Alert archive / California / Flash Flood Warnings in 1998

Flash Flood Warning 2, NWS Medford, OR

June 7, 1998Siskiyou County, California

NWS Medford, OR issued this flash flood warning at Jun 7, 1998, 5:48 PM PDT for Siskiyou County, California. It was in force for 4 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
Jun 7, 1998, 5:48 PM PDT (00:48 UTC)
Expired
Jun 7, 1998, 9:50 PM PDT
In force
4 hr
Issued by
NWS Medford, OR
Area
Whole counties

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 00:50 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

Medford/Jackson, OR (KMFR), launched 00:00Z, 0.8 hours before the alert went out and 89 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, Medford/Jackson, OR at 00:00Z on 1998-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 joules per kilogram.LCLLFCEL10008507005003002001001 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, Medford/Jackson, OR at 00:00Z on 1998-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -54 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
46 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1973 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-54 m²/s²
0-3 km storm-relative helicity
-23 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMFR 080048
FFWMFR
CAC093-080450-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
548 PM PDT SUN JUN 7 1998

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL SISKIYOU COUNTY IN NORTH CENTRAL CALIFORNIA

* UNTIL 950 PM PDT

* AT 545 PM PDT... SPOTTERS INDICATED A THUNDERSTORM WITH VERY HEAVY
  RAIN CENTRAL SISKIYOU COUNTY... MOVING SLOWLY SOUTHEAST.

* OFFICIALS IN YREKA REPORT THAT HEAVY RAINS RESULTING FROM
  THUNDERSTORMS HAVE FLOODED SOME ROADS IN THE YREKA VICINITY. OTHER
  AREAS IN CENTRAL SISKIYOU COUNTY MAY BE FLOODING AS WELL. DON'T
  DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN
  AUTOMOBILES.D

CRAWFORD

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; radar from the NEXRAD Level II archive.