Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
255 AM EDT Sat Apr 18 2015
Valid 12Z Sat Apr 18 2015 - 12Z Mon Apr 20 2015
...Episodes of severe weather including flash flooding will be possible
this weekend from the central and southern plains into and across the
lower-middle Mississippi valley...
...Lingering snow showers over the central Rockies to end tonight..
A strong spring storm system over the central Rockies will be partially
responsible for an active weekend of weather across the central and
southern part of the lower 48. A favorable combination of deep moisture
from the Gulf of Mexico, instability and wind shear are expected to be in
place out ahead of a mid-level cyclone currently over the central Rockies.
The potential for tornadoes, large hail, strong winds and flash flooding
will be in place at times throughout the weekend out ahead of an advancing
Temperatures directly beneath this storm system are cold enough to support
higher elevation snow across Colorado and Wyoming, but as the storm system
departs into the Great Plains tonight, snow showers will come to an end.
The greatest threat for flash flooding will be today and tonight from the
upper Texas coast to the Florida panhandle, where recent heavy rains have
made for saturated soils which will again see a threat for excessive
Regarding temperatures, highs today will be well into the 70s with a few
pockets of lower 80s from the Midwest to the Mid-Atlantic states, but much
cooler weather is expected here for Sunday along with some rain.
Temperatures will fall to 5 to 15 degrees below average across the central
U.S. in the wake of the cold front referenced above. The western U.S. will
continue to see mild temperatures of 10 to 15 degrees above average under
fair skies and upper level ridging aloft.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php