Hydrometeorological Discussion
Issued by NWS California-Nevada RFC
Issued by NWS California-Nevada RFC
176 AGUS76 KRSA 191354 HMDRSA Hydrometeorological Discussion National Weather Service / California Nevada RFC / Sacramento CA 700 AM PDT Thu Sep 19 2024 ...CONTINUED COOLER TEMPERATURES WITH PRECIP AND ISOLATED THUNDERSTORMS POSSIBLE THROUGH TOMORROW AS A LOW MOVES THROUGH... ...DRY CONDITIONS RETURN BY THE WEEKEND WITH WARMING TEMPERATURES INTO THE COMING WEEK... .METEOROLOGICAL CONDITIONS (THU AM - WED AM)... An upper low continues to make its way down the CA coastline currently just offshore of the central coast. Radar and satellite imagery along with lightning detection show showers and thunderstorms over Monterey County and eastward into the SJ Valley. Majority of the precip over the past 24 hrs has fallen across the Sierra at about 0.10-0.75" with a few stations reporting totals over an inch. The low will continue its movement along the coast today reaching Point Conception late this afternoon into the evening. The presence of the low along with continued moisture/instability will allow for scattered showers and thunderstorms to persist today, mainly over the central Sierra and to the south. The low will keep heading south overnight along the soCal coast before beginning to move inland by early Friday morning traversing srn CA throughout the day before entering AZ by the early evening. High pressure will build into the eastern Pacific behind the low drying out conditions and beginning to warm temperatures away from srn CA/NV while showers and thunderstorms remain a possibility near the low. Today and tomorrow will see continued below normal temperatures by 5 to 10 deg F or so due to the presence of the upper low. Building high pressure will then gradually bring temperatures up to near normal over the weekend becoming above normal by 10 deg F or so Sunday with those warmer temps spreading across the region early next week. Sunday through the period expect dry conditions and above normal temperatures. Longer term outlooks in the 6-10 and 8-14 day time frames suggest more of the same for the rest of September. 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 AS $$