Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 402 PM EDT Wed May 21 2014 Valid 00Z Thu May 22 2014 - 00Z Sat May 24 2014 ...Severe thunderstorms possible Wednesday evening along the I-70 corridor from Baltimore to Denver... ...Much needed precipitation for some of the drought stricken regions of the southern to central High Plains... Widespread rain and thunderstorms will continue to fire up with a surface wave crossing the Great Lakes and it's trailing cold front pushing southeastward from the Ohio Valley to the Mid-Atlantic coast. The tail end of the boundary should slowly sink southward through the Nation's mid-section...serving as another focal point for convection. Storms developing along the front will be tapping into a warm and juicy airmass and will have the potential to become strong to severe. This should impact locations along the I-70 corridor from Baltimore to Denver. Cool and unsettled weather is expected beneath an expansive closed vortex moving in over the southwestern U.S.. The upper low will be weakening with time...keeping precipitation scattered and light across California and the Four Corners region. However...as the vortex gradually edges east and moisture streams north out of the western Gulf of Mexico...some heavier and much needed precipitation should develop across the drought stricken regions of the southern to central High Plains. Elsewhere across the Nation...a cold front will trigger light shower activity over the Northwest as it approaches the West Coast on Thursday and pushes inland on Friday. Gerhardt Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php