Alert archive / California / Flash Flood Warnings in 1996
Flash Flood Warning 8, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Sep 4, 1996, 8:30 PM PDT for Riverside County, California. It was in force for 60 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
- Sep 4, 1996, 8:30 PM PDT (03:30 UTC)
- Expired
- Sep 4, 1996, 9:30 PM PDT
- In force
- 60 min
- Issued by
- NWS Los Angeles, CA
- Area
- Whole counties
County Riverside County, CA
The radar
The San Diego radar (KNKX), 134 km from the middle of the area, began a volume at 03:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 3.5 hours before the alert went out and 154 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2043 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Sep 4, 3:58 PM PDT, 4 hours 32 minutes before
CAZ013-018-019-050200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OXNARD CA 400 PM PDT WED SEP 4 1996 ...THUNDERSTORMS INCREASING ACROSS THE MOUNTAINS AND DESERTS OF SOUTHERN CALIFORNIA... AT 355 PM DOPPLER RADARS...SATELLITE IMAGERY...AND LIGHTNING DETECTION CHARTS INDICATED INCREASING THUNDERSTORM ACTIVITY ACROSS THE MOUNTAINS AND DESERTS OF SOUTHERN CALIFORNIA. THUNDERSTORNS WERE BEING DETECTED OVER THE SANTA ROSA MOUNTAINS AND THE DESERTS OF RIVERSIDE COUNTY. THESE STORMS WERE NEARLY STATIONARY. SOME OF THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING BRIEF HEAVY RAIN...STRONG WINDS...HAIL...AND FREQUENT LIGHTNING. BE PREPARED TO TAKE SHELTER IF A DANGEROUS STORM APPROACHES. THUNDERSTORM ACTIVITY IS EXPECTED TO DECREASE AT AROUND SUNSET. GOMBERG
Special weather statement, Sep 4, 6:38 PM PDT, 1 hour 52 minutes before
CAZ018-050400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OXNARD CA 640 PM PDT WED SEP 4 1996 ...ISOLATED THUNDERSTORMS OVER DESERTS OF RIVERSIDE COUNTY... AT 630 PM DOPPLER RADARS AND SATELLITE IMAGERY INDICATED ISOLATED THUNDERSTORM ACTIVITY ACROSS THE DESERTS OF RIVERSIDE COUNTY. THE STRONGEST STORM WAS LOCATED OVER RICE VALLEY... JUST SOUTH OF RICE. STORMS WILL CONTINUE TO PRODUCE BRIEF HEAVY RAIN...GUSTY WINDS...AND FREQUENT LIHGHTNING. THUNDERSTORMS ARE EXPECTED TO DIMINISH AFTER SUNSET. GOMBERG
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 6:55 PM PDT | Flash Flood Warning | LOX | Riverside | 50 min |
| Sep 4, 6:55 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 50 min |
| Sep 4, 7:45 PM PDT | Flash Flood Warning | LOX | Riverside | 45 min |
| Sep 4, 7:45 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 45 min |
| Sep 4, 8:30 PM PDT | Severe Thunderstorm Warning | LOX | Riverside | 60 min |
| Sep 4, 9:40 PM PDT | Flash Flood Warning | LOX | Riverside | 50 min |
Nearby
Flash Flood Warnings in California, 1996Every flash flood warning in 1996
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; radar from the NEXRAD Level II archive.