1. Map Review
Richard Grotjahn

22. Between 12z and ‘now’: Satellite loops
IR:
TPW

23. ‘current’ conditions http://hint.fm/wind/ Shows convergence
Shows convergence
& upslope regions

25. NAM/AVN 6hr P (12hr) performance
Imagine the transition between the obs radar maps (upper pair)
Vs The 6 hr totals for two models below.
GFS has band in NW OR that NAM misses. NAM has too much in N. CA & GFS a bit better. So, maybe GFS slightly better with storm in the west coast.
Both models do ok we N. Rockies upslope.
GFS too much in LA, NAM better there. But GFS has SC that NAM misses.
NAM –
6 hr total
GFS –
6hr total

26. The End

27. Notes Precip in west have WAA and PVA for large system just off coast
Upslope over MT/WY/CO front range. Some slight WAA possible.
Further west (ID) have PVA
Lake effect snows east edge of Lakes Erie and Ontario
SE US: little PVA & CAA. But, strong stationary front (analyzed as cold front) so some LL convergence, plus blob of higher PW. Higher (but not huge) CAPE, radar loop shows scattered, isolated cells just behind cold front.