Cooler Temps Return
Sunday, July 21, 2013
Today officially marked the end of our week long heatwave. Cooler temperatures have worked their way into New England, with many areas seeing temperatures in the upper 70s and low 80s today. Another noticeable difference today was the change in humidity, where dew points hovered in the low to mid 60s, providing for a nice, comfortable air mass.
These temperatures are expected to stay with us for most of this week. A pre-frontal trough will move on through Tuesday bringing with it some rain and scattered thunderstorms. Humidity will be a bit higher as well with a S/SSE wind. The proceeding front is expected to be a slow moving one, as an area of high pressure sits off the East Coast which serves as a "block". Because of this, mostly cloudy skies and scattered showers are expected. A chance for thunderstorms return on Wednesday, when the actual front itself moves through. Tuesday and Wednesday night will be cool, with lows in the 60s.
Thursday and Friday look nice and dry with partly sunny skies (thinking mostly cloudy along the coast), as we will be behind the cold front, assuming it moves far enough offshore. In the event this front doesn't move far enough east, partly to mostly cloudy skies with isolated showers would still be in the cards, especially for coastal areas, however model consensus is pretty good right now having it offshore.
For this weekend, temperatures in the 80s should return along with the dew points, and still cannot rule out a chance of scattered showers.
Today officially marked the end of our week long heatwave. Cooler temperatures have worked their way into New England, with many areas seeing temperatures in the upper 70s and low 80s today. Another noticeable difference today was the change in humidity, where dew points hovered in the low to mid 60s, providing for a nice, comfortable air mass.
These temperatures are expected to stay with us for most of this week. A pre-frontal trough will move on through Tuesday bringing with it some rain and scattered thunderstorms. Humidity will be a bit higher as well with a S/SSE wind. The proceeding front is expected to be a slow moving one, as an area of high pressure sits off the East Coast which serves as a "block". Because of this, mostly cloudy skies and scattered showers are expected. A chance for thunderstorms return on Wednesday, when the actual front itself moves through. Tuesday and Wednesday night will be cool, with lows in the 60s.
Thursday and Friday look nice and dry with partly sunny skies (thinking mostly cloudy along the coast), as we will be behind the cold front, assuming it moves far enough offshore. In the event this front doesn't move far enough east, partly to mostly cloudy skies with isolated showers would still be in the cards, especially for coastal areas, however model consensus is pretty good right now having it offshore.
For this weekend, temperatures in the 80s should return along with the dew points, and still cannot rule out a chance of scattered showers.
Saturday New England Severe Threat
Sunday, July 14, 2013
For those who have punted this summer weather-wise, this may get your attention...
Today, the Storm Prediction Center (SPC) issued a severe weather outlook for New England this upcoming Saturday. While this doesn't sound exciting, it's actually something that garners attention given the SPC doesn't usually issue something like this for New England this far out.
In regards to what the models are saying, the GFS, Euro, and Canadian have all been persistent on the idea of a trough sweeping down from SE Canada. What is also good to see are the wind fields associated with this trough. With strong low to mid level jets (winds) present, things could definitely stir. Bulk shear values (vertical wind difference over a specific area) are hinting for at least 35-40 kts which is favorable for the development of supercells, which can spawn tornadoes. Wind crossovers look good as well but I would like to see more veering with height, which is how you get rotation.
A few more ingredients that will be present are:
For those who have punted this summer weather-wise, this may get your attention...
Today, the Storm Prediction Center (SPC) issued a severe weather outlook for New England this upcoming Saturday. While this doesn't sound exciting, it's actually something that garners attention given the SPC doesn't usually issue something like this for New England this far out.
In regards to what the models are saying, the GFS, Euro, and Canadian have all been persistent on the idea of a trough sweeping down from SE Canada. What is also good to see are the wind fields associated with this trough. With strong low to mid level jets (winds) present, things could definitely stir. Bulk shear values (vertical wind difference over a specific area) are hinting for at least 35-40 kts which is favorable for the development of supercells, which can spawn tornadoes. Wind crossovers look good as well but I would like to see more veering with height, which is how you get rotation.
A few more ingredients that will be present are:
- Dew points will be in the upper 60s and low 70s
- Temperatures in the lower 90s
- CAPE values (amount of atmospheric energy available) between 1500-2000 J/kg
- Mid level lapse rates 6.0-7.0C (indicative of mid level instability)
- High Theta-E values (340-350K) (also indicative of instability)
Heat and Humidity to Return Next Week
Friday, July 12, 2013
With finally some cooler weather today and tomorrow, the heat and humidity will once again return next week. A large area of high pressure will be the dominating factor for much of the United States, bringing scorching temperatures for basically everyone, regardless of where you live.
In regards to setup there are currently two areas of high pressure. One over the United States, and one over the Western Atlantic. These two high pressure cells basically merge, creating one large area of high pressure. As the Western Atlantic Ridge moves west, winds will veer from southerly, to west, to northwest at times, streaming in dew points that could exceed 70F (when winds are predominately southerly). In summary, temperatures will be in the upper 80s and low 90s with mostly sunny skies and dew points in the high 60s and low 70s. A few scattered showers and thundershowers cannot be ruled out with this type of heat and humidity as well.
With finally some cooler weather today and tomorrow, the heat and humidity will once again return next week. A large area of high pressure will be the dominating factor for much of the United States, bringing scorching temperatures for basically everyone, regardless of where you live.
In regards to setup there are currently two areas of high pressure. One over the United States, and one over the Western Atlantic. These two high pressure cells basically merge, creating one large area of high pressure. As the Western Atlantic Ridge moves west, winds will veer from southerly, to west, to northwest at times, streaming in dew points that could exceed 70F (when winds are predominately southerly). In summary, temperatures will be in the upper 80s and low 90s with mostly sunny skies and dew points in the high 60s and low 70s. A few scattered showers and thundershowers cannot be ruled out with this type of heat and humidity as well.