, which will have a considerable effect on the comfort factor of our weather.  Expect lows at night to stay in the low 70s and highs to top out near 90.  Occasional disturbances embedded within a persistent southwest flow regime will trigger showers and thunderstorms each afternoon and evening.  We will be in somewhat of a weather "rut" over the next week or so.