Windshift, Heat Builds This Week.July 16th, 2013 at 8:40 am by Jeremy Wheeler under Weather
Well it’s been hot lately, but not too bad. In fact if we stay on this track, then we’ll probably end up very close to an average Summer for temperatures. More on that in a moment. First, let’s talk about today’s forecast. We had quiet weather overnight and early this morning, but we did have a pocket of clouds move in from the northeast. There were also a few showers out there, but they were mainly offshore.
There is a subtle windshift line that is north of this area that will slowly push through Hampton Roads later today. Temperatures will climb into the low 90s before this happens in many of our cities. The heat index will be up to the upper 90s during the peak heating. As the windshift line comes through it will drop the temperatures slightly near the shore. The chance for rain today is 30%. Our Future Trak model does show some rain during the afternoon:
It actually throws in some isolated showers by noon, but I think that will be limited. Overall there is a large area of high pressure around, but this weak trough will briefly affect our weather today. Tomorrow the boundary will wash out as it tries to go back north. This will allow for the heating to commence for the region. Highs tomorrow will be in the low 90s with partly cloudy skies.
This time of year the average high is in the upper 80s to near 90. This is the highest average temperature for Hampton Roads during the year.
While this is true mathematically, we still sometimes have our hottest weather in August. Remember climate is an average of weather history. I’ve even seen some years where the heat continues into September. We will see highs in the low-to-mid 90s for the next 5 days. Highs will be closer to the mid 90s by Thursday. The heat index (red bars below) will start rising to over 100 by then too.
When you start getting a heat index over 100, then it starts getting dangerous for working or playing outside for long periods of time. Your body has to work harder to stay cool when it’s humid outside. This is because the sweat is less effective at cooling. We’ll focus on the heat more over the next couple of days.
Meteorologist: Jeremy Wheeler