Alert archive / California / Flash Flood Warnings in 1990
Flash Flood Warning 22, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Sep 22, 1990, 5:37 PM PDT for San Luis Obispo County, Santa Barbara County, California. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Sep 22, 1990, 5:37 PM PDT (00:37 UTC)
- Expired
- Sep 22, 1990, 7:45 PM PDT
- In force
- 2 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Whole counties
Counties San Luis Obispo County, CA, Santa Barbara 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
Vandenberg AFB, CA (KVBG), launched 00:00Z, 0.6 hours before the alert went out and 35 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.
- Mixed-layer CAPE
- 854 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSMX 230037 RRA FFWSMX CAC079-083-230245- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SANTA MARIA CA 537 PM PDT SAT SEP 22 1990 THE NATIONAL WEATHER SERVICE IN SANTA MARIA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 745 PM PDT FOR THE FOLLOWING... IN WEST CENTRAL CALIFORNIA ...EASTERN SAN LUIS OBISPO COUNTY AND ...NORTHEASTERN SANTA BARBARA COUNTY FLOODING CONTINUES IN THE UPPER SECTIONS OF THE CUYAMA VALLEY...17 MILES WEST OF NEW CUYAMA...OF NORTHEASTERN SANTA BARBARA COUNTY. IN ADDITION...FLOODING CONTINUES ALONG THE CARRIZZO PLAIN IN THE TOWN OF CALIFORNIA VALLEY...OF EASTERN SAN LUIS OBISPO COUNTY. BOTH HIGHWAYS 58 AND 166 ARE CLOSED DUE TO THE FLOODING AS LIGHT RAIN CONTINUES IN THE AREA. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREMAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. NNNN
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, Sep 22, 1:03 PM PDT, 4 hours 34 minutes before
CAZ003-04-222200 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SANTA MARIA CA 1255 PM PDT SAT SEP 22 1990 ...THUNDERSTORMS ACROSS PARTS OF CENTRAL SANTA BARBARA COUNTY WITH MORE ON THE WAY FOR THE REST OF THE COUNTY... AT 1245 PM...REMOTE WEATHER SENSORS IN THE SAN RAFAEL MOUNTAINS INDICATED LIGHT TO MODERATE RAINFALL FROM THUNDERSTORMS DURING THE LAST HOUR. THE BATES RIDGE SENSOR REPORTED 0.16 INCHES IN THE LAST HOUR AND 0.28 INCHES SINCE 10 AM. THIS IS ALL IN ADDITION TO THE 1 TO 2 INCHES OF RAIN REPORTED LAST EVENING. THESE THUNDERSTORMS WILL CONTINUE OVER THE SAN RAFAEL MOUNTAINS THIS AFTERNOON WITH ADDITIONAL RAINFALL EXPECTED...SOME OF WHICH MAY BE HEAVY. MOVEMENT WAS VERY SLOWLY TO THE NORTH. ALL PERSONS IN OR PLANNING TO TRAVEL IN THE BACK COUNTRY OF SANTA BARBARA COUNTY THIS AFTERNOON OR EVENING SHOULD BE ALERT FOR POSSIBLE WASHED OUT ROADWAYS OR TRAILS IN RAVINES AND CANYONS. IN ADDITION ...THESE STORMS MAY CONTAIN DANGEROUS LIGHTNING. IF THREATENED...SEEK SOME SORT OF SAFE SHELTER IMMEDIATELY. RADAR AND SATELLITE DATA INDICATE THE PRESENT THUNDERSTORM ACTIVITY WILL BECOME MORE NUMEROUS ACROSS THE COUNTY AS THE DAY GOES ON. ALL CONCERNED PERSONS IN SANTLA BARBARA COUNTY SHOULD STAY ABREAST OF THE LASTEST WEATHER CONDITIONS AND LISTEN OR FURTHER STATEMENTS ON THIS SITUATION. TRM
Special weather statement, Sep 22, 2:35 PM PDT, 3 hours 2 minutes before
CAZ003-04-222300 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SANTA MARIA CA 230 PM PDT SAT SEP 22 1990 ...FLASH FLOOD WATCH FOR NORTHERN SANTA BARBARA COUNTY AND SAN LUIS OBISPO COUNTY UNTIL 9 PM PDT... A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHERN SANTA BARBARA COUNTY ...NORTH OF THE SANTA YNEZ RANGE...AND ALL OF SAN LUIS OBISPO COUNTY UNTIL 9 PM PDT. AT 200 PM PDT...WEATHER RADAR AND SATELLITE DATA SHOWED THUNDERSTORMS BLOSSOMING OVER MUCH OF SANTA BARBARA COUNTY AND SAN LUIS OBISPO COUNTY. THE STRONGEST ACTIVITY WAS OVER PARTS OF CENTRAL SAN LUIS OBISPO COUNTY NORTH OF SAN LUIS OBISPO TO NEAR PASO ROBLES. SATELLITE ESTIMATES OF POTENTIAL RAINFALL RATES INDICATED AS MUCH AS 1 INCH PER HOUR MAY BE FALLING FROM THESE STORMS. OTHER STRONG THUNDERSTORMS WERE OVER PORTIONS OF EASTERN SANTA BARBARA COUNTY...INCLUDING THE ADJACENT COASTAL WATERS. MOVEMENT WAS TO THE NORTH AT 15 MILES AN HOUR. PERSONS LIVING IN THE WATCH AREA...ESPECIALLY BETWEEN SAN LUIS OBISPO AND PASO ROBLES...SHOULD BE PREPARED FOR POSSIBLE HEAVY RAINS AND SUBSEQUENT FLASH FLOODING. SEEK HIGHER GROUND IF FLOODING DOES OCCUR. TRM
Nearby
Flash Flood Warnings in California, 1990Every flash flood warning in 1990
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.