Crunchy Numbers!

Weekend rain possible for Texas. GFS 9/26/12 12Z Hour 81

The first day of weather observations for my two cities are in! In Chicopee Falls, the forecast got the high temperature exactly (73) and over-forecast the low by 3 degrees (37 forecast, 34 observed). In Fort Worth,  the forecast was under by 5 degrees for the high (90 forecast, 95 observed), and under 1 degree on the low (70 forecast, 71 observed). As the days go by, I'll have a better set of corrections to use to adjust my forecast.

Now for your updated forecast:

Chicopee Falls (KCEF):

The temperature trend hasn't changed much from the last forecast, so the focus is going to be on the rain for Friday into Saturday. The chance for rain is 70-80%, more likely than not. Also, the rain intensity has been upgraded to a quarter- to half-inch each day. Light showers are still in the forecast for Sunday and Monday.

Fort Worth (KFTW):

Hot weather continues for Texas. The next two days are forecast to hit 90, but with the five-degree bump mentioned above, we could see temperatures well into the 90's. A strong cold front brings showers and thunderstorms in for Saturday, but there are still some doubts on the rate of rainfall. Once the front passes, temperatures will be about 10 degrees cooler for Sunday. Temperatures will moderate to the lower 80's for the start of the next work week.