Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA
Issued by NWS San Francisco Bay Area, CA
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478 FXUS66 KMTR 062101 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 201 PM PDT Mon May 6 2024 ...New SYNOPSIS, SHORT TERM, LONG TERM... .SYNOPSIS... Issued at 124 PM PDT Mon May 6 2024 Seasonal temperatures to start the week with above normal temps expected by Wednesday onward. Warm to end the week with minor Heat Risk. && .SHORT TERM... (This evening through Tuesday) Issued at 124 PM PDT Mon May 6 2024 Another mostly clear day across the area with some high clouds streaming through and some shallow cumulus over terrain in a few of the coastal ranges. Similar to days previous, sufficient mid- level stability will prevent anything interesting from happening with the cumulus. Coming off of a chilly morning today, temperatures will be near seasonal averages the next couple of days, warming gradually. Really not much else to talk about in the short term, as it look like a very pleasant couple of days with little weather risk. && .LONG TERM... (Tuesday night through next Sunday) Issued at 124 PM PDT Mon May 6 2024 By Wednesday, high temps will be above average with afternoon highs nearing 80 for inland areas. This trend will continue into the weekend. Thursday and Friday look to be the warmest days where inland locations could see their first 90 degrees of the year. Most other will see temps in the 80s, while coastal locations will be in the 70s. A bit of uncertainty in regard to the high temp forecast for areas near the coast and bay shoreline, including San Francisco. It appears we`ll have a moderate push of offshore winds for inland areas late Wednesday into Thursday morning. We aren`t expecting these onshore winds to completely erode the marine layer like some strong events we see in the fall, but they could prove to make Thursday`s high temp forecast difficult, especially for SF and the east and north bay shorelines. Current forecast for these areas Thursday is the upper 70s to lower 80s, but these temps may need to be nudged upwards in the event we expect the offshore component to last longer into Thursday. In regard to the offshore winds, it appears to be a fairly short event (<1 day), and any drying that occurs is not expected to reach critical levels. Inland areas will see very limited RH recovery going into Thursday, but should bounce back by Friday morning and into the weekend as winds return to onshore. Guidance brings temps down slightly into the weekend, but still above normal. All in all should be a very nice second half of the week for everyone. That being said, folks should still exercise caution when enjoying time outdoors as this swing from below normal to above normal temperatures can catch people off guard. Plan to pack some extra water and sun protection if you`re planning to spend time outdoors. And the most important preparation if you`re going to the coast or relaxing poolside...SUNSCREEN!!! && .AVIATION... (18Z TAFS) Issued at 1037 AM PDT Mon May 6 2024 VFR at all stations except MRY and, potentially, SNS where stratus is set to return overnight. HREF guidance shows stratus extending inland on the Central Coast and into portions of the Bay Area. Guidance was split on how far stratus would be transported inland with some MVFR potential at SJC, SFO, and OAK overnight depending on inland progression. Moderate to at times gusty W to NW winds through this afternoon with winds gradually becoming more northerly over the TAF period. Vicinity of SFO...VFR through the TAF period. Guidance was split on MVFR CIG development but a few indicated a short period of MVFR conditions between 05-10Z. Confidence remains low so did not go full out in the TAFs yet. Any CIGs that do develop look to scatter out after 10Z with VFR expected afterwards. Moderate W to NW winds will become more northerly throughout the TAF period. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...VFR transitioning to MVFR. Moderate confidence that stratus will move inland along the Central Coast with MVFR CIGs expected at MRY and borderline MVFR/VFR CIGs at SNS. Guidance was split on if MVFR CIGs would develop at SNS but if MVFR CIGs do develop 09-15Z will be the most likely timeframe. Moderate W winds this afternoon will weaken overnight to light to moderate. && .MARINE... (Today through Saturday) Issued at 1037 AM PDT Mon May 6 2024 Fair weather and moderate west to northwesterly winds will prevail today. Northerly winds will strengthen increase overnight as surface high pressure builds and moves into the Pacific Northwest. Near gale force sustained winds and gale force gusts increase in likelihood and area coverage Tuesday and Wednesday. Guidance indicates the strongest winds will be across the northern coastal outer waters with high end gale force gusts currently expected. Gale watches have been issued along the Big Sur coast and outer coastal waters for Tuesday night into Wednesday night. During this same time frame, significant wave heights will begin to build to heights of up to 15 feet. As such, conditions will be extremely hazardous for all but the largest vessels Tuesday and Wednesday and extreme caution should be exercised during this time. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay- Pigeon Pt to Pt Pinos 0-10 nm. Small Craft Advisory from 9 AM to 9 PM PDT Tuesday for Mry Bay. Small Craft Advisory from 3 AM Tuesday to 3 AM PDT Wednesday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory from 9 AM Tuesday to 3 AM PDT Wednesday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory until 3 AM PDT Tuesday for Pt Pinos to Pt Piedras Blancas 0-10 nm. Gale Watch from late tonight through late Tuesday night for Pt Pinos to Pt Piedras Blancas 0-10 nm. Small Craft Advisory from 3 AM to 3 PM PDT Tuesday for Pt Arena to Pt Reyes 10-60 NM. Gale Watch from Tuesday afternoon through late Tuesday night for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Behringer LONG TERM....Behringer AVIATION...Kennedy MARINE...Kennedy Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea