Flash-flood risk, Day 1
- Marginal
WPC’s excessive rainfall outlook, to , issued : a chance of flash flooding, in four categories. Data: NOAA/WPC.
CURRENT CONTEXT · 0 warnings total · 0 tornado warnings · 0 alerts including watches and advisories
Current alert feed · checked
Warnings in area
0 of 0 alertsNo active alerts reported by the current feed in this monitoring area.
Watched places
Places saved on this device appear here with scripting enabled.
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
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.
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 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.
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 (98)
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.
- KAAT · KAAT · current ·
- KACV · KACV · current ·
- KAJO · KAJO · current ·
- KAPC · KAPC · current ·
- KAUN · KAUN · current ·
- KBFL · KBFL · current ·
- KBIH · KBIH · current ·
- KBLH · KBLH · current ·
- KBUR · KBUR · current ·
- KC83 · KC83 · current ·
- KCCB · KCCB · current ·
- KCCR · KCCR · current ·
- KCEC · KCEC · current ·
- KCIC · KCIC · current ·
- KCMA · KCMA · current ·
- KCNO · KCNO · current ·
- KCPU · KCPU · current ·
- KCRQ · KCRQ · current ·
- KCVH · KCVH · current ·
- KDAG · KDAG · current ·
- KDVO · KDVO · current ·
- KDWA · KDWA · current ·
- KE16 · KE16 · current ·
- KEDU · KEDU · current ·
- KEDW · KEDW · current ·
- KEED · KEED · current ·
- KF70 · KF70 · current ·
- KFHM · KFHM · current ·
- KFOT · KFOT · current ·
- KFUL · KFUL · current ·
- KGOO · KGOO · current ·
- KHAF · KHAF · current ·
- KHJO · KHJO · current ·
- KHWD · KHWD · current ·
- KIPL · KIPL · current ·
- KIZA · KIZA · current ·
- KJAQ · KJAQ · current ·
- KL08 · KL08 · current ·
- KL18 · KL18 · current ·
- KLAX · KLAX · current ·
- KLGB · KLGB · current ·
- KLLR · KLLR · current ·
- KLPC · KLPC · current ·
- KLVK · KLVK · current ·
- KMCC · KMCC · current ·
- KMCE · KMCE · current ·
- KMHR · KMHR · current ·
- KMHS · KMHS · current ·
- KMHV · KMHV · current ·
- KMMH · KMMH · current ·
- KMOD · KMOD · current ·
- KMRY · KMRY · current ·
- KMYF · KMYF · current ·
- KNFG · KNFG · current ·
- KNJK · KNJK · current ·
- KNUQ · KNUQ · current ·
- KO05 · KO05 · current ·
- KO22 · KO22 · current ·
- KO26 · KO26 · current ·
- KO32 · KO32 · current ·
- KO54 · KO54 · current ·
- KO69 · KO69 · current ·
- KO86 · KO86 · current ·
- KOAK · KOAK · current ·
- KOAR · KOAR · current ·
- KONT · KONT · current ·
- KOVE · KOVE · current ·
- KOXR · KOXR · current ·
- KPMD · KPMD · current ·
- KPSP · KPSP · current ·
- KPVF · KPVF · current ·
- KRAL · KRAL · current ·
- KRBL · KRBL · current ·
- KRIV · KRIV · current ·
- KRNM · KRNM · current ·
- KSAC · KSAC · current ·
- KSBA · KSBA · current ·
- KSBD · KSBD · current ·
- KSBP · KSBP · current ·
- KSEE · KSEE · current ·
- KSIY · KSIY · current ·
- KSJC · KSJC · current ·
- KSLI · KSLI · current ·
- KSNS · KSNS · current ·
- KSQL · KSQL · current ·
- KSTS · KSTS · current ·
- KSVE · KSVE · current ·
- KTCY · KTCY · current ·
- KTRK · KTRK · current ·
- KTSP · KTSP · current ·
- KTVL · KTVL · current ·
- KUKI · KUKI · current ·
- KVCB · KVCB · current ·
- KVCV · KVCV · current ·
- KVNY · KVNY · current ·
- KWJF · KWJF · current ·
- KWVI · KWVI · current ·
- MCBC1 · Marsh Creek Reservoir · current ·
Showing 98 of 98 listed sources. All surface stations and retained trends · All supported gauges and forecasts
Selected details
CloseSurface station KO22
current · Observed 2026-10-18 09:55:00 UTC · wind 0 kt · temperature 13 °C.
Station KO22 · -120.415, 38.03 (longitude, latitude).
Source checked 2026-10-18 11:15:06.353Z · current.
Station observations, not an address forecast or cyclone maximum wind. Maintenance-flagged, old and implausible reports are excluded by the existing parser; this is not independent NWS quality control.
Retained observations: 38; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:07.108Z; oldest available reading 2026-10-17 11:35:00 UTC.
Temperature, dew point and pressure trends
Observed sea-level pressure: no readable observations.
Observed reports as a table (38)
| Observed (UTC) | Wind / gust (kt) | From (° true) | Temperature / dew point (°C) | Pressure (mb) | Visibility (mi) |
|---|---|---|---|---|---|
| 2026-10-17 11:35:00 UTC | 0 / Not reported | Calm | 10 / -1 | Not reported | 10 or more |
| 2026-10-17 12:15:00 UTC | 0 / Not reported | Calm | 11 / -2 | Not reported | 10 or more |
| 2026-10-17 12:55:00 UTC | 0 / Not reported | Calm | 11 / -2 | Not reported | 10 or more |
| 2026-10-17 13:15:00 UTC | 0 / Not reported | Calm | 11 / -2 | Not reported | 10 or more |
| 2026-10-17 13:35:00 UTC | 3 / Not reported | Variable | 12 / -3 | Not reported | 10 or more |
| 2026-10-17 13:55:00 UTC | 0 / Not reported | Calm | 14 / -4 | Not reported | 10 or more |
| 2026-10-17 14:35:00 UTC | 3 / Not reported | Variable | 12 / -3 | Not reported | 10 or more |
| 2026-10-17 14:55:00 UTC | 0 / Not reported | Calm | 14 / -3 | Not reported | 10 or more |
| 2026-10-17 15:15:00 UTC | 0 / Not reported | Calm | 14 / -1 | Not reported | 10 or more |
| 2026-10-17 15:35:00 UTC | 0 / Not reported | Calm | 16 / 0 | Not reported | 10 or more |
| 2026-10-17 15:55:00 UTC | 0 / Not reported | Calm | 18 / 1 | Not reported | 10 or more |
| 2026-10-17 16:15:00 UTC | 0 / Not reported | Calm | 21 / 2 | Not reported | 10 or more |
| 2026-10-17 16:35:00 UTC | 0 / Not reported | Calm | 25 / -4 | Not reported | 10 or more |
| 2026-10-17 16:55:00 UTC | 0 / Not reported | Calm | 27 / -3 | Not reported | 10 or more |
| 2026-10-17 17:35:00 UTC | 0 / Not reported | Calm | 29 / -5 | Not reported | 10 or more |
| 2026-10-17 17:55:00 UTC | 3 / Not reported | Variable | 29 / -5 | Not reported | 10 or more |
| 2026-10-17 18:15:00 UTC | 3 / Not reported | Variable | 30 / -3 | Not reported | 10 or more |
| 2026-10-17 18:35:00 UTC | 4 / Not reported | Variable | 30 / -3 | Not reported | 10 or more |
| 2026-10-17 19:15:00 UTC | 9 / Not reported | 240 | 30 / -2 | Not reported | 10 or more |
| 2026-10-17 19:55:00 UTC | 9 / 16 | 300 | 30 / -2 | Not reported | 10 or more |
| 2026-10-17 21:55:00 UTC | 10 / Not reported | 270 | 30 / 0 | Not reported | 10 or more |
| 2026-10-17 22:35:00 UTC | 8 / 14 | 260 | 30 / 0 | Not reported | 10 or more |
| 2026-10-17 23:15:00 UTC | 11 / Not reported | 270 | 29 / 0 | Not reported | 10 or more |
| 2026-10-17 23:55:00 UTC | 7 / Not reported | 270 | 29 / 0 | Not reported | 10 or more |
| 2026-10-18 00:15:00 UTC | 7 / Not reported | 260 | 28 / 1 | Not reported | 10 or more |
| 2026-10-18 00:35:00 UTC | 4 / Not reported | Variable | 28 / 0 | Not reported | 10 or more |
| 2026-10-18 01:15:00 UTC | 0 / Not reported | Calm | 26 / 0 | Not reported | 9 |
| 2026-10-18 05:15:00 UTC | 0 / Not reported | Calm | 14 / 1 | Not reported | 10 or more |
| 2026-10-18 05:35:00 UTC | 0 / Not reported | Calm | 14 / 1 | Not reported | 10 or more |
| 2026-10-18 06:15:00 UTC | 0 / Not reported | Calm | 13 / 1 | Not reported | 10 or more |
| 2026-10-18 06:35:00 UTC | 0 / Not reported | Calm | 13 / 1 | Not reported | 10 or more |
| 2026-10-18 07:15:00 UTC | 0 / Not reported | Calm | 12 / 1 | Not reported | 10 or more |
| 2026-10-18 07:35:00 UTC | 0 / Not reported | Calm | 12 / 1 | Not reported | 10 or more |
| 2026-10-18 07:55:00 UTC | 0 / Not reported | Calm | 12 / 1 | Not reported | 10 or more |
| 2026-10-18 08:15:00 UTC | 0 / Not reported | Calm | 12 / 1 | Not reported | 10 or more |
| 2026-10-18 08:55:00 UTC | 0 / Not reported | Calm | 12 / 1 | Not reported | 10 or more |
| 2026-10-18 09:15:00 UTC | 0 / Not reported | Calm | 12 / 1 | Not reported | 10 or more |
| 2026-10-18 09:55:00 UTC | 0 / Not reported | Calm | 13 / 1 | Not reported | 10 or more |
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 11:35:00 UTC, captured 2026-10-17 11:45:06.616Z; source body SHA-256
f7c801856f99557ed285ea2d3242c989100b943f230dadff0df38c8a48f1969e. - Observed 2026-10-17 12:15:00 UTC, captured 2026-10-17 12:30:06.477Z; source body SHA-256
e6b8647726852d6b09642c10d9839bf06b8b55bb7b2a6223efb9c23595245791. - Observed 2026-10-17 12:55:00 UTC, captured 2026-10-17 13:00:09.198Z; source body SHA-256
aa321e5db523e4ae79b5eb84e3edd54688a5b7f83f8b9534cd752d4abe9a07e1. - Observed 2026-10-17 13:15:00 UTC, captured 2026-10-17 13:30:06.013Z; source body SHA-256
b5c4ca6c0a5dfb11c059a2d4ccce7923dd869d39f2bc88b7080b8db54b05de6b. - Observed 2026-10-17 13:35:00 UTC, captured 2026-10-17 13:45:07.312Z; source body SHA-256
ae2fd339e3db840f298714215d70bd5d59e6875ebe4950cd99dc5f00d921b137. - Observed 2026-10-17 13:55:00 UTC, captured 2026-10-17 14:15:08.468Z; source body SHA-256
89c5e2da6c1df15fc284a3f38b9662d6ab7633272342363f5f2103f7f1dca9bc. - Observed 2026-10-17 14:35:00 UTC, captured 2026-10-17 14:45:08.203Z; source body SHA-256
d8f30f9f8cf3b7a47222fb2f314ac9318b3d3079009e45d8e7d36b75d32439a1. - Observed 2026-10-17 14:55:00 UTC, captured 2026-10-17 15:00:06.490Z; source body SHA-256
fd6f39df63ed66d82a0d722d3ba639a811bb9e87f6416735ea4ec817c4b69f7b. - Observed 2026-10-17 15:15:00 UTC, captured 2026-10-17 15:30:05.805Z; source body SHA-256
04ddddc39c74dc78ca7472e6371d50741ec1ed3c05a6510175b1eadce1fc59e6. - Observed 2026-10-17 15:35:00 UTC, captured 2026-10-17 15:45:05.420Z; source body SHA-256
5096c4f26050a27798b083ae67f9d17cef7044f9e7fbe0c0f4b8bc6751e6e48d. - Observed 2026-10-17 15:55:00 UTC, captured 2026-10-17 16:00:07.184Z; source body SHA-256
011c3be17b8bb37fe5f6ec9648267ed81c7e9853e6a8b98b8ad0bb065dff5968. - Observed 2026-10-17 16:15:00 UTC, captured 2026-10-17 16:30:06.505Z; source body SHA-256
74db22068716b46ae200c534183191486eca0eae11ae75373344b2be1b05dbc6. - Observed 2026-10-17 16:35:00 UTC, captured 2026-10-17 16:45:06.856Z; source body SHA-256
b0d5a15c7093ea45183076725714c0c630e9449149641a0e182f809ae2c2551e. - Observed 2026-10-17 16:55:00 UTC, captured 2026-10-17 17:00:06.696Z; source body SHA-256
b8be3a3f9dbb0f9d47f7f7d56c511352303f71121022093aee1718b59882e480. - Observed 2026-10-17 17:35:00 UTC, captured 2026-10-17 17:45:06.189Z; source body SHA-256
bb47c96590121b41a9feeb311f7c3d41c980d6bcd8429c717331c431e9054539. - Observed 2026-10-17 17:55:00 UTC, captured 2026-10-17 18:00:07.907Z; source body SHA-256
87f841dd0eda299799ecfa27669c14712906e9b7f2462af1e9aaebc60f5a4644. - Observed 2026-10-17 18:15:00 UTC, captured 2026-10-17 18:30:06.364Z; source body SHA-256
0d6d9bc3bb7f43638efd34fe901008409d28d015405c8aad14dafa1075c4d4b1. - Observed 2026-10-17 18:35:00 UTC, captured 2026-10-17 19:00:06.492Z; source body SHA-256
9b92790a99ac0e8c2777442829b2a9236f72d6e831b8d9a0836ca29a9d3acbba. - Observed 2026-10-17 19:15:00 UTC, captured 2026-10-17 19:30:06.052Z; source body SHA-256
aa7b05d3d8cd0f26f9597345b6479a140b0f5645da83ed257a55986a53983c29. - Observed 2026-10-17 19:55:00 UTC, captured 2026-10-17 20:00:08.337Z; source body SHA-256
b75985c438912b2da4a26e309fc2fbabef235be8a13c5848c5c5d64297850019. - Observed 2026-10-17 21:55:00 UTC, captured 2026-10-17 22:00:07.362Z; source body SHA-256
f1fa85855e007d5d5b85e6dbf4575f6d6bfe58fd5c9a7bb6d9e9cc636ec4c3b2. - Observed 2026-10-17 22:35:00 UTC, captured 2026-10-17 22:45:07.760Z; source body SHA-256
51938b1186526637d24b7545f93bc3e461e7b8bf18f3132a138ba4d2be8ed037. - Observed 2026-10-17 23:15:00 UTC, captured 2026-10-17 23:30:06.919Z; source body SHA-256
0810dfeebf9b707b97dadc235e485226db4bcabaca108a8bb7ae809aa4923555. - Observed 2026-10-17 23:55:00 UTC, captured 2026-10-18 00:15:08.772Z; source body SHA-256
2e4c6ad295ac837c980c59790d7a701d3f94b395e669ad24a6f5d6eeb1bc7aaa. - Observed 2026-10-18 00:15:00 UTC, captured 2026-10-18 00:30:06.852Z; source body SHA-256
8e3fb2d104d62ee584c29d18a0e33a08276c0c1b45eec979cb7f087bdef2f712. - Observed 2026-10-18 00:35:00 UTC, captured 2026-10-18 01:00:10.019Z; source body SHA-256
949eb463d93270208adccd66994771bf859674b804d78a93f2b1e78571af9b73. - Observed 2026-10-18 01:15:00 UTC, captured 2026-10-18 01:30:08.633Z; source body SHA-256
848e769c04c496475a4a56da164c43dc2da3091dec76864a121c5df6639d5e1a. - Observed 2026-10-18 05:15:00 UTC, captured 2026-10-18 05:30:07.030Z; source body SHA-256
846c18882078fc94390c507105ede603df0a14abac3dfdc9e7f73c6b87a50126. - Observed 2026-10-18 05:35:00 UTC, captured 2026-10-18 05:45:07.433Z; source body SHA-256
0768cb322d2c5bf6958ddb7ce2a53d243bd969b5fea1047d24b71a6a5b41a886. - Observed 2026-10-18 06:15:00 UTC, captured 2026-10-18 06:30:07.583Z; source body SHA-256
9ab6462e67c4eb5bc9bba4861248e2cbbd9c65288df1942a8f6764fe2c578731. - Observed 2026-10-18 06:35:00 UTC, captured 2026-10-18 06:45:08.757Z; source body SHA-256
d4711d6703b86d9ea514fec4b95bcb3555271ef53e955aeb3ccf01ed7e9bb620. - Observed 2026-10-18 07:15:00 UTC, captured 2026-10-18 07:30:06.796Z; source body SHA-256
74b102d64c1c868841354fbe7a693afba78dbac9ebb7f03d8570e756b2c2130f. - Observed 2026-10-18 07:35:00 UTC, captured 2026-10-18 07:45:08.639Z; source body SHA-256
9a7c7093b2467d1caafe5fbf37862b14188b33d6d26d7dd98ffea259aca6468d. - Observed 2026-10-18 07:55:00 UTC, captured 2026-10-18 08:00:11.468Z; source body SHA-256
53a01ad60670349facf980ea22602bd1fb21ffca3c40d501342bfb23f8e22c0b. - Observed 2026-10-18 08:15:00 UTC, captured 2026-10-18 08:30:07.963Z; source body SHA-256
abda48cfec1b2ae69e44a795568c94dd13b85c9cda6ffbd700d6cc1ad8e661af. - Observed 2026-10-18 08:55:00 UTC, captured 2026-10-18 09:00:09.520Z; source body SHA-256
8ad9748657ec506ad6f6e8aeac27fa8611b3416e28598e978a06c642e3ba8df5. - Observed 2026-10-18 09:15:00 UTC, captured 2026-10-18 09:30:07.695Z; source body SHA-256
a58900ae1657c840a58570bc15d806cba8e5821b7206d1f20bbfe60247d2272e. - Observed 2026-10-18 09:55:00 UTC, captured 2026-10-18 10:00:08.135Z; source body SHA-256
7088f7a20b608392c60688c0c6cc24bb874f518a9d855a8f279a1656aa963b5f.
Values use the decoded station report. Null means not reported, never zero. Gust is kept separate from sustained wind.
Observation source page · Cached readings as JSON · Official source
Recent source changes
- mesoanalysis · source-revision · Recorded 2026-10-18T11:15:08.982Z
- hrrr · source-revision · Recorded 2026-10-18T11:15:08.982Z
- metars · source-revision · Recorded 2026-10-18T11:15:08.982Z
- office-afd · source-revision · Recorded 2026-10-18T11:15:08.056Z
- office-hwo · source-revision · Recorded 2026-10-18T11:15:08.056Z
- office-afd · source-revision · Recorded 2026-10-18T11:10:05.890Z
- gauge-details · source-revision · Recorded 2026-10-18T11:05:05.707Z
- gauges-observed · source-revision · Recorded 2026-10-18T11:05:05.707Z
Recording coverage and limits
- warnings: retained from 2026-10-17T11:17:36.335Z through 2026-10-18T11:17:04.064Z
- outlooks: retained from 2026-10-17T11:17:36.335Z through 2026-10-18T11:15:08.056Z
- hydro: retained from 2026-10-17T11:17:36.335Z through 2026-10-18T11:15:06.424Z
- analysis: retained from 2026-10-17T11:17:36.335Z through 2026-10-18T11:15:08.982Z
- winter: retained from 2026-10-17T11:17:36.335Z through 2026-10-18T11:08:05.317Z
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 4River 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.
Data: NOAA/WPC, NOAA/NSSL MRMS.
Radar
NOAA’s radar for the area, loaded by your browser as on the Radar page.
Live tiles; the radar keeps no last-good copy.
What changed, last 60 minutes
since , when this server began watching this areaNothing has changed since 11:11Z.
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
NWS warnings and SPC watches checked
NWS watches and advisories checked
WPC excessive rainfall checked
NWPS river gauges checked
Radar live tiles, no last-good copy
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.