The figure above indicates the forecasted high in orange (with error bar denoting the range of ensemble forecast members), average high for this time of year in orange (dashed line), forecasted low in blue (with error bar), average low this time of year in blue (dashed line), and forecasted wind speed in purple. Note that the wind speed forecast is sustained wind (not gusts), and it is based on only one model (not an ensemble).
A strong, cold upper-level trough is digging southward along the West Coast and into the Southwest today. An associated surface cold front will move into Arizona tonight, bringing with it much colder temperatures and very windy conditions. Wind gusts this afternoon and evening should reach about 40 mph. A second disturbance will move through on Wednesday – Thursday, keeping the temperatures cool and unsettled.
Although there is a slight possibility of light rain or even snow showers with both of these systems, accumulations (if any) will be light. The biggest threats will be reduced visibility from blowing dust and a hard freeze on Tuesday Night - Thursday Night (so protect your fruit blossoms!)
By this coming weekend, however, the temperatures will warm back up to near normal levels and skies should be clear (although it will likely remain breezy for portions of the weekend, not uncommon for April).
Met Mail is an unofficial weather discussion and forecast transmitted once or twice a week via e-mail by the Embry-Riddle Department of Meteorology (http://meteo.pr.erau.edu/). Embry-Riddle offers an undergraduate bachelor-of-science degree program in Applied Meteorology. Please spread the word to all potential qualified candidates!
ERAU Applied Meteorology degree program
Official National Weather Service forecast