Subj : HVYSNOW: Probabilistic Heavy Snow And Icing Discussion
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Apr 11 2024 06:34:05

FOUS11 KWBC 110633
QPFHSD

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
233 AM EDT Thu Apr 11 2024

Valid 12Z Thu Apr 11 2024 - 12Z Sun Apr 14 2024

....California...
Day 3...

An upper low west of British Columbia will drop south-southeastward
over the next couple of days, paralleling the West Coast and
spreading some light snow into the Olympics/Cascades. By Saturday
evening into early Sunday, the closed low will turn east into
NorCal where it may start to stretch/deform along a NE-SW axis.
Southwest flow ahead of it will draw in moisture from the Pacific
into NorCal and the Sierra, with modest PW anomalies (+1 to +2
sigma) and IVT around the 97-98th percentile (200-300 kg/m/s) on
day 3. Without a tap to the subtropics, QPF/snow amounts will be
modest, but still appreciable. Snow levels will start high -- above
6000ft -- then drop to about 4500ft over the Sierra by early Sunday
(perhaps 4000ft over the NorCal ranges around Redding). WPC
probabilities for at least 6 inches of snow are highest in the
central Sierra, generally >50% above 6000ft or so.

For days 1-3, the probability of significant icing is less than 10
percent.

Fracasso





$$

= = =
To unsubscribe from WX-STORM and you already have a login, go to
https://lists.illinois.edu and use the "Unsubscribe" link.  Otherwise email
Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

--- SBBSecho 3.20-Linux
 * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)

.