The temperature reached 100 degrees on the thermometer at Palmerton Pharmacy at 2:46 p.m. Thursday. Temperatures are expected to reach 90 degrees daily through Sunday, when thunderstorms are expected.

Here is the latest forecast:

This Afternoon: Mostly sunny, with a high near 91. Southwest wind around 5 mph.

Tonight: A slight chance of showers and thunderstorms before 8 p.m., then a slight chance of showers between 8 p.m. and 9 p.m. Patchy fog after 2 a.m. Otherwise, mostly cloudy, with a low around 70. Northwest wind around 5 mph becoming calm. Chance of precipitation is 20%.

Saturday: A slight chance of showers between noon and 2 p.m., then a slight chance of showers and thunderstorms after 2 p.m. Patchy fog before 8 a.m. Otherwise, mostly sunny, with a high near 90. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 20%.

Saturday Night: A slight chance of showers and thunderstorms before 2 a.m. Partly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.

Sunday: A chance of showers and thunderstorms after 2 p.m. Partly sunny, with a high near 92. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday night: Showers and thunderstorms likely, mainly between 8 p.m. and 2 a.m. Patchy fog after 2 a.m. Otherwise, mostly cloudy, with a low around 67. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday: A chance of showers and thunderstorms before 8 a.m., then a chance of showers and thunderstorms after 2 p.m. Patchy fog before 8 a.m. Otherwise, mostly sunny, with a high near 86. Chance of precipitation is 40%.

Monday Night: A chance of showers and thunderstorms before 8 p.m. Mostly clear, with a low around 60. Chance of precipitation is 30%.

Tuesday: Sunny, with a high near 87.

Tuesday Night: Partly cloudy, with a low around 63.

Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 30%.

Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.

Thursday: Partly sunny, with a high near 84.