Alert archive / California / Flash Flood Warnings in 1998

Flash Flood Warning 6, NWS Phoenix, AZ

July 22, 1998Riverside County, California

NWS Phoenix, AZ issued this flash flood warning at Jul 22, 1998, 8:05 PM PDT for Riverside County, California. It was in force for 2 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
Jul 22, 1998, 8:05 PM PDT (03:05 UTC)
Expired
Jul 22, 1998, 10:05 PM PDT
In force
2 hr
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Riverside County, CA

The nearest sounding before it

San Diego, CA (KNKX), launched 00:00Z, 3.1 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 00:00Z on 1998-07-23Temperature 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 00:00Z on 1998-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 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
1102 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
78 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 KPHX 230306
FFWPHX
CAC065-230505-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
805 PM MST (805 PM PDT) WED JUL 22 1998


THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

*  FLASH FLOOD WARNING FOR:
   NORTH CENTRAL RIVERSIDE COUNTY IN SOUTHEASTERN CALIFORNIA

*  UNTIL 1005 PM PDT (1005 PM MST)

*  AT 8 PM PDT DOPPLER RADAR ESTIMATED RAINFALL RATES OF 1 TO 2
   INCHES PER HOUR OVER THE CENTRAL PART OF JOSHUA TREE NATIONAL
   PARK. FLOODING IS OCCURRING OR IS IMMINENT IN THE WARNING
   AREA.

*  SOME LOCATIONS AFFECTED INCLUDE:
    JOSHUA TREE NATIONAL PARK...ESPECIALLY AROUND CAP ROCK AND RYAN

MOTORISTS AND CAMPERS ARE URGE TO MOVE TO HIGHER GROUND IF FLOODING
IS ENCOUNTERED.  FLOODING IS VERY DIFFICULT TO SEE AT NIGHT.

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 2:09 PM PDTFlash Flood WarningPSRRiverside2 hr

Nearby

Flash Flood Warnings in California, 1998Every flash flood warning in 1998

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.