25 April 2013
The focus for today will continue to be on southern YT and northern BC as the arctic front stalls meeting with the southern Pacific stream and phase with each other. Although there are no reliable obs for snow at night, VXY shows less than 1 cm per hour. Similar intensity appears over WHT so decided not to issue additional snowfall warnings as current forecast of 5 to 10 cm should be right on track. South of the YT border is still in liquid precip by midnight- Current warning regions still look good but the snow will continue through Friday for some of the regions.
00Z REG continue to give near warning amounts for the north coast, probably due to strong orographic upslope enhancement. YPR has been reporting 2.2 m per hour since 00Z, current forecast in effect under-forecast the amount for tonight period but looks ok for the amount for Thursday and Thursday night period.
The ridge will continue to hold over the southern BC today with higher thickness than Wednesday. It could be warmer than Wednesday even for the south coast depending on how much high clouds can spread from the north. The 00Z REG is now showing precip reaching YVR on Friday afternoon (raw scribe is dry) but GFS continue to hold off until overnight hours Friday night. ECMWF is in the middle.
Posted: 25/04/2013 2:17 AM by Robilliard
Front and strong westerly flow aloft will give heavy pcpn to North Coast next 24 hours. Getpcpn for cypr giving warning amnts. Lam looks more reasonable. Have put amnts into fcst but kept it below warning values. Another warm day for Scst. Will see more cloud today but still should see some low 20’s inland away from the water. Kept a temperature range for usual south coast locations. Added low pop to much of south caost late Friay afternoon with steady pcpn coming in Saturday am.