The SCCA Runoffs will be held at beautiful VIR this year, and the weather looks great for most of the event. Only Tuesday's qualifying sessions will have a threat of rain, and temperatures throughout the event will be very pleasant.

A cold front will pass through the VIR area on Monday, and surface high pressure will build in behind it. However, there will be an upper level disturbance that will follow the front on Monday night and Tuesday morning. This disturbance in the upper levels could bring a few scattered showers to the VIR area as qualifying begins on Tuesday, mainly during the morning hours. Any rain that falls will likely be light, maybe around a tenth of an inch all day. 

Through the rest of the week, high pressure will be centered over New England and southeastern Canada, extending southwest along the east side of the Appalachian Mountains. This will keep a northeast wind across Virginia and North Carolina, providing comfortable temperatures and low humidity. There will be a gradual warming trend as the weekend approaches, with highs peaking in the upper 70s on Saturday as the high loses its grip and a southwest wind develops.

Another cold front is expected to cross the area on Saturday night, which will drop temperatures again for Sunday. Right now, it looks like this frontal passage will be dry, and highs on Sunday will be in the lower 70s. That is still far out in the forecast, and this front does look like it will be quite strong, so temperatures on Sunday may end up being cooler than that.

Check back through the week for updates.

By: Stephen McCoy

Minor changes to temperature in this update with warmer weather expected for Saturday. Sunday's conditions will begin mostly clear, though as the day progresses cloud cover will slowly move in due to southwesterly winds in the upper levels ahead of an upper level trough. Partly cloudy skies are anticipated for the Grand Prix, though heavier cloud cover will move in for the remaining on-track sessions. Northwesterly winds overnight and into the morning on Sunday will cause a cooler high for the day relative to the rest of the weekend. Fog remains a possibility for all three days, though Friday remains the most likely for foggy conditions during the morning.

By: Stephen McCoy

It'll be a nice weekend to be in California for the INDYCAR season finale, though a bit cooler than this previous weekend's IMSA race at WeatherTech Raceway Laguna Seca. A cold front moving through the region on Monday and a second cold front moving through on Wednesday will cool temperatures to the mid 70's F for the weekend as surface winds bring air in from the northwest off the Pacific. Conditions will be clear for much of the event due to dry air, also from the northwest, entering into the region through the mid-to-upper levels.

Fog is possible each day, but largely depends on the direction of the surface winds. If they come off the mountains to the east and southeast, nothing to worry about. But northwesterly winds during the morning will bring moisture off Monterey Bay and could result in fog during the morning. Friday currently looks more likely than the rest of the weekend as light to no wind will be present before increasing into the afternoon.

By Doug Schneider

Not much has changed in the forecast for WeatherTech Raceway Laguna Seca this weekend. No rain is expected through the event, with temperatures starting off warm on Friday but getting cooler each day. The one change to the forecast is to bring in more cloud cover on Sunday, associated with the upper level trough that will be approaching the area. It does not appear that there will be enough moisture for rain, just some partial cloud cover. This trough will also help cool temperatures to the lower to mid 70s on Sunday. It should be a great weekend for racing.

By Doug Schneider

Beautiful California weather is expected this weekend as IMSA visits WeatherTech Raceway Laguna Seca. Sunny skies are expected each day, with pleasant temperatures. There will be a cooling trend each day, with Friday reaching the mid 80s, cooling to highs in the mid 70s on Sunday. This is due to an upper level trough that will be approaching, although it won't have enough moisture to produce rain, or even clouds. 

One thing to watch for as we get closer to the weekend will be morning fog or low clouds. Fog can be pretty common at Laguna Seca if the wind direction and ocean-land temperature difference are right. At this time I think it is unlikely to have any impact, so I'm keeping it out of the forecast.