Alert archive / California / Excessive Heat Warnings in 2017
Excessive Heat Warning 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this excessive heat warning at Aug 25, 2017, 8:03 AM PDT for 7 counties in California. It took effect at Aug 26, 2017, 11:00 AM PDT. It was in force for 63 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 25, 2017, 8:03 AM PDT (15:03 UTC)
- In effect from
- Aug 26, 2017, 11:00 AM PDT
- Expired
- Aug 29, 2017, 2:27 AM PDT
- In force
- 63 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Alameda County, CA, Contra Costa County, CA, Monterey County, CA, San Benito County, CA, San Mateo County, CA, Santa Clara County, CA, Santa Cruz County, CA
The radar
The San Francisco radar (KMUX), 12 km from the middle of the area, began a volume at 15:02 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 3.1 hours before the alert went out and 74 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1602 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
088 WWUS76 KMTR 251503 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 803 AM PDT Fri Aug 25 2017 ...MUCH WARMER WEATHER TO START THIS WEEKEND... CAZ511-516>518-260500- /O.NEW.KMTR.EH.W.0002.170826T1800Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 803 AM PDT Fri Aug 25 2017 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM SATURDAY TO 9 PM PDT MONDAY... The National Weather Service in San Francisco has issued an Excessive Heat Warning, which is in effect from 11 AM Saturday to 9 PM PDT Monday. * TEMPERATURES: Highs of 95 to 108 can be expected Saturday through at least Tuesday. Lows will mostly be in the 60s and 70s. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-512-260500- /O.NEW.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ North Bay Mountains-Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Scotts Valley, Boulder Creek, and Day Valley 803 AM PDT Fri Aug 25 2017 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... The National Weather Service in San Francisco has issued an Excessive Heat Warning, which is in effect from 11 AM Sunday to 9 PM PDT Monday. * TEMPERATURES: Highs of 95 to 105 can be expected Sunday and Monday. Lows will mostly be in the 60s. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-510-513-528-260500- /O.NEW.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ North Bay Interior Valleys-East Bay Interior Valleys- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, San Jose, and Salinas 803 AM PDT Fri Aug 25 2017 ...HEAT ADVISORY IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... The National Weather Service in San Francisco has issued a Heat Advisory, which is in effect from 11 AM Sunday to 9 PM PDT Monday. * TEMPERATURES: Highs of 92 to 102 can be expected. Lows will mostly be in the 60s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
10 follow-up statements
781 WWUS76 KMTR 260357 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 857 PM PDT Fri Aug 25 2017 ...VERY WARM TO HOT TEMPERATURES FORECAST TO DEVELOP INLAND OVER THE WEEKEND AND CONTINUE INTO EARLY NEXT WEEK... CAZ511-516>518-261800- /O.CON.KMTR.EH.W.0002.170826T1800Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 857 PM PDT Fri Aug 25 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM SATURDAY TO 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect from 11 AM Saturday to 9 PM PDT Monday. * TEMPERATURES: Highs of 95 to 108 can be expected Saturday through at least Monday. Lows will mostly be in the 60s and 70s, with some lower 80s likely in the hills by Sunday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-512-261800- /O.CON.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ North Bay Mountains-Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Scotts Valley, Boulder Creek, and Day Valley 857 PM PDT Fri Aug 25 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect from 11 AM Sunday to 9 PM PDT Monday. * TEMPERATURES: Highs of 95 to 105 can be expected Sunday and Monday. Lows will mostly be in the 60s in the valleys and 70s in the hills. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-510-513-528-261800- /O.CON.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ North Bay Interior Valleys-East Bay Interior Valleys- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, San Jose, and Salinas 857 PM PDT Fri Aug 25 2017 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... A Heat Advisory remains in effect from 11 AM Sunday to 9 PM PDT Monday. * TEMPERATURES: Highs of 92 to 102 can be expected. Lows will mostly be in the 60s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
801 WWUS76 KMTR 261053 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 353 AM PDT Sat Aug 26 2017 ...VERY WARM TO HOT TEMPERATURES FORECAST TO DEVELOP INLAND OVER THE WEEKEND AND CONTINUE INTO EARLY NEXT WEEK... CAZ511-516>518-262300- /O.CON.KMTR.EH.W.0002.170826T1800Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 353 AM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9 PM PDT MONDAY... an Excessive Heat Warning remains in effect from 11 AM this morning to 9 PM PDT Monday. * TEMPERATURES: Highs of 95 to 108 can be expected Saturday through at least Monday. Lows will mostly be in the 60s and 70s, with some lower 80s likely in the hills by Sunday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-512-262300- /O.CON.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ North Bay Mountains-Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Scotts Valley, Boulder Creek, and Day Valley 353 AM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... an Excessive Heat Warning remains in effect from 11 AM Sunday to 9 PM PDT Monday. * TEMPERATURES: Highs of 95 to 105 can be expected Sunday and Monday. Lows will mostly be in the 60s in the valleys and 70s in the hills. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-510-513-528-262300- /O.CON.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ North Bay Interior Valleys-East Bay Interior Valleys- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, San Jose, and Salinas 353 AM PDT Sat Aug 26 2017 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... a Heat Advisory remains in effect from 11 AM Sunday to 9 PM PDT Monday. * TEMPERATURES: Highs of 92 to 102 can be expected. Lows will mostly be in the 60s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
516 WWUS76 KMTR 262039 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 139 PM PDT Sat Aug 26 2017 ...VERY WARM TO HOT TEMPERATURES TO PERSIST INLAND OVER THE WEEKEND THROUGH EARLY NEXT WEEK... CAZ511-516>518-271200- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 139 PM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect until 9 PM PDT Monday. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest, the East Bay Hills and Diablo Range, the mountains of San Benito County and interior Monterey County including Pinnacles National Park and southern Salinas Valley. * TEMPERATURES...Highs of 95 to 108 can be expected Saturday through at least Monday. Lows will mostly be in the 60s and 70s, with some lower 80s likely in the hills by Sunday night. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-512-271200- /O.CON.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ North Bay Mountains-Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Scotts Valley, Boulder Creek, and Day Valley 139 PM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect from 11 AM Sunday to 9 PM PDT Monday. * LOCATIONS...North Bay Mountains (mainly around Lake Berryessa) and the Santa Cruz Mountains. * TEMPERATURES: Highs of 95 to 105 can be expected Sunday and Monday. Lows will mostly be in the 60s in the valleys and 70s in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-510-513-528-271200- /O.CON.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ North Bay Interior Valleys-East Bay Interior Valleys- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, San Jose, and Salinas 139 PM PDT Sat Aug 26 2017 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... A Heat Advisory remains in effect from 11 AM Sunday to 9 PM PDT Monday. * LOCATIONS...North Bay Interior Valleys, East Bay Interior Valleys, Santa Clara Valley, Northern Salinas Valley, Hollister Valley and Carmel Valley. * TEMPERATURES: Highs of 92 to 102 can be expected. Lows will mostly be in the 60s. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
766 WWUS76 KMTR 270005 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 505 PM PDT Sat Aug 26 2017 ...HOT TEMPERATURES TO PERSIST INLAND THROUGH EARLY NEXT WEEK... CAZ510-271300- /O.UPG.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ /O.EXA.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ East Bay Interior Valleys- Including the cities of Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, and San Ramon 505 PM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... The National Weather Service San Francisco Bay Area has issued an Excessive Heat Warning, which is in effect from 11 AM Sunday to 9 PM PDT Monday. The Excessive Heat Warning is an upgrade from a previously issued Heat Advisory. * LOCATIONS...East Bay Interior Valleys. * TEMPERATURES: Highs of 98 to 108 can be expected Sunday and Monday. Lows will mostly be in the 60s. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ511-516>518-271300- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 505 PM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect until 9 PM PDT Monday. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest, the East Bay Hills and Diablo Range, the mountains of San Benito County and interior Monterey County including Pinnacles National Park, and the southern Salinas Valley. * TEMPERATURES...Highs of 98 to 112 can be expected Sunday and Monday. Lows will mostly be in the 60s and 70s, with some lower 80s likely in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-512-271300- /O.CON.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ North Bay Mountains-Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Scotts Valley, Boulder Creek, and Day Valley 505 PM PDT Sat Aug 26 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect from 11 AM Sunday to 9 PM PDT Monday. * LOCATIONS...North Bay Mountains (including Lake Berryessa) and the Santa Cruz Mountains. * TEMPERATURES: Highs of 95 to 105 can be expected Sunday and Monday. Lows will mostly be in the 60s in the valleys and 70s and lower 80s in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ508-271300- /O.EXA.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ San Francisco Bay Shoreline- Including the cities of Oakland, Fremont, Hayward, Daly City, and Berkeley 505 PM PDT Sat Aug 26 2017 ...HEAT ADVISORY IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... The National Weather Service San Francisco Bay Area has issued a Heat Advisory, which is in effect from 11 AM Sunday to 9 PM PDT Monday. * LOCATIONS...San Francisco Bay Shoreline. * TEMPERATURES: Highs of 85 to 95 can be expected. Lows will mostly be in the upper 50s to mid 60s. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-513-528-271300- /O.CON.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ North Bay Interior Valleys-Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, San Jose, and Salinas 505 PM PDT Sat Aug 26 2017 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM SUNDAY TO 9 PM PDT MONDAY... A Heat Advisory remains in effect from 11 AM Sunday to 9 PM PDT Monday. * LOCATIONS...North Bay Interior Valleys, Santa Clara Valley, Northern Salinas Valley, Hollister Valley and Carmel Valley. * TEMPERATURES: Highs of 95 to 105 can be expected Sunday and Monday. Lows will mostly be in the upper 50s and 60s. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
485 WWUS76 KMTR 271229 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 529 AM PDT Sun Aug 27 2017 ...HOT TEMPERATURES TO PERSIST INLAND THROUGH MONDAY... CAZ511-516>518-280400- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 529 AM PDT Sun Aug 27 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect until 9 PM PDT Monday. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest, the East Bay Hills and Diablo Range, the mountains of San Benito County and interior Monterey County including Pinnacles National Park, and the southern Salinas Valley. * TEMPERATURES...Highs of 98 to 112 can be expected Sunday and Monday. Lows will mostly be in the 60s and 70s, with some lower 80s likely in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-510-512-280400- /O.CON.KMTR.EH.W.0002.170827T1800Z-170829T0400Z/ North Bay Mountains-East Bay Interior Valleys- Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, Scotts Valley, Boulder Creek, and Day Valley 529 AM PDT Sun Aug 27 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9 PM PDT MONDAY... An Excessive Heat Warning remains in effect from 11 AM this morning to 9 PM PDT Monday. * LOCATIONS...East Bay Interior Valleys, North Bay Mountains (including Lake Berryessa), and the Santa Cruz Mountains. * TEMPERATURES: Highs of 95 to 108 can be expected Sunday and Monday. Lows will mostly be in the 60s in the valleys and 70s and lower 80s in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-508-513-528-280400- /O.CON.KMTR.HT.Y.0005.170827T1800Z-170829T0400Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Oakland, Fremont, Hayward, Daly City, Berkeley, San Jose, and Salinas 529 AM PDT Sun Aug 27 2017 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9 PM PDT MONDAY... A Heat Advisory remains in effect from 11 AM this morning to 9 PM PDT Monday. * LOCATIONS...San Francisco Bay Shoreline, North Bay Interior Valleys, Santa Clara Valley, Northern Salinas Valley, Hollister Valley, and Carmel Valley. * TEMPERATURES: Highs of 85 to 95 can be expected on Sunday and Monday for the San Francisco Bay Shoreline. Elsewhere highs of 95 to 105 are forecast for Sunday and Monday. Lows will mostly be in the upper 50s to mid 60s. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
270 WWUS76 KMTR 272048 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 148 PM PDT Sun Aug 27 2017 ...HOT TEMPERATURES TO PERSIST INLAND THROUGH MONDAY... CAZ511-516>518-281200- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 148 PM PDT Sun Aug 27 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT MONDAY... an Excessive Heat Warning remains in effect until 9 PM PDT Monday. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest, the East Bay Hills and Diablo Range, the mountains of San Benito County and interior Monterey County including Pinnacles National Park, and the southern Salinas Valley. * TEMPERATURES...Highs of 98 to 112 can be expected Sunday and Monday. Lows will mostly be in the 60s and 70s, with some lower 80s likely in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-510-512-281200- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ North Bay Mountains-East Bay Interior Valleys- Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, Scotts Valley, Boulder Creek, and Day Valley 148 PM PDT Sun Aug 27 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT MONDAY... an Excessive Heat Warning remains in effect until 9 PM PDT Monday. * LOCATIONS...East Bay Interior Valleys, North Bay Mountains (including Lake Berryessa), and the Santa Cruz Mountains. * TEMPERATURES: Highs of 95 to 108 can be expected Sunday and Monday. Lows will mostly be in the 60s in the valleys and 70s and lower 80s in the hills. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-508-513-528-281200- /O.CON.KMTR.HT.Y.0005.000000T0000Z-170829T0400Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Oakland, Fremont, Hayward, Daly City, Berkeley, San Jose, and Salinas 148 PM PDT Sun Aug 27 2017 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT MONDAY... a Heat Advisory remains in effect until 9 PM PDT Monday. * LOCATIONS...San Francisco Bay Shoreline, North Bay Interior Valleys, Santa Clara Valley, Northern Salinas Valley, Hollister Valley, and Carmel Valley. * TEMPERATURES: Highs of 85 to 95 can be expected on Sunday and Monday for the San Francisco Bay Shoreline. Elsewhere highs of 95 to 105 are forecast for Sunday and Monday. Lows will mostly be in the upper 50s to mid 60s. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
866 WWUS76 KMTR 281108 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 408 AM PDT Mon Aug 28 2017 ...HOT TEMPERATURES TO PERSIST INLAND TODAY... CAZ511-516>518-290400- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the cities of Blackhawk, Greenfield, and King City 408 AM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... an Excessive Heat Warning remains in effect until 9 PM PDT this evening. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest, the East Bay Hills and Diablo Range, the mountains of San Benito County and interior Monterey County including Pinnacles National Park, and the southern Salinas Valley. * TEMPERATURES...Highs of 98 to 112 can be expected today. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ507-510-512-290400- /O.CON.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ North Bay Mountains-East Bay Interior Valleys- Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, Scotts Valley, Boulder Creek, and Day Valley 408 AM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... an Excessive Heat Warning remains in effect until 9 PM PDT this evening. * LOCATIONS...East Bay Interior Valleys, North Bay Mountains (including Lake Berryessa), and the Santa Cruz Mountains. * TEMPERATURES: Highs of 95 to 108 can be expected today. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$ CAZ506-508-513-528-290400- /O.CON.KMTR.HT.Y.0005.000000T0000Z-170829T0400Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Oakland, Fremont, Hayward, Daly City, Berkeley, San Jose, and Salinas 408 AM PDT Mon Aug 28 2017 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... a Heat Advisory remains in effect until 9 PM PDT this evening. * LOCATIONS...San Francisco Bay Shoreline, North Bay Interior Valleys, Santa Clara Valley, Northern Salinas Valley, Hollister Valley, and Carmel Valley. * TEMPERATURES: Highs of 85 to 95 can be expected today for the San Francisco Bay Shoreline. Elsewhere highs of 95 to 105 are forecast today. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Heat Advisory means that a period of hot temperatures is expected. Hot temperatures will create a situation in which heat illnesses are possible. Drink plenty of fluids...stay in an air- conditioned room...stay out of the sun...and check up on relatives and neighbors. && $$
250 WWUS76 KMTR 290346 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 846 PM PDT Mon Aug 28 2017 ...HOT TEMPERATURES TO PERSIST INLAND TODAY... CAZ511-518-290500- /O.EXP.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the city of Blackhawk 846 PM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING... The Excessive Heat Warning will expire at 9 PM PDT this evening. $$ CAZ507-510-512-290500- /O.EXP.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ North Bay Mountains-East Bay Interior Valleys- Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, Scotts Valley, Boulder Creek, and Day Valley 846 PM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING... The Excessive Heat Warning will expire at 9 PM PDT this evening. $$ CAZ506-508-513-528-290500- /O.EXP.KMTR.HT.Y.0005.000000T0000Z-170829T0400Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Oakland, Fremont, Hayward, Daly City, Berkeley, San Jose, and Salinas 846 PM PDT Mon Aug 28 2017 ...HEAT ADVISORY WILL EXPIRE AT 9 PM PDT THIS EVENING... The Heat Advisory will expire at 9 PM PDT this evening. $$ CAZ516-517-291200- /O.EXT.KMTR.EH.W.0002.000000T0000Z-170830T0400Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Including the cities of Greenfield and King City 846 PM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 9 PM PDT TUESDAY... The Excessive Heat Warning is now in effect until 9 PM PDT Tuesday. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest and the southern Salinas Valley. * TEMPERATURES...Highs of 95 to 110 can be expected today. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...never leave kids or pets in a vehicle...and check up on relatives and neighbors. && $$
485 WWUS76 KMTR 290349 CCA NPWMTR URGENT - WEATHER MESSAGE...CORRECTED National Weather Service San Francisco Bay Area 849 PM PDT Mon Aug 28 2017 ...HOT TEMPERATURES TO PERSIST INLAND THROUGH TUESDAY... CAZ511-518-290500- /O.EXP.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ East Bay Hills and the Diablo Range- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Including the city of Blackhawk 849 PM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING... The Excessive Heat Warning will expire at 9 PM PDT this evening. $$ CAZ507-510-512-290500- /O.EXP.KMTR.EH.W.0002.000000T0000Z-170829T0400Z/ North Bay Mountains-East Bay Interior Valleys- Santa Cruz Mountains- Including the cities of Angwin, Lagunitas-Forest Knolls, Woodacre, Concord, Antioch, Livermore, Walnut Creek, Pleasanton, Pittsburg, San Ramon, Scotts Valley, Boulder Creek, and Day Valley 849 PM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING... The Excessive Heat Warning will expire at 9 PM PDT this evening. $$ CAZ506-508-513-528-290500- /O.EXP.KMTR.HT.Y.0005.000000T0000Z-170829T0400Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- Santa Clara Valley Including San Jose- Northern Salinas Valley/Hollister Valley and Carmel Valley- Including the cities of Santa Rosa, South Santa Rosa, Napa, San Rafael, Petaluma, Novato, Rohnert Park, Oakland, Fremont, Hayward, Daly City, Berkeley, San Jose, and Salinas 849 PM PDT Mon Aug 28 2017 ...HEAT ADVISORY WILL EXPIRE AT 9 PM PDT THIS EVENING... The Heat Advisory will expire at 9 PM PDT this evening. $$ CAZ516-517-291200- /O.COR.KMTR.EH.W.0002.000000T0000Z-170830T0400Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Including the cities of Greenfield and King City 849 PM PDT Mon Aug 28 2017 ...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 9 PM PDT TUESDAY... The Excessive Heat Warning is now in effect until 9 PM PDT Tuesday. * LOCATIONS...The Santa Lucia Mountains and Los Padres National Forest and the southern Salinas Valley. * TEMPERATURES...Highs of 95 to 110 can be expected once again Tuesday. * IMPACTS...Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations. Pets and livestock may also require extra care through the warm weather. Hot, dry weather will increase risk of human sourced wildfire. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a prolonged period of dangerously hot temperatures will occur. Hot temperatures will create a dangerous situation in which heat illnesses are likely. Drink plenty of fluids...stay in an air-conditioned room...stay out of the sun...never leave kids or pets in a vehicle...and check up on relatives and neighbors. && $$
926 WWUS76 KMTR 290927 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 227 AM PDT Tue Aug 29 2017 CAZ516-517-291030- /O.CAN.KMTR.EH.W.0002.000000T0000Z-170830T0400Z/ Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Including the cities of Greenfield and King City 227 AM PDT Tue Aug 29 2017 ...EXCESSIVE HEAT WARNING IS CANCELLED... Northwesterly winds with cooler marine air have reached into the southern Salinas Valley overnight. Daytime highs today will still be warm to hot, especially above 2,000 feet elevation, but typical of highs for late summer. $$
What forecasters said that day
The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this excessive heat warning went out at Aug 25, 4:54 AM PDT, 3 hours 9 minutes earlier.
Area forecast discussion, Aug 25, 4:54 AM PDT, 3 hours 9 minutes before
Area Forecast Discussion
National Weather Service San Francisco Bay Area
454 AM PDT Fri Aug 25 2017
.SYNOPSIS...High pressure building in over the region will result
mainly clear skies and a gradual warming trend starting today.
Significantly warmer temperatures are expected over the weekend
with temperatures expected to peak on Sunday. Very warm to hot
daytime temperatures will continue into early next week especially
over inland areas.
&&
.DISCUSSION...as of 3:20 AM PDT Friday...Skies remain mainly
clear this morning while a moderate northerly gradient remains in
place. A few patches of low clouds persist along the San Mateo
coast as well as over the Monterey bay and down the Salinas Valley
under a shallow 1000 ft marine layer. The shallow marine layer
will result in an early burn off of stratus this morning leading
to mostly clear skies across the region by noon.
A weak upper level low located over the southern portion of the
forecast area will continue to weaken as a ridge of high pressure
currently centered over the four corners expands westward over
California. Models remain is fairly good agreement that the ridge
will continue to build through today resulting in a few degrees of
warming mainly over inland areas while coastal areas see little
to no change. Seasonal temperatures in the 60s along the coast,
70s around the bay and 80s a bit farther inland are expected for
one more day today. Warmest inland areas will likely see
temperatures in the 90s to around 100s over the warmest southern
interior valleys.
Models indicate a significant rise in 850 mb temperatures and
500 mb heights Saturday and Sunday with values increasing to
around 25 C and 593 DM, respectively by Sunday. This will kick off
a significant warming trend that will translate to daytime highs
in the 70s along the coast, upper 70s and 80s around the bay,
widespread 90s inland to 110 degrees in the warmest southern
interior valleys. Temperatures are anticipated to peak on Sunday
however very warm to hot temperatures will continue into early
next week and the ridge remains relatively stationary over the
western U.S. Little change is forecast is the temperatures and
heights aloft as well. This prolonged stretch of very warm to hot
temperatures will likely lead to heat related issues for those
sensitive to the heat such as the young and the elderly. Please
use caution and never leave children or pets unattended in
vehicles and check on elderly neighbors that may need assistance.
Drink plenty of water and stay hydrated.
Medium and long range models show little change in the overall
weather pattern with a ridge of high pressure remaining the
dominant feature over the region. Anticipate unseasonably warm
temperatures through the foreseeable future with night and
morning low clouds expected to be confined mainly to the coast and
only moderate inland intrusion overnight under a moderately
compressed marine layer.
&&
.AVIATION...As of 4:45 AM PDT Friday for 12Z Friday TAFs. A very
tricky cig forecast over the next 4-6 hours. Dry air entrained
from the north late last night and has greatly affected the marine
layer this morning. Both Bodega Bay and Fort Ord Profilers show a
very shallow, less than 1000 ft, marine layer in place. Current
infrared satellite shows stratus trying to rebound before sunrise,
but the extent of the rebound is not known at the moment. Bay
Area terminals have been flirting with VFR/MVFR cigs and vis over
the past few hours, and will likely be the case through mid
morning. Monterey Bay terminals will likely stay in IFR/LIFR cigs
through at least 17z, but tafs will have to be monitored and
amended over the next few hours due to high uncertainty. As a high
pressure ridge builds into the area, the marine layer is expected
to compress below 1000 ft, with a possibly of completely mixing
out, by tonight. Therefore, there is very low confidence with
tonight's cig forecast. Light to moderate onshore winds this
afternoon.
Vicinity of KSFO...Borderline VFR/MVFR conditions through 16-17z.
Included a tempo group for both KSFO and KOAK for MVFR cigs
through 16z. Low confidence with low clouds returning tonight, as
marine layer is expected to compress. Expect breezy west winds
this afternoon with sustained winds between 15 and 20 kt likely.
SFO Bridge Approach...Approach may see FEW/SCT low clouds, with
the possibility of BKN cigs through about 17z.
Monterey Bay Terminals...IFR/LIFR conditions are expected through
about 17z, with low confidence on exact clearing time. Light to
moderate westerly winds 10-12 kt this afternoon. Cig development
tonight will highly depend on how shallow the marine layer gets.
Low confidence on coverage and timing.
&&
.MARINE...as of 2:32 AM PDT Friday...Moderate to locally strong
north winds will continue over the coastal waters through Saturday
morning, with the potential for gusts to exceed gale-force at
times. Steep fresh swell will accompany the strongest winds,
especially over the outer waters north of Point Reyes. Pressure
gradient eases by Saturday afternoon and winds are forecast to
decrease through the weekend.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
.Tday...SCA...Pigeon Pt to Pt Pinos 0-10 nm from 9 AM
SCA...Pt Arena to Pt Reyes 0-10 nm
SCA...Pt Arena to Pigeon Pt 10-60 nm
SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm
SCA...Pt Reyes to Pigeon Pt 0-10 nm until 9 AM
SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm until 9 AM
&&
PUBLIC FORECAST: CW
AVIATION: BAM
MARINE: BAM
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www.youtube.com/nwsbayareaHazardous weather outlook, Aug 24, 1:12 PM PDT, 18 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK National Weather Service SAN FRANCISCO CA 112 PM PDT Thu Aug 24 2017 CAZ006-505>513-516>518-528>530-252015- San Francisco- Coastal North Bay Including Point Reyes National Seashore- North Bay Interior Valleys-North Bay Mountains- San Francisco Bay Shoreline-San Francisco Peninsula Coast- East Bay Interior Valleys-East Bay Hills and the Diablo Range- Santa Cruz Mountains-Santa Clara Valley Including San Jose- Southern Salinas Valley/Arroyo Seco and Lake San Antonio- Santa Lucia Mountains and Los Padres National Forest- Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park- Northern Salinas Valley/Hollister Valley and Carmel Valley- Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast- 112 PM PDT Thu Aug 24 2017 This hazardous weather outlook is for the San Francisco Bay Area. .DAY ONE...This Afternoon and Tonight Seasonable temperatures can be expected. .DAYS TWO THROUGH SEVEN...Friday through Wednesday A building ridge of high pressure will lead to a substantial warming trend especially for locations away from the coast. Widespread upper 80s to lower 100s are likely starting on Sunday for inland areas. Several days of very warm readings are likely which could lead to heat related issues. At the coast temperatures will be more moderate.
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 8:03 AM PDT | Heat Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 3 more | 4 days |
| Aug 25, 2:46 PM PDT | Small Craft Advisory | MTR | 12 hr |
Nearby
Excessive Heat Warnings in California, 2017Every excessive heat warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.