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AGUS76 KRSA 231439
HMDRSA

Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
830 AM PDT Mon Sep 23 2024

...MAINLY DRY THROUGH THE WEEK WITH LIGHT PRECIP POSSIBLE OVER
SMITH AND KLAMATH BASINS ON WEDNESDAY...

.METEOROLOGICAL CONDITIONS (MON AM - SUN AM)...

Ridge of high pressure builds over the region today with a low
offshore of Central CA for warm and dry conditions. Max temperatures
this afternoon generally 5 to 15 degrees above normal for CA and
near normal for Nevada this afternoon.  Ridge center shifts east to
the four corners region and the weakening low moves NE to Nrn CA
coast on Tuesday with continued warm and dry conditions. Max
temperatures around 5 to 15 degrees above normal for most of the
region Tuesday afternoon. A shortwave trough moves into B.C/Pac NW
and into Nrn CA Tuesday night into Wednesday with associated
weakening front possibly brushing the far north portion of the
region for possible light precip over the Smith and Klamath Basins
on Wednesday. This will also bring a deeper marine layer and cooler
temperatures (near normal to 10 degrees below normal) along the
coast and cooler temperatures to most of CA. Max temperatures near
normal to 10 degrees above normal (except below normal along the
Coast) over CA and around 5 to 15 degrees above normal for NV
Wednesday afternoon. Zonal flow across the north and high near four
corners and another low offshore of Srn CA Thursday and Friday. Max
temperatures warm Thursday into Friday to around 5 to 15 degrees
above normal for most of the region.  Another shortwave trough moves
into the Pac NW on Saturday but models vary with how far south it
digs and if the low off CA gets absorbed in it or stays offshore
into Sunday. The 06Z GFS has the trough deeper and splitting with a
low forming off the Nrn CA coast Saturday and moving down the coast
Sunday and inland around Pt Conception on Monday. The 00Z EC is
weaker with the trough and keeps the trough over the Pac NW and the
low spinning off Srn CA coast on Saturday and moving into Srn CA
late Sunday/Monday. The forecast is currently dry for the weekend.


Please Note: This product may NOT be routinely updated Friday
through Sunday between Jun 1 and Oct 1. Please refer to
www.cnrfc.noaa.gov/dailyBriefing.php for a graphical summary of
weather and hydrologic conditions.

QPF graphics are available at www.cnrfc.noaa.gov/qpf.php



Osborne

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