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FXUS66 KHNX 100842 AFDHNX

Area Forecast Discussion National Weather Service Hanford CA 1242 AM PST Sun Dec 10 2023

SYNOPSIS
Areas of fog will develop in the San Joaquin Valley early this morning. Sub-freezing temperatures as low as 28 degrees are expected in rural areas of the San Joaquin Valley each night and early morning today into Wednesday morning. A warming trend is anticipated Wednesday through Saturday. Dry weather will persist through at least the next seven days.

DISCUSSION
Areas of fog will develop in the San Joaquin Valley early this morning. The High Resolution Ensemble Forecast guidance depicts a moderate probability (50 percent) of this fog becoming dense.
Patchy fog may form in the San Joaquin Valley tonight. The High Resolution Ensemble Forecast guidance depicts a moderate probability (30-40 percent) of this fog becoming dense.

A ridge of high pressure over the Western United States will progress eastward today. A trough of low pressure will move eastward across the Pacific Northwest tonight. An area of low pressure aloft may develop over the Great Basin in the base of this trough Monday. This cyclone aloft will move southward Tuesday and Wednesday, before progressing eastward across the Desert Southwest Thursday. Meanwhile, a ridge of high pressure will build northward over the Golden State Thursday through Saturday. Dry weather will persist across Central California for at least the next seven days.

Sub-freezing temperatures as low as 28 degrees are anticipated in rural areas of the San Joaquin Valley each night and early morning today into Wednesday morning. A Freeze Warning is in effect until 8 AM PST Wednesday morning. High temperatures each afternoon today through Tuesday will be two to four degrees above normal for this time of year. A warming trend is expected Wednesday through Saturday. By Saturday afternoon, maximum temperatures will be eleven to thirteen degrees above their typical values for the middle of December.

AVIATION
IFR or lower conditions are possible in parts of the San Joaqin Valley until 18Z this morning due to mist and fog. VFR conditions will prevail across Central California this afternoon and this evening. MVFR visibilities are possible in the San Joaqin Valley tonight due to mist.

AIR QUALITY ISSUES
On Sunday, December 10th, 2023, fireplace/wood stove burning status is: no burning unless registered in Fresno, Kern, Kings, Madera, and Tulare Counties. Burning discouraged in Merced County, as well as in Kern (Greater Frazier Park Area) and Sequoia National Park and Forest.

CERTAINTY
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is high.

Certainty levels include low, medium, and high. Please visit www.weather.gov/hnx/certainty.html for additional information and/or to provide feedback.

HNX WATCHES/WARNINGS/ADVISORIES
Freeze Warning until 8 AM PST Wednesday for CAZ301>303-305-306- 309>312-315.

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