1941 - One of the greatest aurora borealis or northern lights ever observed in the central Atlantic and mid-central portions of the U.S. occurred on the night of September 18-19th. The displays continued from twilight until just before dawn and were observed as far south as Florida and southern California.
More on this and other weather history
Night: Mostly cloudy, with a low around 56. West wind around 1 mph.
Day: A slight chance of rain showers between 11am and 5pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 80, with temperatures falling to around 73 in the afternoon. South southwest wind 1 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Night: A chance of showers and thunderstorms before 3am, then patchy fog and a chance of showers and thunderstorms between 3am and 5am, then patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 57. West southwest wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Day: Areas of fog and a slight chance of rain showers before 11am. Partly sunny, with a high near 78. South southwest wind 1 to 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Night: Areas of fog after 9pm. Partly cloudy, with a low around 56. West southwest wind 0 to 6 mph.
Day: Areas of fog before 10am. Mostly sunny, with a high near 79.
Night: Areas of fog after 10pm. Partly cloudy, with a low around 55.
Day: Areas of fog before 9am. Mostly sunny, with a high near 83.
Night: Mostly clear, with a low around 56.
Day: Patchy fog between 7am and 8am. Sunny, with a high near 88.
Night: A chance of rain showers after 11pm. Partly cloudy, with a low around 57.
Day: A chance of rain showers and patchy fog. Partly sunny, with a high near 77.
Night: A slight chance of rain showers before 9pm, then areas of fog and a slight chance of rain showers. Mostly cloudy, with a low around 58.
Day: Areas of fog before 10am. Mostly sunny, with a high near 77.
Upper drawbridge, Petaluma River
(5.7 miles away)
Lakeville, Petaluma River
(8.8 miles away)
Wed's High Temperature
114 at Death Valley, CA
Wed's Low Temperature
21 at Peter Sinks, UT
Penngrove is a census-designated place (CDP) in Sonoma County, California, United States, situated between the cities of Petaluma and Cotati, at the foot of the western flank of Sonoma Mountain. It is part of the North Bay subregion of the San Francisco Bay Area. The population was 2,637 at the 2020 census.
The area is the site of a historic grove called Penn's Grove; it was formerly a freight station on the Northwestern Pacific Railroad and a center of egg and chicken farming.
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