Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Snow this morning and again Christmas morning

Snow this morning, mainly over the southwest. The heaviest snow will be across the Midcoast region with very difficult travel. Snow will taper off midday. A new low will give around 2 inches of snow across the area Christmas Morning, then windy and colder late Christmas day.

Coastal Flooding --- Fire --- Flooding --- Heat --- Thunderstorms --- Tropical --- Winter

	W et Bulb Globe Temperature Wet Bulb Globe Temperature (WBGT) is a measure of the heat stress in direct sunlight, which takes into account: temperature, humidity, wind speed, sun angle and cloud cover (solar radiation). This differs from the heat index, which takes into consideration temperature and humidity and is calculated for shady areas. For more background info on WBGT, click here.		Local Heat Graphics & Information Designed for the public and decision makers, this page gives the Heat Index and Wet Bulb Globe Temperature forecasts for our local area and provides explanations and links to their use for decision making.
	3-Day Maximum Apparent Temperature Map displays the 3 day maximum apparent temperatures. Map gets updated every time the NWS in Caribou produces a new grid.		Day 1 Maximum Temperature Map displays the maximum temperature for day one. Map gets updated every time the NWS in Caribou produces a new grid.

	Day 2 Maximum Temperature Map displays the maximum temperature for day two. Map gets updated every time the NWS in Caribou produces a new grid.		Day 3 Maximum Temperature Map displays the maximum temperature for day three. Map gets updated every time the NWS in Caribou produces a new grid.

Hazards Assessment	Weather Hazards Map displays active watch, warnings, advisories and short term forecasts in the lower 48 states. Map automatically refreshes every five minutes. Loop of sea-level pressures and fronts through day 7	National Forecast Maps	Surface Analysis The Weather Prediction Center (WPC) produces surface maps which depicts the analysis of highs, lows, fronts, troughs, outflow boundaries, squall lines, and drylines.