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Storm Mode / Tracked area

Flash flooding: California

Wall mode

0 warnings total · 0 tornado warnings · 0 alerts including watches and advisories

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0 of 0 alerts

No active alerts reported by the current feed in this monitoring area.

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Map

NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked . Data: NOAA/NWS, NOAA/SPC.

Agency warning geometry · no observed imagery displayed
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Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.

Alert outlines: NOAA/NWS; cell points/observed segments: IEM/NEXRAD. A warning polygon is not a tornado footprint.

Lightning activity — GOES GLM

Total lightning, including in-cloud activity. Not ground-strike locations or a safe-to-go-outside signal.

Cached lightning observations have not loaded. An empty map is not zero lightning.

Cached lightning source details and text readings

Snow analysis — NOHRSC

Source-rendered snow depth and snow water equivalent for the lower 48. History changes this snow picture only; warnings and radar keep their own clocks.

Stored snow depth · footprint valid 2026-10-18 00:00:00 UTC, picture retrieved 2026-10-18 06:23:06.237 UTC.

No NOHRSC picture displayed on the interactive map.

  • 0 - 0.39 in
  • 0.39 - 2.0 in
  • 2.0 - 3.9 in
  • 3.9 - 9.8 in
  • 9.8 - 20 in
  • 20 - 39 in
  • 39 - 59 in
  • 59 - 98 in
  • 98 - 197 in
  • 197 - 295 in
  • 295 - 394 in
  • 394 - 787 in
NOHRSC snow analysis for the lower 48; see the adjacent source legend and time qualification
NOAA/NWS/NOHRSC’s original picture and legend. No station or address value is inferred.

NOHRSC footprint times are metadata; pixel analysis time is not independently verified. Snow-depth pixels have previously differed from the footprint time. This is modeled/assimilated snow analysis, not a measurement at a place. Unshaded and no-data areas do not establish zero snow.

Snow pictures, retained history and source provenance

Change time or forecast product

Replay uses retained source bytes. Recording begins with activation; missing history is not clear weather.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

No observed replay frame displayed.

Open the complete replay reader (works without scripting or WebGL)
Radar-derived cells (0) · current

Collector checked ; feed generated . Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

    Station and river observations (100)

    Surface source current; observed water-level source current. Each reading keeps its own time. Map markers show at most 500 stations and 500 gauges; the complete source directory is paginated.

    Circle: surface station; square: water-level gauge. Filled: current reading and source; hollow: stale, unconfirmed or missing observation. Marker color is not a hazard category. Enable “Stations and gauges” in Layers to inspect them on the map.

    Showing 100 of 100 listed sources. All surface stations and retained trends · All supported gauges and forecasts

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    Water-level gauge MCBC1

    current · Observed 169.29 ft at 2026-10-18 06:30:00 UTC · Action stage.

    Lake or reservoir level · Marsh Creek Reservoir · Marsh Creek Reservoir · -121.726111, 37.89. Units ft; datum not supplied.

    Source checked 2026-10-18 07:55:05.788Z · current.

    Stage in this gauge’s units, not a regional flood depth. Tide/lake gauges remain water levels; datum is not supplied by this feed. Historical observations and the latest forecast keep separate times.

    Retained observations: 52; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:05.234Z; oldest available reading 2026-10-17 08:30:00 UTC.

    Observed stage and separate NWS forecast at MCBC1 (ft)Dots are retained observations. Lines break for missing fields, long intervals or changed station location or units. 0 recorded discontinuities. Dashed lines, when present, are the separately issued NWS forecast.170.3168.3ft10-17 08:30Z10-18 06:30Z2026-10-17 08:30:00 UTC · 169.29 ft2026-10-17 08:45:00 UTC · 169.29 ft2026-10-17 09:15:00 UTC · 169.29 ft2026-10-17 09:30:00 UTC · 169.29 ft2026-10-17 10:15:00 UTC · 169.29 ft2026-10-17 10:30:00 UTC · 169.3 ft2026-10-17 10:45:00 UTC · 169.29 ft2026-10-17 11:15:00 UTC · 169.29 ft2026-10-17 11:45:00 UTC · 169.3 ft2026-10-17 12:15:00 UTC · 169.3 ft2026-10-17 12:45:00 UTC · 169.29 ft2026-10-17 13:00:00 UTC · 169.29 ft2026-10-17 13:30:00 UTC · 169.29 ft2026-10-17 14:00:00 UTC · 169.29 ft2026-10-17 14:30:00 UTC · 169.29 ft2026-10-17 15:00:00 UTC · 169.29 ft2026-10-17 15:15:00 UTC · 169.3 ft2026-10-17 15:30:00 UTC · 169.28 ft2026-10-17 16:00:00 UTC · 169.3 ft2026-10-17 16:30:00 UTC · 169.3 ft2026-10-17 17:00:00 UTC · 169.29 ft2026-10-17 18:30:00 UTC · 169.28 ft2026-10-17 19:00:00 UTC · 169.28 ft2026-10-17 19:30:00 UTC · 169.29 ft2026-10-17 20:00:00 UTC · 169.29 ft2026-10-17 20:30:00 UTC · 169.28 ft2026-10-17 21:00:00 UTC · 169.29 ft2026-10-17 21:15:00 UTC · 169.29 ft2026-10-17 21:30:00 UTC · 169.29 ft2026-10-17 21:45:00 UTC · 169.29 ft2026-10-17 22:45:00 UTC · 169.29 ft2026-10-17 23:00:00 UTC · 169.29 ft2026-10-17 23:15:00 UTC · 169.29 ft2026-10-17 23:45:00 UTC · 169.29 ft2026-10-18 00:00:00 UTC · 169.28 ft2026-10-18 00:15:00 UTC · 169.29 ft2026-10-18 00:30:00 UTC · 169.28 ft2026-10-18 01:00:00 UTC · 169.28 ft2026-10-18 01:30:00 UTC · 169.28 ft2026-10-18 02:00:00 UTC · 169.28 ft2026-10-18 02:15:00 UTC · 169.29 ft2026-10-18 02:30:00 UTC · 169.29 ft2026-10-18 03:00:00 UTC · 169.28 ft2026-10-18 03:30:00 UTC · 169.28 ft2026-10-18 04:00:00 UTC · 169.29 ft2026-10-18 04:45:00 UTC · 169.29 ft2026-10-18 05:00:00 UTC · 169.29 ft2026-10-18 05:15:00 UTC · 169.3 ft2026-10-18 05:45:00 UTC · 169.29 ft2026-10-18 06:00:00 UTC · 169.29 ft2026-10-18 06:15:00 UTC · 169.29 ft2026-10-18 06:30:00 UTC · 169.29 ft
    Observed stage and separate NWS forecast · 52 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

    NWS forecast · current

    No forecast maximum supplied.

    Impacts and the full forecast are read for gauges in flood; this one is at action stage.

    Gauge thresholds: action 168 ft; minor 192 ft; moderate not set; major not set.

    Observed reports as a table (52)
    Observed (UTC)Stage / unitsSource category / water
    2026-10-17 08:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 08:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 09:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 09:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 10:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 10:30:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-17 10:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 11:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 11:45:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-17 12:15:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-17 12:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 13:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 13:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 14:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 14:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 15:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 15:15:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-17 15:30:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-17 16:00:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-17 16:30:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-17 17:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 18:30:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-17 19:00:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-17 19:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 20:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 20:30:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-17 21:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 21:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 21:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 21:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 22:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 23:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 23:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-17 23:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 00:00:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 00:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 00:30:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 01:00:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 01:30:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 02:00:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 02:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 02:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 03:00:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 03:30:00 UTC169.28 ftAction stage · Lake or reservoir level
    2026-10-18 04:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 04:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 05:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 05:15:00 UTC169.3 ftAction stage · Lake or reservoir level
    2026-10-18 05:45:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 06:00:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 06:15:00 UTC169.29 ftAction stage · Lake or reservoir level
    2026-10-18 06:30:00 UTC169.29 ftAction stage · Lake or reservoir level
    Capture times, quality and provenance

    Each report keeps its observation time, first capture of this version, and the SHA-256 of the source bulk body. Corrections at the same observation time replace that point and are marked; unrelated bulk-file changes do not freshen a report.

    • Observed 2026-10-17 08:30:00 UTC, captured 2026-10-17 09:45:05.916Z; source body SHA-256 0d8a80be93500a5f3bdc37d2e564df5d4898bc27d32306a97751b1cd420138f9.
    • Observed 2026-10-17 08:45:00 UTC, captured 2026-10-17 10:05:03.340Z; source body SHA-256 1de62a16559f0f67aea45a5a3342bde8ec10276966859c007f757b8c42f4fa06.
    • Observed 2026-10-17 09:15:00 UTC, captured 2026-10-17 10:25:07.123Z; source body SHA-256 503ac40ded76b5d404f4e3d833c8e73f53a40cf19d40759af09f6b4a1fbabb51.
    • Observed 2026-10-17 09:30:00 UTC, captured 2026-10-17 10:45:07.923Z; source body SHA-256 7bb0ccc8f7c5d0a6391ad58c0963386b4333a19b2efea1078e71df1a573af4f8.
    • Observed 2026-10-17 10:15:00 UTC, captured 2026-10-17 11:25:04.901Z; source body SHA-256 163463820a36b1abc4d5789e0f373a81bced123923cfa23c52a385057cb95ced.
    • Observed 2026-10-17 10:30:00 UTC, captured 2026-10-17 11:45:05.971Z; source body SHA-256 9580f94d36bb51766baca293fb8a39ee092bfc1d573ffd9b5d0075bf0abf910c.
    • Observed 2026-10-17 10:45:00 UTC, captured 2026-10-17 12:15:06.312Z; source body SHA-256 df504ec583e521c13a5d7f0fb8c220a746304ddf1608cd32083abdcbe8805ca2.
    • Observed 2026-10-17 11:15:00 UTC, captured 2026-10-17 12:25:04.706Z; source body SHA-256 e6451c9a3a59d9e26df764245e2ab65eaed6e9262d10ee305059ef67ae0855ab.
    • Observed 2026-10-17 11:45:00 UTC, captured 2026-10-17 12:45:05.750Z; source body SHA-256 700f3ed3aad038cefd2d0e32ab78d3be567c5e53c8643550abb468f356930314.
    • Observed 2026-10-17 12:15:00 UTC, captured 2026-10-17 13:25:04.961Z; source body SHA-256 58f719d9c97eff019011ef8b3da64e8c3e7d635c47647d4062a7b01a3ae9bcce.
    • Observed 2026-10-17 12:45:00 UTC, captured 2026-10-17 13:45:07.143Z; source body SHA-256 152c859ad430a8e0d2ffc28a0f51f5130404f5f6721b81e140d5688b4fdcea57.
    • Observed 2026-10-17 13:00:00 UTC, captured 2026-10-17 14:25:05.799Z; source body SHA-256 77ada875fbad293471886c1bbc309a0f54e03ad184729315b30b6863c3ca160e.
    • Observed 2026-10-17 13:30:00 UTC, captured 2026-10-17 14:45:09.236Z; source body SHA-256 a6833f55ffe1968d740aeafafef620a72fad0253d816679bb8a664b231f7709e.
    • Observed 2026-10-17 14:00:00 UTC, captured 2026-10-17 15:15:07.641Z; source body SHA-256 ea313f66056f1bec8636559e8be082e58b1fb40f9a105800c6945eecdcc89377.
    • Observed 2026-10-17 14:30:00 UTC, captured 2026-10-17 15:45:05.072Z; source body SHA-256 bc46093667a909a382a079b402336f71b796cc7127c1e4794ebdd3983666ee0c.
    • Observed 2026-10-17 15:00:00 UTC, captured 2026-10-17 16:05:06.339Z; source body SHA-256 108fdf3d7caa94c8b7dd063a1d6adc577886014bf6b6e137c34c586c355427bd.
    • Observed 2026-10-17 15:15:00 UTC, captured 2026-10-17 16:25:05.973Z; source body SHA-256 e0876763ccc093088d69a6a1b4f619ffa0b6c742859010030d0fb249976221d8.
    • Observed 2026-10-17 15:30:00 UTC, captured 2026-10-17 16:45:35.615Z; source body SHA-256 0b40be2ac7a73e9497b09028d28aaaa9d33fa6164f556ed7412c6426a786a251.
    • Observed 2026-10-17 16:00:00 UTC, captured 2026-10-17 17:05:05.312Z; source body SHA-256 282edd347f9ad09c4a2331020f2ff596388b0091bb38ea6fcded708fb4f607b9.
    • Observed 2026-10-17 16:30:00 UTC, captured 2026-10-17 17:45:05.445Z; source body SHA-256 3cccde1ecb1a1c168ec49fc749b2d560958c18957a8f3242181fe5c64f160c46.
    • Observed 2026-10-17 17:00:00 UTC, captured 2026-10-17 18:05:09.547Z; source body SHA-256 ce9665c1ab24da7c324f37374177f4e5b72455c2ef6565cd5c0d732217d9f0ee.
    • Observed 2026-10-17 18:30:00 UTC, captured 2026-10-17 19:45:07.297Z; source body SHA-256 0c5c2e951418422e829868d6340e946c222cc8c6fefd6061bb657410339e4df2.
    • Observed 2026-10-17 19:00:00 UTC, captured 2026-10-17 20:15:05.656Z; source body SHA-256 978c265e2ebfbdcade996208019f4b29023bc6cfb1fc479009c87544e6d1da3f.
    • Observed 2026-10-17 19:30:00 UTC, captured 2026-10-17 20:45:05.720Z; source body SHA-256 7f2551438267833ec9353db6d05261524189c53bd2e697f348f7df87ddf399b5.
    • Observed 2026-10-17 20:00:00 UTC, captured 2026-10-17 21:15:05.435Z; source body SHA-256 c94229fb5300201c94e1548e638f2b09b7823a34bd5d5740f493d84adaf0912a.
    • Observed 2026-10-17 20:30:00 UTC, captured 2026-10-17 21:45:07.045Z; source body SHA-256 43a2e7d545d29fab597c64dfa377979cf0e4cde3c006abfee356d3d9551278cc.
    • Observed 2026-10-17 21:00:00 UTC, captured 2026-10-17 22:15:06.483Z; source body SHA-256 74b9142e78a52de089bc6fcfa68539998c805f0d5788d873a4a6be36d1ba5a12.
    • Observed 2026-10-17 21:15:00 UTC, captured 2026-10-17 22:25:06.849Z; source body SHA-256 9bf964242c4addae0d20866f2d831a9e64ccba11ea3c1b463329b9278533380e.
    • Observed 2026-10-17 21:30:00 UTC, captured 2026-10-17 22:45:06.961Z; source body SHA-256 81897733eaebfe0f53f6bd6934cb4096aec879e50dcd7cdd4ea70fc8c6e69354.
    • Observed 2026-10-17 21:45:00 UTC, captured 2026-10-17 23:05:05.289Z; source body SHA-256 7a38b3030ef43ab69730043f5edb13dbb80532491db42f540b7c72a19de86bf4.
    • Observed 2026-10-17 22:45:00 UTC, captured 2026-10-17 23:45:07.141Z; source body SHA-256 e0aa2cdbffe75e84b482e35023ac443e84b1c9dd6a699489f102761b277e05b7.
    • Observed 2026-10-17 23:00:00 UTC, captured 2026-10-18 00:15:07.850Z; source body SHA-256 7af636e43e4b574d14089e61c9d08219091cf9a4e343a3f93fb3e27f7307f6b7.
    • Observed 2026-10-17 23:15:00 UTC, captured 2026-10-18 00:25:06.204Z; source body SHA-256 d05b4112c083f82757f110a6e33eb3863e102b95953e751bf95dba00c1140de3.
    • Observed 2026-10-17 23:45:00 UTC, captured 2026-10-18 00:45:06.728Z; source body SHA-256 afec4416ea0f8de0c9a380660fb699f0e6f2f6de46c7f2306163e8220dd91163.
    • Observed 2026-10-18 00:00:00 UTC, captured 2026-10-18 01:05:05.183Z; source body SHA-256 b4b568ffea5d1284346a71afe8c92556989f3ceaadc7ae4d239f59ab1322b015.
    • Observed 2026-10-18 00:15:00 UTC, captured 2026-10-18 01:25:06.453Z; source body SHA-256 e409fc97034bfb40176782eb786aad2fea65de1c5495bf843e8769c4e41a58d8.
    • Observed 2026-10-18 00:30:00 UTC, captured 2026-10-18 01:45:07.743Z; source body SHA-256 96839b0335ecd43c6dabc983d11df8aeab91e36e5e3372f860eba9f2b2d95541.
    • Observed 2026-10-18 01:00:00 UTC, captured 2026-10-18 02:05:13.475Z; source body SHA-256 609014cbaf42a285bd9ab740fbbab7bbddaaac03beb23c6f16486c8eeeefb6c9.
    • Observed 2026-10-18 01:30:00 UTC, captured 2026-10-18 02:45:07.313Z; source body SHA-256 62c302570e4c9664062c4d26c0d93ac08750be9a01c8a2e2ac4de36859f02861.
    • Observed 2026-10-18 02:00:00 UTC, captured 2026-10-18 03:05:05.418Z; source body SHA-256 d06efc0ced14d54fb4a70b735eb6bbb109bfd4150373a2e997b781e255fba709.
    • Observed 2026-10-18 02:15:00 UTC, captured 2026-10-18 03:25:06.216Z; source body SHA-256 92f2e27fc506ae63afc75604b8a292744564efc8ffb32faf9d88a12f922eaf04.
    • Observed 2026-10-18 02:30:00 UTC, captured 2026-10-18 03:45:07.896Z; source body SHA-256 4887920066f1fd446f3fc0a9c54e7c8d1c5ed9910016019e90ef50b19ca74968.
    • Observed 2026-10-18 03:00:00 UTC, captured 2026-10-18 04:15:08.591Z; source body SHA-256 aa1cb2ef65ba7b274bcd9c396bacc62e12dbb4807c84ca9261ae6ed15974efdb.
    • Observed 2026-10-18 03:30:00 UTC, captured 2026-10-18 04:45:06.385Z; source body SHA-256 8cea083d6932c01bf6481890352407106b23688126b53d02872d2802cf6bae93.
    • Observed 2026-10-18 04:00:00 UTC, captured 2026-10-18 05:05:06.101Z; source body SHA-256 7d2a2a1beb8ded2dc92980cdd42aa3ddd422baacc17289ea7499806fcf347ecb.
    • Observed 2026-10-18 04:45:00 UTC, captured 2026-10-18 05:45:06.584Z; source body SHA-256 6ed9115dfead54b0e075dfbe05d2b62ebd3130e8f5d1f4f403faba9da112763a.
    • Observed 2026-10-18 05:00:00 UTC, captured 2026-10-18 06:05:04.649Z; source body SHA-256 d2aa1aa2e2199d0fa4754982dfc447d915b211d5b307c5f0b8e0af8a2fa9f7e1.
    • Observed 2026-10-18 05:15:00 UTC, captured 2026-10-18 06:25:07.255Z; source body SHA-256 bbdb5d8c6ac8ff7be76b3e4d06da12e0a7f91808818326c330883d515386c964.
    • Observed 2026-10-18 05:45:00 UTC, captured 2026-10-18 06:45:07.545Z; source body SHA-256 9cc0eb80af90f52238c726b6d50cafa53d7706bcb8d83f269f808e2365fab14b.
    • Observed 2026-10-18 06:00:00 UTC, captured 2026-10-18 07:05:07.012Z; source body SHA-256 e83875034eef60adf5b79996c0a56b9f085bf687a1856093a51e3a12c0fce5c3.
    • Observed 2026-10-18 06:15:00 UTC, captured 2026-10-18 07:25:06.987Z; source body SHA-256 69fe98220b73acbbf241d232d2909186aa6610c9ac7171646f63da1da9f23324.
    • Observed 2026-10-18 06:30:00 UTC, captured 2026-10-18 07:45:07.607Z; source body SHA-256 4bdcf2cef98e5f87b603cbd695cbb63232454cb4c24d84d3f90eead72e55b0c4.

    Only observed gauge records enter this history. Forecast maxima and forecast hydrograph points never become observations. A missing datum or unsupported flow value remains unknown.

    Observation source page · Cached readings as JSON · Official source

    Recent source changes

    Recording coverage and limits
    • warnings: retained from 2026-10-17T08:00:11.777Z through 2026-10-18T08:00:09.956Z
    • outlooks: retained from 2026-10-17T08:00:11.777Z through 2026-10-18T08:00:11.963Z
    • hydro: retained from 2026-10-17T08:00:11.777Z through 2026-10-18T07:55:07.943Z
    • analysis: retained from 2026-10-17T08:00:11.777Z through 2026-10-18T08:00:11.468Z
    • winter: retained from 2026-10-17T08:00:11.777Z through 2026-10-18T07:53:05.075Z

    Source-message history is not recorded imagery replay. Recorded radar/satellite imagery is not available in this view.

    Checks every minute; each layer keeps its own time.

    Spotlight: Flash-flood risk, Day 1

    1 of 4

    Flash-flood risk, Day 1

    • Marginal
    • Slight

    WPC’s excessive rainfall outlook, to , issued : a chance of flash flooding, in four categories. Data: NOAA/WPC.

    River gauges in flood

    No river, coastal or lake gauge in this area is in flood, observed or forecast; 1 gauge at action stage.

    NWS’s gauges at flood stage or above in the area, worst first, each with its forecast hydrograph on Rain & rivers. Data: NOAA/NWPS.

    Rain expected and rain that fell

    WPC’s rain forecast and MRMS’s radar estimate of the rain that fell, on the Briefing’s map for the area.

    Open Rain & rivers

    Data: NOAA/WPC, NOAA/NSSL MRMS.

    Radar

    NOAA’s radar for the area, loaded by your browser as on the Radar page.

    Open the radar

    Live tiles; the radar keeps no last-good copy.

    What changed, last 60 minutes

    since , when this server began watching this area

    Nothing has changed since 07:25Z.

    The products’ own words and times, and what is no longer in force since the last read. Never written by AI.

    Monitoring area, legacy alert summary and selection rules
    Area
    California (NWS states: CA)
    Hazards
    Flash flood warnings, watches and advisories, and the forecasts for them
    Window
    In force now, with the next days of SPC’s and WPC’s products
    Made by
    This address: anyone can make one, and nothing is stored. Change the area or hazards

    An area you chose, not a storm’s footprint: everything here is in force in this area, never “from this storm”.

    In force in this area

    No warning, watch or advisory for these hazards is in force in this area.

    NWS’s alerts checked : a successful check, so this is none in force, not “can’t tell”.

    Sources

    Choose another storm or areaChange monitoring areaSource status

    Not an official warning service. Warnings and watches are the National Weather Service’s, outlooks and reports the Storm Prediction Center’s and the Weather Prediction Center’s (Data: NOAA/NWS, NOAA/SPC, NOAA/WPC). When a warning is issued for you, act on it, and use weather.gov or a NOAA Weather Radio for where you are.