Tuesday Morning Forecast, July 29, 2014

Tuesday Morning Forecast, July 29, 2014

Cool again today.

TODAY WILL BE UNSEASONABLY COOL BY LATE JULY STANDARDS ONCE AGAIN, SO YOU MAY WANT TO GRAB A SWEATER OR LIGHT JACKET, ESPECIALLY FOR THIS MORNING.  HIGHS TODAY WILL BE IN THE UPPER 60s IN SOME OF THE NORTHWESTERN RIDGES ALONG ROUTE 219 AND NORTH OF THE INTERSTATE 80 CORRIDOR.  TEMPERATURES TO THE SOUTH AND EAST IN LOCATIONS SUCH AS HUNTINGDON, BEDFORD AND ALTOONA WILL BE IN THE LOW 70s.  CLOUDS WILL BREAK FOR OCCASIONAL SUN AT TIMES.  WHEN THERE IS COOLER AIR ALOFT (LIKE THERE IS THIS WEEK), ONCE THE SUN COMES UP, DAYTIME HEATING CAN LEAD TO INSTABILITY CLOUDS AND PERHAPS A SHOWER.  THAT OCCURS BECAUSE THE SUNSHINE HEATS THE AIR AT THE SURFACE CAUSING IT TO RISE AND IT CONDENSES QUICKLY IN THE COOLER AIR ALOFT CAUSING CLOUDS TO BUILD AND OCCASIONALLY A SHOWER.  THERE IS JUST A SLIGHT CHANCE FOR THUNDER. FOR THAT REASON, IT IS A GOOD IDEA TO KEEP AN UMBRELLA HANDY AS YOU HEAD OUT FOR THE DAY.  OFTEN TIMES THE SUNSET ALLOWS CLOUDS TO DISSIPATE.  TEMPERATURES WILL BE COOL DURING THE OVERNIGHT HOURS FOR MUCH OF THIS WEEK AS WELL WITH LOWS RANGING FROM THE UPPER 40s IN SOME SPOTS TO THE LOW 50s OTHERS.  BECAUSE OF THE TROUGH IN THE JETSTREAM WE WILL CONTINUE TO SEE THE CHANCE FOR A SHOWER OR STORM NEARLY EVERYDAY THIS WEEK.  OTHERWISE WE'LL HAVE CLOUDS WHICH WILL OCCASIONALLY BREAK FOR SUNSHINE.  MUCH OF THE WEEK WE WILL BE RUNNING BETWEEN TEN TO FIFTEEN DEGREES BELOW WHAT WE WOULD TYPICALLY EXPECT TO SEE FOR THIS TIME OF THE YEAR.  AS A RIDGE STARTS TO BUILD AGAIN IN THE JETSTREAM FOR THE LATE WEEK INTO THE WEEKEND, TEMPERATURES WILL FINALLY START TO WARM BACK INTO THE LOW TO MID 80s.  HOWEVER, EVEN THOUGH TEMPS WILL START TO BECOME A BIT WARMER, THE CHANCE FOR SOME SCATTERED SHOWERS AND STORMS WILL STILL PERSIST ON FRIDAY AND SATURDAY AS WELL. 

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