Monday, August 17, 2015

No news... good news?

SPC current day 3 convective outlook maintains a slight risk over lower Michigan
The GFS and NAM continue their dispute as to whether or not the surface low on Wednesday is going to speed up and deepen into a negatively tilted monster.  The Storm Prediction Center puts it perfectly:

   A COMPLEX FORECAST SCENARIO PERSISTS ACROSS THE GREAT LAKES/MIDWEST
   REGION DAY 3 /WED. AUG. 19/...WITH THE COMBINATION OF
   LIKELY-TO-BE-WIDESPREAD ONGOING CONVECTION AT THE START OF THE
   PERIOD ALONG WITH MODEL DIFFERENCES WITH RESPECT TO STRENGTH AND
   SPEED OF THE SURFACE LOW/FRONTAL SYSTEM.  THE GFS REMAINS
   SIGNIFICANTLY STRONGER/DEEPER WITH ITS SURFACE LOW /OVER THE WRN
   UPPER GREAT LAKES REGION/...AND FASTER WITH ITS TRAILING FRONTAL
   PROGRESSION ACROSS THE MIDWEST/OH VALLEY STATES.  MEANWHILE...THE
   NAM DEPICTS A MUCH SLOWER FRONT...TRAILING SWD FROM A MUCH WEAKER
   LOW.

There you have it.  Clear as mud.  We likely won't know just what we're going to be looking at until the shorter term models like the NAM4KM, RAP, and HRRR get closer to crunch time.  I'll be traveling Wednesday but I'll attempt to post updates via mobile if anything significant does look like it's going to happen.

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