####018005406#### ACUS44 KWBC 211445 SCCNS4 Storm Summary Number 3 for Heavy Rainfall and High Wind Associated with Post-Tropical Cyclone Hilary NWS Weather Prediction Center College Park MD 800 AM PDT Mon Aug 21 2023 ...Widespread heavy rainfall and strong winds to focus across the Great Basin today and portions of the Northern Rockies today as Post-Tropical Cyclone Hilary's tracks north... High Wind Warnings extend across portions of the Great Basin and Northern Rockies. Flash Flood Warnings are in place across portions of Southern California. Flood Watches extend across Southern California northward into the Great Basin and interior Northwest. For a detailed graphical depiction of the latest watches, warnings and advisories, please see www.weather.gov At 700 AM PDT...Latest surface observations and regional radar mosaic show widespread moderate to heavy rainfall has shifted northward into the Great Basin and Northern Rockies, although lingering shower activity is noted across Arizona and Southern California. The expansive shield of rainfall remains tied to a plume of tropical moisture associated with Post-Tropical Cyclone Hilary, analyzed with a position of 40.6N, 118.0W at 5AM PDT. Note: rainfall observations for California and Arizona were collected beginning this Friday at 7 AM PDT, while observations over Nevada were collected starting Saturday at 7 AM PDT. ...Selected preliminary Storm Total Rainfall in inches from 700 AM PDT Fri Aug 18 through 700 AM PDT Mon Aug 21... ...ARIZONA... HILLTOP 2.10 TWEEDS POINT 1.67 LINDBERGH HILL 1.54 BLACK HILLS 1.47 YELLOW JOHN MOUNTAIN 1.35 MUSIC MOUNTAIN 1.17 PARKER 1.11 YUMA PROVING GROUND 0.79 ...CALIFORNIA... MT. SAN JACINTO 11.74 ELEVATION 8616FT RAYWOOD FLATS 11.73 ELEVATION 7079FT HEART BAR 9.67 ELEVATION 6690FT RANCHITA 7.38 ELEVATION 4180FT MT LAGUNA 7.11 ELEVATION 6000FT LEWIS RANCH 7.04 LOWER ANGEL PEAK 6.63 WRIGHTWOOD 6.23 ELEVATION 5950FT UPPER TAHQUITZ CREEK 6.22 ELEVATION 5600FT WALKER PASS 6.09 ELEVATION 5572FT AVEK 6.04 PINE MOUNTAIN CLUB 3.75 ...NEVADA... LEE CANYON 8.70 ELEVATION 8618FT LOWER ANGEL PEAK 6.52 YUCCA MOUNTAIN 5.62 ARL SORD AREA 12 MESA 5.56 ARL SORD QUIMA PEAK 4.03 TIMBER MTN 3.76 RAINBOW CANYON 3.40 BERRY CREEK 3.10 ASH MEADOWS 2.00 ...Selected preliminary Peak Wind gusts in miles per hour earlier in the event... ...ARIZONA... YUMA ARPT 69 SAFFORD 4 ENE 60 BENDER SPRINGS 59 MOBILE 2.2 SE 47 GILA BEND 46 ...CALIFORNIA... MAGIC MOUNTAIN TRUCK TRL 87 BIG BLACK MOUNTAIN 84 ESSEX 10 SSE 83 OLD WOMAN MOUNTAIN PALOMAR MTN LOOKOUT 79 PIGSAH PEAK 79 HAUSER MOUNTAIN 78 VALLEY CENTER 7 E 70 CRESTLINE 5 NW 69 SANTA CLARITA 10 ESE 64 ELEVATION 4483FT THOUSAND OAKS 8 SW 57 BONEY MOUNTAIN OCEANSIDE 5 NW 52 CAMP PENDLETON Post-Tropical Cyclone Hilary is forecast to continue its track north into the heart of the Great Basin today, spreading heavy rainfall and high wind gusts throughout the West on Monday. Accordingly, isolated to scattered instances of flash flooding are possible today across much of the West, where a Slight Risk of Excessive Rainfall is in effect. For more information regarding the track of Post-Tropical Cyclone Hilary and associated Excessive Rainfall impacts, refer to the Weather Prediction Center at wpc.ncep.noaa.gov. The next Storm Summary will be issued by the Weather Prediction Center at 800 PM PDT. Please refer to your local National Weather Service office for additional information on this event. Asherman $$