BULLETIN Post-Tropical Cyclone Hilary Advisory Number 22 NWS Weather Prediction Center College Park MD EP092023 200 PM PDT Mon Aug 21 2023 ...ISOLATED FLOODING AND GUSTY WINDS WILL CONTINUE AS THE VESTIGES OF HILARY CROSS THE NORTHERN ROCKIES THIS EVENING... SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...44.6N 115.5W ABOUT 265 MI...425 KM N OF ELKO NEVADA MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 32 MPH...52 KM/H MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES WATCHES AND WARNINGS -------------------- Flood Watches are in effect for... * Parts of Northern California * Northwest Arizona * Much of Nevada * Southwest Utah * Eastern Oregon * Central and Northern Idaho * Far Southeast Washington High Wind Warnings and Wind Advisories are in effect for... * Northern and Central Nevada * Western Utah * Southern Idaho * Southwest Montana DISCUSSION AND OUTLOOK ---------------------- At 200 PM PDT (2100 UTC), the center of Post-Tropical Cyclone Hilary was located near latitude 44.6 North, longitude 115.5 West. The post-tropical cyclone is moving toward the northeast near 32 mph (52 km/h) and this motion is expected to continue into the evening. Maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Continued weakening is forecast during the next 12 hours with the low center becoming ill-defined later tonight. The estimated minimum central pressure is 1005 mb (29.68 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Hilary can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP4 and WMO header WTPZ44 KNHC and on the web at hurricanes.gov/text/MIATCDEP4.shtml. RAINFALL: Rainfall totals of 1 to 2 inches with local maxima of 3 inches will be possible through early Tuesday morning across the central and northern portions of the Intermountain West as well as portions of northern Arizona into central Utah. Isolated flash and urban flooding is possible. A list of rainfall observations compiled by the NOAA Weather Prediction Center for this storm can be found at: available at www.wpc.ncep.noaa.gov/discussions/nfdscc4.html WIND: The broad circulation associated with Hilary is still expected to produce strong, gusty winds in Nevada, western Utah, southern Idaho, and southwest Montana. The strongest gusts will be favored in higher terrain, passes, and canyons, as well as in proximity to thunderstorms. NEXT ADVISORY ------------- This is the last public advisory issued by the Weather Prediction Center on this system. Carbin