NOAA NWS / Event history

Red Flag Warning issued October 16 at 10:38AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA

Red Flag Warning · North Bay Interior Mountains. Severe; likely; urgency: expected.

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Bulletin issued: 16 October 2026 at 17:38 UTC
First saved by us: 15 October 2026 at 18:47 UTC
Last included in a daily record: 16 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: Severe · Source update

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

Issuer / area: NWS San Francisco CA · North Bay Interior Mountains
Certainty / urgency: Likely / Expected
Message expiry (not hazard end): 16 October 2026 at 18:45 UTC
Forecast onset / end: 16 October 2026 at 17:38 UTC / 16 October 2026 at 18:00 UTC

Archived official description

The strongest north-northeasterly winds are beginning to diminish this morning and will continue to do so through the afternoon across the North Bay Interior Mountains. Therefore, the Red Flag Warning will be allowed to expire at 11 AM PDT. However, near critical fire weather conditions will persist through Saturday due to weak offshore winds and poor humidity values in the higher elevations.

The saved record

What changed

2 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

Showing 2 changes

Saved by us
16 October 2026 at 17:47 UTC
Version 3
8 recorded details changed
Title
Before
Red Flag Warning issued October 16 at 12:17AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA
After
Red Flag Warning issued October 16 at 10:38AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA
Source updated
Before
16 October 2026 at 07:17 UTC
After
16 October 2026 at 17:38 UTC
Effective from
Before
16 October 2026 at 07:17 UTC
After
16 October 2026 at 17:38 UTC
Forecast onset
Before
16 October 2026 at 07:17 UTC
After
16 October 2026 at 17:38 UTC
Message expiry
Before
16 October 2026 at 18:00 UTC
After
16 October 2026 at 18:45 UTC
Official description
Before
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR NORTH BAY INTERIOR MOUNTAINS... * AFFECTED AREA...North Bay Interior Mountains. * TIMING...Until 11 AM PDT this morning. * WINDS 20 FOOT...North winds 10 to 15 mph with gusts between 30 to 40 mph. The highest peaks above 4000 ft will see gusts up to 60 mph. * RELATIVE HUMIDITY...Relative Humidity between 13 to 23 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
After
The strongest north-northeasterly winds are beginning to diminish this morning and will continue to do so through the afternoon across the North Bay Interior Mountains. Therefore, the Red Flag Warning will be allowed to expire at 11 AM PDT. However, near critical fire weather conditions will persist through Saturday due to weak offshore winds and poor humidity values in the higher elevations.
Official instructions
Before
A Red Flag Warning is issued when weather conditions that promote rapid spread of fire which may become life-threatening are forecast. This does not mean there is a fire. These conditions are either occurring now or will begin soon. It is important to have multiple ways to receive information from authorities. Follow all fire restrictions. One less spark, one less wildfire. Never leave burning debris or camp fires unattended; extinguish them completely. Avoid using equipment or machinery that could create a spark. Secure tow chains to avoid dragging and subsequent sparks. Never toss cigarette butts out of your vehicle's window. Remember, one less spark, one less flame. Familiarize yourself with your emergency plan! Where will you go? How will you get there? Do you have your go kit ready to go? Who will you call to let others know you are safe? Visit ready.gov/plan for more information.
After
Not supplied
External source link
Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5e057d0e5950939440f17d93bf9bbd6a5aa05e8d.001.1
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.63bdf8a57df2911a349c975714a26b24401c1011.001.1
Bulletin issued: 16 October 2026 at 17:38 UTC
View saved version 3
Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.
{ "id": "nws:be2b3037272e21fad2abe911", "authorityId": "urn:oid:2.49.0.1.840.0.63bdf8a57df2911a349c975714a26b24401c1011.001.1", "sender": "w-nws.webmaster@noaa.gov", "references": [ { "identifier": "urn:oid:2.49.0.1.840.0.5e057d0e5950939440f17d93bf9bbd6a5aa05e8d.001.1", "sender": "w-nws.webmaster@noaa.gov" }, { "identifier": "urn:oid:2.49.0.1.840.0.77f149f3d3193cfb48551d63fa3c7f7389b49c31.001.2", "sender": "w-nws.webmaster@noaa.gov" } ], "category": "weather", "title": "Red Flag Warning issued October 16 at 10:38AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA", "eventType": "Red Flag Warning", "occurredAt": "2026-10-16T17:38:00.000Z", "issuedAt": "2026-10-16T17:38:00.000Z", "timeBasis": "Bulletin issued", "effectiveAt": "2026-10-16T17:38:00.000Z", "onsetAt": "2026-10-16T17:38:00.000Z", "expiresAt": "2026-10-16T18:45:00.000Z", "forecastEndAt": "2026-10-16T18:00:00.000Z", "severity": "Severe", "urgency": "Expected", "certainty": "Likely", "messageType": "Update", "status": "Source update", "place": "North Bay Interior Mountains", "coordinates": null, "issuer": "NWS San Francisco CA", "summary": "Red Flag Warning · North Bay Interior Mountains. Severe; likely; urgency: expected.", "description": "The strongest north-northeasterly winds are beginning to diminish\nthis morning and will continue to do so through the afternoon across\nthe North Bay Interior Mountains. Therefore, the Red Flag Warning\nwill be allowed to expire at 11 AM PDT.\n\nHowever, near critical fire weather conditions will persist through\nSaturday due to weak offshore winds and poor humidity values in the\nhigher elevations.", "instruction": "", "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.63bdf8a57df2911a349c975714a26b24401c1011.001.1", "source": "nws", "sourceName": "NOAA NWS" }
Visit the external source ↗
The external page may have changed since this version was saved.
Saved by us
16 October 2026 at 07:32 UTC
Version 2
Source status changed
Title
Before
Red Flag Warning issued October 15 at 11:40AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA
After
Red Flag Warning issued October 16 at 12:17AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA
Source updated
Before
15 October 2026 at 18:40 UTC
After
16 October 2026 at 07:17 UTC
Effective from
Before
15 October 2026 at 18:40 UTC
After
16 October 2026 at 07:17 UTC
Forecast onset
Before
16 October 2026 at 05:00 UTC
After
16 October 2026 at 07:17 UTC
Message type
Before
Alert
After
Update
Source status
Before
Source alert
After
Source update
Official description
Before
...RED FLAG WARNING IN EFFECT FROM 10 PM THIS EVENING TO 11 AM PDT FRIDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR NORTH BAY INTERIOR MOUNTAINS... .Moderate offshore winds will develop Thursday evening into Friday morning over the North Bay Interior Mountains. Conditions will be very dry with very poor overnight humidity recoveries only reaching 14 to 24 percent. Rapid fire spread is possible given the combination of gusty northerly winds and very dry overnight conditions. The National Weather Service in San Francisco CA has issued a Red Flag Warning in effect from 10 PM this evening to 11 AM PDT Friday. * AFFECTED AREA...North Bay Interior Mountains. * TIMING...From 10 PM this evening to 11 AM PDT Friday. * WINDS 20 FOOT...North winds 20 to 30 mph with gusts up to 40 mph. The highest peaks above 4000ft will see gusts up to 60 mph. * RELATIVE HUMIDITY...Relative Humidity between 16 to 20 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
After
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR NORTH BAY INTERIOR MOUNTAINS... * AFFECTED AREA...North Bay Interior Mountains. * TIMING...Until 11 AM PDT this morning. * WINDS 20 FOOT...North winds 10 to 15 mph with gusts between 30 to 40 mph. The highest peaks above 4000 ft will see gusts up to 60 mph. * RELATIVE HUMIDITY...Relative Humidity between 13 to 23 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
Official instructions
Before
…ither occurring now or will begin soon. It is important to have multiple ways to receive information from authorities. ~~Please advise responding agencies or fire crews in the field of this fire weather alert.~~ Follow all fire restrictions. One less spark, one less wildfire. Never leave burning debris or camp fires unattended; e…
After
…ither occurring now or will begin soon. It is important to have multiple ways to receive information from authorities. Follow all fire restrictions. One less spark, one less wildfire. Never leave burning debris or camp fires unattended; e…
External source link
Before
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.77f149f3d3193cfb48551d63fa3c7f7389b49c31.001.2
After
https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5e057d0e5950939440f17d93bf9bbd6a5aa05e8d.001.1
Bulletin issued: 16 October 2026 at 07:17 UTC
View saved version 2
Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.
{ "id": "nws:da9d4df259595ee06b22c89c", "authorityId": "urn:oid:2.49.0.1.840.0.5e057d0e5950939440f17d93bf9bbd6a5aa05e8d.001.1", "sender": "w-nws.webmaster@noaa.gov", "references": [ { "identifier": "urn:oid:2.49.0.1.840.0.77f149f3d3193cfb48551d63fa3c7f7389b49c31.001.2", "sender": "w-nws.webmaster@noaa.gov" } ], "category": "weather", "title": "Red Flag Warning issued October 16 at 12:17AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA", "eventType": "Red Flag Warning", "occurredAt": "2026-10-16T07:17:00.000Z", "issuedAt": "2026-10-16T07:17:00.000Z", "timeBasis": "Bulletin issued", "effectiveAt": "2026-10-16T07:17:00.000Z", "onsetAt": "2026-10-16T07:17:00.000Z", "expiresAt": "2026-10-16T18:00:00.000Z", "forecastEndAt": "2026-10-16T18:00:00.000Z", "severity": "Severe", "urgency": "Expected", "certainty": "Likely", "messageType": "Update", "status": "Source update", "place": "North Bay Interior Mountains", "coordinates": null, "issuer": "NWS San Francisco CA", "summary": "Red Flag Warning · North Bay Interior Mountains. Severe; likely; urgency: expected.", "description": "...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING\nDUE TO WIND AND LOW RELATIVE HUMIDITY FOR NORTH BAY INTERIOR\nMOUNTAINS...\n\n* AFFECTED AREA...North Bay Interior Mountains.\n\n* TIMING...Until 11 AM PDT this morning.\n\n* WINDS 20 FOOT...North winds 10 to 15 mph with gusts between 30 to\n40 mph. The highest peaks above 4000 ft will see gusts up to 60\nmph.\n\n* RELATIVE HUMIDITY...Relative Humidity between 13 to 23 percent.\n\n* IMPACTS...Any fires that develop will likely spread rapidly.\nOutdoor burning is not recommended.", "instruction": "A Red Flag Warning is issued when weather conditions that promote\nrapid spread of fire which may become life-threatening are forecast.\nThis does not mean there is a fire. These conditions are either\noccurring now or will begin soon. It is important to have multiple\nways to receive information from authorities.\n\nFollow all fire restrictions. One less spark, one less wildfire.\n\nNever leave burning debris or camp fires unattended; extinguish them\ncompletely. Avoid using equipment or machinery that could create a\nspark. Secure tow chains to avoid dragging and subsequent sparks.\nNever toss cigarette butts out of your vehicle's window. Remember,\none less spark, one less flame.\n\nFamiliarize yourself with your emergency plan! Where will you go? How\nwill you get there? Do you have your go kit ready to go? Who will you\ncall to let others know you are safe? Visit ready.gov/plan for more\ninformation.", "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5e057d0e5950939440f17d93bf9bbd6a5aa05e8d.001.1", "source": "nws", "sourceName": "NOAA NWS" }
Visit the external source ↗
The external page may have changed since this version was saved.

First saved record · 15 October 2026 at 18:47 UTC

Saved by us

15 October 2026 at 18:47 UTC

Starting point

First saved record

Our first saved version of Red Flag Warning issued October 15 at 11:40AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA. We have no earlier saved version to compare.

Bulletin issued: 15 October 2026 at 18:40 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:8e8274384dc46a1d839cfb07",
  "authorityId": "urn:oid:2.49.0.1.840.0.77f149f3d3193cfb48551d63fa3c7f7389b49c31.001.2",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Red Flag Warning issued October 15 at 11:40AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA",
  "eventType": "Red Flag Warning",
  "occurredAt": "2026-10-15T18:40:00.000Z",
  "issuedAt": "2026-10-15T18:40:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-15T18:40:00.000Z",
  "onsetAt": "2026-10-16T05:00:00.000Z",
  "expiresAt": "2026-10-16T18:00:00.000Z",
  "forecastEndAt": "2026-10-16T18:00:00.000Z",
  "severity": "Severe",
  "urgency": "Expected",
  "certainty": "Likely",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "North Bay Interior Mountains",
  "coordinates": null,
  "issuer": "NWS San Francisco CA",
  "summary": "Red Flag Warning · North Bay Interior Mountains. Severe; likely; urgency: expected.",
  "description": "...RED FLAG WARNING IN EFFECT FROM 10 PM THIS EVENING TO 11 AM PDT\nFRIDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR NORTH BAY INTERIOR\nMOUNTAINS...\n\n.Moderate offshore winds will develop Thursday evening into Friday\nmorning over the North Bay Interior Mountains. Conditions will be\nvery dry with very poor overnight humidity recoveries only reaching\n14 to 24 percent. Rapid fire spread is possible given the combination\nof gusty northerly winds and very dry overnight conditions.\n\nThe National Weather Service in San Francisco CA has issued a Red\nFlag Warning in effect from 10 PM this evening to 11 AM PDT Friday.\n\n* AFFECTED AREA...North Bay Interior Mountains.\n\n* TIMING...From 10 PM this evening to 11 AM PDT Friday.\n\n* WINDS 20 FOOT...North winds 20 to 30 mph with gusts up to 40 mph.\nThe highest peaks above 4000ft will see gusts up to 60 mph.\n\n* RELATIVE HUMIDITY...Relative Humidity between 16 to 20 percent.\n\n* IMPACTS...Any fires that develop will likely spread rapidly.\nOutdoor burning is not recommended.",
  "instruction": "A Red Flag Warning is issued when weather conditions that promote\nrapid spread of fire which may become life-threatening are forecast.\nThis does not mean there is a fire. These conditions are either\noccurring now or will begin soon. It is important to have multiple\nways to receive information from authorities.\n\nPlease advise responding agencies or fire crews in the field of this\nfire weather alert.\n\nFollow all fire restrictions. One less spark, one less wildfire.\n\nNever leave burning debris or camp fires unattended; extinguish them\ncompletely. Avoid using equipment or machinery that could create a\nspark. Secure tow chains to avoid dragging and subsequent sparks.\nNever toss cigarette butts out of your vehicle's window. Remember,\none less spark, one less flame.\n\nFamiliarize yourself with your emergency plan! Where will you go? How\nwill you get there? Do you have your go kit ready to go? Who will you\ncall to let others know you are safe? Visit ready.gov/plan for more\ninformation.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.77f149f3d3193cfb48551d63fa3c7f7389b49c31.001.2",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

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The external page may have changed since this version was saved.

Red Flag Warning issued October 16 at 10:38AM PDT until October 16 at 11:00AM PDT by NWS San Francisco CA

Archived official description

What changed

8 recorded details changed

Source status changed

First saved record