249 FNUS86 KMTR 192121 FWLMTR ECCDA Discussions National Weather Service SAN FRANCISCO BAY AREA 221 PM PDT Tue May 19 2026 ##################################################################### ## ## ## Discussions from the latest FWF below ## ## ## ##################################################################### ...Discussion from SFOFWFMTR... ...ELEVATED FIRE WEATHER CONCERNS ACROSS THE INTERIOR BAY AREA AND CENTRAL COAST THROUGH THURSDAY DUE TO CRITICALLY LOW HUMIDITIES... Light offshore winds continue across the higher terrain and portions of the interior through midweek. Critically dry conditions continue across the interior and higher elevations through midweek with humidity values in the 10s to 20s. Overnight recoveries remain poor to fair through Thursday night. A shallow marine layer is expected to develop late week into the weekend which will bring improved daytime and overnight humidity values. Fire weather concerns will remain elevated through late week but will ease as humidity conditions improve. ...Discussion from SFOFWFEKA... A gradual warming trend is expected through Thursday. Typical afternoon breezes are expected each day with a few gusts approacching 25 mph closer to the coast. High pressure will weaken through the weekend, allowing for cooler daytime highs. ##################################################################### ## ## ## Complete a discussion for each ECCDA segment below ## ## When done click transmit, product sent as KMTRFWLMTR ## ## ## ##################################################################### ECC010-200930- St Helena ECC Dispatch- DISCUSSION FOR Marin and Sonoma and Napa Counties 221 PM PDT Tue May 19 2026 Light offshore winds continue across the higher terrain and portions of the interior through midweek. Critically dry conditions continue across the interior and higher elevations through midweek with humidity values in the 10s to 20s. Overnight recoveries remain poor to fair through Thursday night. A shallow marine layer is expected to develop late week into the weekend which will bring improved daytime and overnight humidity values. Fire weather concerns will remain elevated through late week but will ease as humidity conditions improve. $$ ECC014-200930- Morgan Hill ECC Dispatch- DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties 221 PM PDT Tue May 19 2026 Light offshore winds continue across the higher terrain and portions of the interior through midweek. Critically dry conditions continue across the interior and higher elevations through midweek with humidity values in the 10s to 20s. Overnight recoveries remain poor to fair through Thursday night. A shallow marine layer is expected to develop late week into the weekend which will bring improved daytime and overnight humidity values. Fire weather concerns will remain elevated through late week but will ease as humidity conditions improve. $$ ECC013-200930- Felton ECC Dispatch- DISCUSSION FOR Santa Cruz and San Mateo Counties 221 PM PDT Tue May 19 2026 Light offshore winds continue across the higher terrain and portions of the interior through midweek. Critically dry conditions continue across the interior and higher elevations through midweek with humidity values in the 10s to 20s. Overnight recoveries remain poor to fair through Thursday night. A shallow marine layer is expected to develop late week into the weekend which will bring improved daytime and overnight humidity values. Fire weather concerns will remain elevated through late week but will ease as humidity conditions improve. $$ ECC018-200930- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 221 PM PDT Tue May 19 2026 Light offshore winds continue across the higher terrain and portions of the interior through midweek. Critically dry conditions continue across the interior and higher elevations through midweek with humidity values in the 10s to 20s. Overnight recoveries remain poor to fair through Thursday night. A shallow marine layer is expected to develop late week into the weekend which will bring improved daytime and overnight humidity values. Fire weather concerns will remain elevated through late week but will ease as humidity conditions improve. $$  689 FNUS86 KSTO 192128 FWLSTO ECCDA DISCUSSIONS FOR CALIFORNIA NATIONAL WEATHER SERVICE SACRAMENTO CA 228 PM PDT TUE MAY 19 2026 ECC005-201530- SHASTA-TRINITY NATIONAL FOREST- DISCUSSION FOR REDDING ECC DISPATCH 228 PM PDT TUE MAY 19 2026 DRY WEATHER AND LIGHTER WINDS WILL PERSIST FOR THE REST OF THE WEEK. HUMIDITY LEVELS WILL BE LOW, BUT WILL TREND A BIT HIGHER THROUGH THE WEEK, ESPECIALLY WITH INCREASED ONSHORE FLOW BY THE WEEKEND. TEMPERATURES WILL BE ABOVE NORMAL AND TREND WARMER, PEAKING ON THURSDAY, THEN GRADUALLY DECREASE WITH SLIGHT COOLING. $$ ECC007-201530- MENDOCINO NATIONAL FOREST, SOUTHERN SACRAMENTO VALLEY, AND DELTA- DISCUSSION FOR WILLOWS ECC DISPATCH 228 PM PDT TUE MAY 19 2026 DRY WEATHER AND LIGHTER WINDS WILL PERSIST FOR THE REST OF THE WEEK. HUMIDITY LEVELS WILL BE LOW, BUT WILL TREND A BIT HIGHER THROUGH THE WEEK, ESPECIALLY WITH INCREASED ONSHORE FLOW BY THE WEEKEND. TEMPERATURES WILL BE ABOVE NORMAL AND TREND WARMER, PEAKING ON THURSDAY, THEN GRADUALLY DECREASE WITH SLIGHT COOLING. $$ ECC008-201530- RED BLUFF AND OROVILLE- DISCUSSION FOR RED BLUFF AND OROVILLE ECC DISPATCH 228 PM PDT TUE MAY 19 2026 DRY WEATHER AND LIGHTER WINDS WILL PERSIST FOR THE REST OF THE WEEK. HUMIDITY LEVELS WILL BE LOW, BUT WILL TREND A BIT HIGHER THROUGH THE WEEK, ESPECIALLY WITH INCREASED ONSHORE FLOW BY THE WEEKEND. TEMPERATURES WILL BE ABOVE NORMAL AND TREND WARMER, PEAKING ON THURSDAY, THEN GRADUALLY DECREASE WITH SLIGHT COOLING. $$ ECC011-201530- TAHOE NATIONAL FOREST- DISCUSSION FOR GRASS VALLEY ECC DISPATCH 228 PM PDT TUE MAY 19 2026 DRY WEATHER AND LIGHTER WINDS WILL PERSIST FOR THE REST OF THE WEEK. HUMIDITY LEVELS WILL BE LOW, BUT WILL TREND A BIT HIGHER THROUGH THE WEEK, ESPECIALLY WITH INCREASED ONSHORE FLOW BY THE WEEKEND. TEMPERATURES WILL BE ABOVE NORMAL AND TREND WARMER, PEAKING ON THURSDAY, THEN GRADUALLY DECREASE WITH SLIGHT COOLING. $$ ECC015-201530- STANISLAUS NATIONAL FOREST- DISCUSSION FOR SAN ANDREAS ECC DISPATCH 228 PM PDT TUE MAY 19 2026 DRY WEATHER AND LIGHTER WINDS WILL PERSIST FOR THE REST OF THE WEEK. HUMIDITY LEVELS WILL BE LOW, BUT WILL TREND A BIT HIGHER THROUGH THE WEEK, ESPECIALLY WITH INCREASED ONSHORE FLOW BY THE WEEKEND. TEMPERATURES WILL BE ABOVE NORMAL AND TREND WARMER, PEAKING ON THURSDAY, THEN GRADUALLY DECREASE WITH SLIGHT COOLING. $$  272 FNUS86 KMFR 192135 FWLMFR ECCDA Discussions for Yreka and Modoc California Dispatch Areas NATIONAL WEATHER SERVICE MEDFORD OR 235 PM PDT Tue May 19 2026 ECC002-201545- West Yreka- Discussion for Western Klamath 235 PM PDT Tue May 19 2026 A dry air mass will be in place the rest of this week and into this weekend. Breezes will be diurnal in nature and peak each afternoon/evening. Meanwhile, an overall warming trend is expected with high temperatures about 10-15F above normal Thursday to Sunday. Some cooling is possible late this weekend, but more likely on Memorial Day, when there is a chance of showers. $$ ECC102-201545- East Yreka- Discussion for Eastern Klamath 235 PM PDT Tue May 19 2026 A dry air mass will be in place the rest of this week and into this weekend. Breezes will be diurnal in nature and peak each afternoon/evening. Meanwhile, an overall warming trend is expected with high temperatures about 10-15F above normal Thursday to Sunday. Some cooling is possible late this weekend, but more likely on Memorial Day, when there is a chance of showers. $$ ECC003-201545- Alturas- Discussion for Modoc 235 PM PDT Tue May 19 2026 A dry air mass will be in place the rest of this week and into this weekend. Breezes will be diurnal in nature and peak each afternoon/evening. Meanwhile, an overall warming trend is expected with high temperatures about 10-15F above normal Thursday to Sunday. Some cooling is possible late this weekend, but more likely on Memorial Day, when there is a chance of showers. $$