Alert archive / California / Flash Flood Warnings in 1997

Flash Flood Warning 6, NWS Sacramento, CA

January 5, 1997San Joaquin County, California

NWS Sacramento, CA issued this flash flood warning at Jan 5, 1997, 2:01 PM PST for San Joaquin County, California. It was in force for 69 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 5, 1997, 2:01 PM PST (22:01 UTC)
Expired: Jan 5, 1997, 3:10 PM PST
In force: 69 min
Issued by: NWS Sacramento, CA
Area: Whole counties

County San Joaquin County, CA

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 10.0 hours before the alert went out and 85 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 5 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 523 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAC 052208
FFWSAC
CAC077-052310-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
201 PM PST SUN JAN 05 1997

THE NATIONAL WEATHER SERVICE IN SACRAMENTO CA HAS ISSUED A FLASH
FLOOD WARNING EFFECTIVE UNTIL 310 PM PST FOR PEOPLE IN THE FOLLOWING
LOCATIONS...

IN CENTRAL CALIFORNIA

  ...SOUTHWESTERN SAN JOAQUIN COUNTY



<
...LEVEE BREAK ON SOUTH BANK PARADISE CUT...

AT 140 PM DISTRICT PERSONEL REPORTED A LEVEE BREAK ALONG THE SOUTH
BANK OF PARADISE CUT...ONE QUARTER MILE EAST OF THE UNION PACIFIC
RAILROAD TRACKS. THIS BREAK IS ON THE SOUTH BANK LEVEE. THIS BREAK
MAY AFFECT RESIDENTS IN THE VICINITY OF KASSON ROAD AND LORENZEN
ROAD. 

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.

EGGER/MATHEWS

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.

NWS Sacramento, CA wrote its last area forecast discussion before this flash flood warning went out at Jan 5, 9:19 AM PST, 4 hours 42 minutes earlier.

Area forecast discussion, Jan 5, 9:19 AM PST, 4 hours 42 minutes before

AREA FORECAST DISCUSSION...UPDATED TO REMOVE RIVERS AT FLD LEVEL...
NATIONAL WEATHER SERVICE SACRAMENTO CA
915 AM SUN JAN 5 1997

NO ECHOS REMAIN THIS MORNING ON THE RADAR WITH FOG RESTRICTED TO JUST
THE EASTERN SIDE OF VALLEY AGAINST THE FOOTHILLS. FOG IS SHALLOW SO
WILL NOT TAKE LONG TO DISSIPATE.  NO CHANGES TO PACKAGE REQUIRED AS
WEAK VORT MAX DROPPING SOUTH OUT OF OREGON IS LOSING ITS STEAM. ONLY
A FEW SHOWERS POSSIBLE ON THE SIERRA CREST WITH NO ACCUMULATION
EXPECTED. HIGH PRESSURE FORECAST TO BUILD INTO PACNW BRINGING BREEZY
NLY FLOW OVER THE VALLEY BY MONDAY.  THIS WILL KEEP FOG FROM FORMING
THRU TUESDAY. EGGER

.SAC...FF WATCH THROUGH TNGT FOR SOUTHERN SAN JOAQUIN CNTY AND
    SOUTHWESTERN SUTTER CNTY
    ...SMALL RIVER AND STREAM FLOOD WRNG...THRU MON...ZN19
    ...FLOOD WARNING TDY...SACRAMENTO...SAN JOAQUIN...
    CONSUMNES...MOKELUMNE...TOULUMNE RIVERS

BLU EB 034/026 038/031 041 763-0
RBL AU 053/035 055/036 056 764000
SAC AU 056/038 057/039 058 76000

In the hours before

Special weather statement, Jan 5, 10:49 AM PST, 3 hours 12 minutes before

CAZ016>019-060300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
1045 AM PST SUN JAN 5 1997

...GUSTY WINDS MAY IMPACT LEVEES IN HIGH WATER AREAS TODAY...

NORTHERLY WINDS ARE EXPECTED TO INCREASE TODAY PUTTING ADDED STRESS
ON LEVEES IN HIGH WATER AREAS OF THE CENTRAL VALLEY AND DELTA
REGION.

THE NORTHERLY WINDS ARE EXPECTED TO GUSTS TO AROUND 25 MPH DURING
THE AFTERNOON AND EVENING WITH THE RESULTING WAVE ACTION INCREASING
THE POTENTIAL OF LEVEE FAILURE.

PERSONS LIVING IN FLOOD THREATENED AREAS OF THE SOUTHERN SACRAMENTO
AND NORTHERN SAN JOAQUIN VALLEYS AS WELL AS THE DELTA REGION SHOULD
CLOSELY MONITOR THE SITUATION.

BREEZY CONDITIONS ARE EXPECTED TO CONTINUE IN0TO MONDAY WITH THE
POTENTIAL OF 35 MPH WIND GUSTS.

SWANBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 4, 6:49 PM PST	Flash Flood Warning	STO	Sutter	91 min
Jan 4, 9:50 PM PST	Flash Flood Warning	STO	Sutter	5 hr

Nearby

Flash Flood Warnings in California, 1997 Every flash flood warning in 1997

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.