Alert archive / California / Flash Flood Warnings in 2000

Flash Flood Warning 13, NWS Phoenix, AZ

August 29, 2000Riverside County, California

NWS Phoenix, AZ issued this flash flood warning at Aug 29, 2000, 1:49 PM PDT for Riverside County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 29, 2000, 1:49 PM PDT (20:49 UTC)
Expired
Aug 29, 2000, 4:20 PM PDT
In force
3 hr
Issued by
NWS Phoenix, AZ
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 20:50 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 12:00Z, 8.8 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2000-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2000-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
45 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 
WGUS55 KPSR 292049
FFWPSR
CAC065-292320-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
151 PM MST (151 PM PDT) TUE AUG 29 2000

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE JOSHUA TREE NATIONAL PARK AREA OF NORTH CENTRAL RIVERSIDE
  COUNTY IN SOUTHEASTERN CALIFORNIA

* UNTIL 420 PM PDT (420 PM MST)

* AT 145 PM PDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS...WITH VERY HEAVY RAIN...OVER JOSHUA TREE NATIONAL
  PARK...MOVING NORTHWEST AT 5 MPH.

* THUNDERSTORMS...AND HEAVY RAIN WILL CONINUE OVER OVER JOSHUA TREE
  NATIONAL PARK THROUGH 330 PM.  RUNOFF FROM THESE STORMS WILL LIKELY
  CAUSE FLASH FLOODING OF NORMALLY DRY CREEKS AND WASHES.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

$$
MB

Nearby

Flash Flood Warnings in California, 2000Every flash flood warning in 2000

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.