Archive for July, 2012

THE HEAT AND HUMIDITY WILL INCREASE OVER THE NEXT FEW DAYS AS HIGH PRESSURE CONTINUES TO INFLUENCE THE MID-ATLANTIC STATES

Temperatures will slowly increase over the next few days as the Bermuda High remains in place. Our weather will feature high humidity levels, a mix of sun and clouds, and just a slight chance of a shower or thunderstorm each day. In a pattern like this, any storm that does occur could produce heavy rainfall. However, most of the time will be dry and some places won’t receive any rain. Later this upcoming week, a cold front should help to break the heat somewhat.

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THE BERMUDA HIGH WILL INFLUENCE OUR WEATHER FOR THE NEXT FEW DAYS

We’ll have several days with typical summer-like weather thanks to a developing Bermuda high pressure system. South to southwesterly winds will bring up warm and humid air. Although there will be a chance of a shower or storm throughout the period, most of the time will be dry. The weather should be ideal for vacationers this weekend. We may see an increased chance of a shower/storm on Monday as a cold front approaches.

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AN ONSHORE FLOW COMBINED WITH LOTS OF CLOUDINESS KEEPS TEMPERATURES DOWN… BUILDING HIGH PRESSURE FROM THE ATLANTIC WILL BRING WARMER TEMPERATURES OVER THE WEEKEND

For anyone here in Virginia Beach on vacation this week, this week’s weather may not be what they wanted. However, for the folks who live here and work outside, the cooler conditions are welcome. The combination of an onshore flow and the clouds associated with the stalled frontal boundary to our south are causing temperatures to be below seasonal norms. That’s all going to change as high pressure to our south and east is expected to retrograde and build westward. The high is sometimes referred to as the Bermuda High. This high pressure system should bring warmer conditions with very humid conditions. Normally, diurnal convection occurs when we are under the influence of the Bermuda High. That means mainly afternoon and evening thunderstorms for some areas. I also wanted to mention that rip currents are also a problem today (Thursday). So, enjoy the relatively cool weather while it lasts. The heat and humidity will soon return. I’ll have an update on Friday.

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A STALLED FRONTAL BOUNDARY BRINGS HEAVY RAINFALL… WARMER TEMPERATURES ARE EXPECTED THIS WEEKEND

I was away visiting family up north and when I got home yesterday (Tuesday, July 10th), my rain gauge had almost 4 inches of rain in it. Then, early this morning, another 4 inches of rain fell in my Virginia Beach neighborhood! That’s 8 inches of rain in two days. A frontal boundary that is basically stalled just to our south is responsible for the heavy rain. Forecasters believe that rain chances will lessen and we should only see isolated to scattered rainfall today. An onshore flow combined with the cloudiness will keep temperatures cooler. As high pressure builds in this weekend, temperatures should return to warmer levels. I’ll have an update on Thursday.

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THE HEAT CONTINUES AS THERE IS VERY LITTLE CHANGE IN THE OVERALL WEATHER PATTERN… THERE MAY BE A BREAK IN THE HEATWAVE EARLY NEXT WEEK

It’s just more of the same in the weather department: Hot and humid with just a slight chance of a shower or thunderstorm in spots. The high pressure ridge that has been responsible for the heat of late is still in place and is not expected to weaken until early next week. There will, however, be subtle day to day changes but weather forecasters don’t expect a break in the pattern for several days. Many are wondering about their outdoor plans for the 4th of July. Although there could be a shower or thunderstorm today, it is very hard to say what areas will receive the rain. When it is this hot and humid, it doesn’t take much to trigger a thunderstorm. Sometimes a sea breeze can create enough instability to trigger a storm. Other times, upper-level disturbances embedded in the flow aloft can trigger storms. We saw that this past weekend… You’ve probably been following the story about the number of folks in Northern Virginia and Maryland who still do not have power due to Friday night’s storms. They have been dealing with this heat wave without air conditioning. There’s an article in today’s Virginian Pilot about whether utilities should bury electrical lines. I never realized how expensive that was to do. For the most part, only newly developed neighborhoods have power lines buried underground. Well, that’s it for now. Enjoy your holiday and try to stay cool.

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