The science pros at TKOR demonstrate how to make a 3-penny battery for DIY power on a budget.

A public affairs specialist for the NWS at Silver Springs, Maryland, did not respond to a request for comment by deadline.

Sunday's weather will be a mix of sunny and partly cloudy skies with highs on the cooler side, near 70 degrees. Overnight a severe geomagnetic storm will give the Philadelphia area and Delaware Valley ...