Clouds and showers hung around most of the day kept showers cooler than normal. Highs today is just a taste of what most of next week is expected to be like. Tomorrow sunshine will return and so will warmer temperatures. Sunshine and highs in the 70s will continue into the weekend.
Most of next week highs will only reach the 60s. A deep upper level trough will pull cooler air from Canada south. Here is the what the 500 mb trough looks like from the GFS model.
The morning low temperatures on Wednesday could drop as low as the upper 30s. Now that we are getting to that time of year many people ask “when do we usually have our first frost?”. Well, the map below shows the average date of the first 32F temperature during the fall season. The map below is based on data from the 30 year climate data. Notice this was last updated in 2000. The new 30 year data (1981-2010) is out but, I am waiting to hear from the State Climatologist/NWS to see if this map has changed any. I will post the updated map when it is released.
Posted under Temperatures
This post was written by Schnack on September 13, 2012