Alert archive / California / Flash Flood Warnings in 1986

Flash Flood Warning 16, NWS Sacramento, CA

February 17, 1986Plumas County, California

NWS Sacramento, CA issued this flash flood warning at Feb 17, 1986, 6:30 PM PST for Plumas County, California. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Feb 17, 1986, 6:30 PM PST (02:30 UTC)
Expired
Feb 18, 1986, 6:00 AM PST
In force
12 hr
Issued by
NWS Sacramento, CA
Area
Whole counties

County Plumas County, CA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Winnemucca Muni, NV (KWMC), launched 00:00Z, 2.5 hours before the alert went out and 276 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.

Skew-T log-pSkew-T log-p diagram, Winnemucca Muni, NV at 00:00Z on 1986-02-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Winnemucca Muni, NV at 00:00Z on 1986-02-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
255 m²/s²
0-3 km storm-relative helicity
510 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Feb 17, 2:10 PM PST, 4 hours 20 minutes before
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The office that day

Everything else NWS Sacramento, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 17, 5:00 PM PSTFlash Flood WarningSTOTehama7 hr
Feb 17, 8:30 PM PSTFlash Flood WarningSTONevada, Sierra, Yuba13 hr
Feb 17, 8:30 PM PSTFlash Flood WarningSTOAmador, Calaveras, Sacramento, San Joaquin, Stanislaus13 hr
Feb 17, 8:30 PM PSTFlash Flood WarningSTOAlpine, El Dorado, Placer13 hr
Feb 17, 8:30 PM PSTFlash Flood WarningSTOTuolumne13 hr
Feb 17, 8:30 PM PSTFlash Flood WarningSTOSolano, Yolo13 hr
Feb 17, 8:30 PM PSTFlash Flood WarningSTOColusa, Sutter13 hr
Feb 17, 9:00 PM PSTFlash Flood WarningSTOShasta, Tehama, Trinity12 hr
Feb 17, 9:00 PM PSTFlash Flood WarningSTOButte, Glenn12 hr
Feb 17, 9:00 PM PSTFlash Flood WarningSTOLassen, Plumas12 hr
Feb 18, 9:00 AM PSTFlash Flood WarningSTOColusa, Placer, Sacramento, Sutter, Yolo, Yuba9 hr
Feb 18, 9:00 AM PSTFlash Flood WarningSTOAlpine, Amador, Calaveras, El Dorado, San Joaquin9 hr
Feb 18, 9:00 AM PSTFlash Flood WarningSTOStanislaus, Tuolumne9 hr
Feb 18, 9:00 AM PSTFlash Flood WarningSTONevada, Plumas, Sierra9 hr
Feb 18, 9:00 AM PSTFlash Flood WarningSTOSolano9 hr

Nearby

Flash Flood Warnings in California, 1986Every flash flood warning in 1986

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.