ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 160653
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1253 AM CST Sat Jan 16 2021
Valid 171200Z - 181200Z
...Synopsis...
Upper-level ridging is forecast to build eastward from the West
Coast into the inter-mountain West on Sunday. As this occurs,
surface high pressure will migrate southeastward from the Pacific
Northwest into the northern Great Basin before weakening late in the
day. This will maintain offshore pressure-gradient flow across
southern California at least for the first half of the day.
Elsewhere, cool conditions with relatively weak pressure gradient
winds will limit widespread fire weather concerns.
...Southern California...
Early morning guidance suggests that breezy conditions (sustained
winds near 15-25 mph) may be ongoing at the start of the period
Sunday morning due to the maintenance of a -5 to -7 mb LAX-DAG
pressure gradient as the aforementioned surface high builds
southward. Upper-level support for strong winds will likely wane
through the day as the upper-level ridge shifts east/southeastward,
but wind gusts up to 45 mph for wind-prone locations appear possible
during the morning hours. While RH recoveries will be minimal
overall, ensemble guidance does suggest that slightly cooler
temperatures may keep RH values in the upper teens to 20s during the
morning hours coincident with the strongest winds. RH values will
likely fall further in the afternoon, but it is uncertain how long
the strong winds will persist and temporally overlap with more
favorable RH. Overall, elevated fire weather conditions appear most
likely due to the limited temporal overlap of critical wind/RH
thresholds. However, localized/transient critical conditions will be
possible during the morning hours and could be more widespread if
strong winds can persist into the afternoon hours.
..Moore.. 01/16/2021
...Please see www.spc.noaa.gov/fire for graphic product...
CLICK FOR DAY 2 FIREWX AREAL OUTLINE PRODUCT (KWNSPFWFD2)