Pilot Index / California / Dec 20, 2017

Preliminary

Storms in California on Dec 20, 2017

15 published severe reports across California on Dec 20, 2017.

Updated Oct 28, 2026.

Coverage is partial. 473 source scopes are pending. Pending data is not a zero report count.

Hail reports: 0. Wind reports: 15. Tornado reports: 0.

The table and map show 15 of 15 reports.

TimeWhatSize or SpeedWhereDetails
Dec 20, 2017, 12:35 AM PSTWind63 mph6 E MAMMOTH LAKES
Record
  • Dec 20, 2017, 12:35 AM PST. Wind, 63 mph, 6 E MAMMOTH LAKES. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:d922e24478d3091a51fa82c20f7b370406cdb8cfb4f7e5686977db863f606420.
Dec 20, 2017, 1:30 AM PSTWind65 mph5 SSE SIERRAVILLE
Record
  • Dec 20, 2017, 1:30 AM PST. Wind, 65 mph, 5 SSE SIERRAVILLE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:54eaeb0da29d12a8af217656bd596efbc7ef3c76ffd0dfdd8afbffc892750a84.
Dec 20, 2017, 4:33 AM PSTWind61 mph4 WNW TRUCKEE
Record
  • Dec 20, 2017, 4:33 AM PST. Wind, 61 mph, 4 WNW TRUCKEE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:c4123b86e914ef2b4080f30bd44189e4ddc0da4b9190df1ba20e139e9ebe2b2b.
Dec 20, 2017, 4:54 AM PSTWind71 mph3 SE ROUND VALLEY
Record
  • Dec 20, 2017, 4:54 AM PST. Wind, 71 mph, 3 SE ROUND VALLEY. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:745f4b0291c28b2158a69734410b188ae9f5c435370d52147a5c2f7c5ff1de89.
Dec 20, 2017, 5:04 AM PSTWind60 mph1 ESE TOMS PLACE
Record
  • Dec 20, 2017, 5:04 AM PST. Wind, 60 mph, 1 ESE TOMS PLACE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:677282016e95da39823c3de8f0c1a58730d709471066893a700a1652c2420e27.
Dec 20, 2017, 1:26 PM PSTWind61 mph19 S HAIWEE
Record
  • Dec 20, 2017, 1:26 PM PST. Wind, 61 mph, 19 S HAIWEE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:8166dfe60096851f9d07e3ee6ec738bf689a4f2552708978beb8b20317e0fd0d.
Dec 20, 2017, 1:52 PM PSTWind59 mph2 ENE BISHOP
Record
  • Dec 20, 2017, 1:52 PM PST. Wind, 59 mph, 2 ENE BISHOP. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:bd154da4d912a80b1109b626249094f47f103907e53dd3916737da2a4f9cf323.
Dec 20, 2017, 3:51 PM PSTWind64 mph25 SE SHOSHONE
Record
  • Dec 20, 2017, 3:51 PM PST. Wind, 64 mph, 25 SE SHOSHONE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:b955b69c390ce6d186b64dd8ea4d2615d226c8dded4d1f899650c7b93f23b4f3.
Dec 20, 2017, 4:51 PM PSTWind110 mph13 ESE BIG BEAR CITY
Record
  • Dec 20, 2017, 4:51 PM PST. Wind, 110 mph, 13 ESE BIG BEAR CITY. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:f4be90913aa1b844e7b712af11fa0dbc1917914b5931f7b2abf7176dda8a46b2.
Dec 20, 2017, 5:30 PM PSTWind69 mph2 NNE JULIAN
Record
  • Dec 20, 2017, 5:30 PM PST. Wind, 69 mph, 2 NNE JULIAN. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:8a8810dc2108a4b032aef3d40bad973ecba4fa2fe6c1f5da00e18141e430ec44.
Dec 20, 2017, 6:20 PM PSTWind61 mph3 SSE JULIAN
Record
  • Dec 20, 2017, 6:20 PM PST. Wind, 61 mph, 3 SSE JULIAN. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:68edea640f7dd111cac3a3998d1b65752e7924518f2c898d985af75389618067.
Dec 20, 2017, 7:50 PM PSTWind72 mph7 ENE CABAZON
Record
  • Dec 20, 2017, 7:50 PM PST. Wind, 72 mph, 7 ENE CABAZON. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:c656c7bd16d718d7c7f23d8901dbade235b4382584c08e6b24e98932383d4e43.
Dec 20, 2017, 9:56 PM PSTWind60 mph8 SSW WOODLAND HILLS
Record
  • Dec 20, 2017, 9:56 PM PST. Wind, 60 mph, 8 SSW WOODLAND HILLS. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:177feec8a219e886c97c2dd5b38249dcdbb29aa46c8356e3ebfc362210817ed9.
Dec 20, 2017, 9:57 PM PSTWind70 mph6 SSW CASTAIC LAKE
Record
  • Dec 20, 2017, 9:57 PM PST. Wind, 70 mph, 6 SSW CASTAIC LAKE. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:eb2d5890eae6ff69d62eedbe164a825f12ba17d186241f002dd28bd44fff6a26.
Dec 20, 2017, 11:15 PM PSTWind58 mph4 ENE POINT ARGUELLO
Record
  • Dec 20, 2017, 11:15 PM PST. Wind, 58 mph, 4 ENE POINT ARGUELLO. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:77a50b6da02b76ad89ea3e56099c97f16d4a9783be7cba34e19142fe32d7cd83.
How We Count

This page uses published ground reports from 2016-01-01 through 2026-10-29. Coverage is partial. 473 source scopes are pending. Pending data is not a zero report count.

Hail counts at 1.00 in or larger. Wind counts at 58 mph or stronger. State days also include tornado reports.

Reports use the local civil date and clock. City pages use the city clock. State pages use each report location clock.

Exact repeated observations are counted once. Nearby reports with different times, coordinates or sizes remain separate observations.

NCEI rows are verified against NCEI Storm Events. SPC and NWS local reports are preliminary.

Radar signatures and warning polygons are not ground reports and are not in these counts.

A missing report does not show that no storm occurred. These pages show city or state exposure, not damage at an address.

This free page covers the state. It does not check a street address.

Limits

This page is not a certified record.

This page shows weather exposure, not damage or cause.

This page is not an expert opinion and it is not a meteorologist review.

Verify these rows with official NOAA and NWS records.

VectorWX is not affiliated with or endorsed by NOAA or NWS.

Radar-estimated hail size comes from MRMS MESH or NCEI nx3hail. It is an estimate of hail aloft. It is not a measurement of hail on a roof.