Possible Hail or Thunder Later

March 15, 2011

We could see an active afternoon (assuming we get some sunbreaks later).  By “active” I mean a few spots of thunder or hail…some downpours too.  Check out the Storm Predictition Center’s discussion for the Pacific Northwest this morning:

WHILE MOISTURE WILL REMAIN MODEST /PW OF .50-.75 INCH/… SUFFICIENT INSTABILITY SHOULD DEVELOP TO SUPPORT A FEW EPISODES OF DEEP CONVECTION/STORMS.  DEEP…LARGELY UNIDIRECTIONAL WSW FLOW WITH 700-500 MB SPEEDS OF 50-65 KTS WILL SUPPORT ORGANIZATION OF THE ACTIVITY INTO BANDS…WITH EMBEDDED BOWING STRUCTURES/WEAK SUPERCELLS/LEWPS POSING A THREAT FOR LOCALLY DMGG WIND AND MARGINALLY SVR HAIL.  IN ADDITION…TOPOGRAPHICALLY-BACKED LOW-LVL FLOW IN CSTL VLYS MAY SUFFICIENTLY ENHANCE LOW-LVL DIRECTIONAL SHEAR TO YIELD A THREAT FOR A TORNADO OR TWO..ESPECIALLY IN WRN ORE/SW WA.  WHILE COLD ADVECTION WILL CONTINUE ALOFT…MOST STORMS SHOULD WEAKEN AFTER SUNSET.

Yuck…I hate reading all caps, but I’m sure not going to retype that!  I’d like to see a lot more clearing offshore; nothing is going to happen under this solid cloud cover through the early afternoon at least.

Chief Meteorologist Mark Nelsen