Alert archive / California / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Medford, OR

July 22, 1998Siskiyou County, California

NWS Medford, OR issued this flash flood warning at Jul 22, 1998, 4:08 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
Jul 22, 1998, 4:08 PM PDT (23:08 UTC)
Expired
Jul 22, 1998, 8:05 PM PDT
In force
4 hr
Issued by
NWS Medford, OR
Area
Whole counties

County Siskiyou County, CA

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 11.1 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 12:00Z on 1998-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 12:00Z on 1998-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
40 J/kg
Mixed-layer CIN
-582 J/kg
Mixed-layer LCL
1516 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
24 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 KMFR 222314
FFWMFR
CAC093-230305-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
408 PM PDT WED JUL 22 1998

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A

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

* UNTIL 805 PM PDT

* AT 410 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAIN 10 MILES EAST OF ETNA OR 15
  MILES WEST OF WEED. THE STORM WAS NEARLY STATIONARY.

* RADAR INDICATES VERY HEAVY RAIN FALLING ON THE HEADWATERS OF THE
EAST FORK OF THE SCOTT RIVER AND MOFFETT CREEK. FLOODING
IS LIKELY ON THE HEADWATERS OF THE EAST FORK OF THE SCOTT RIVER.


IF FLOOD WATERS| THREATEN...MOVE TO HIGHER GROUND!



AF

The office that day

Everything else NWS Medford, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 3:42 PM PDTSevere Thunderstorm WarningMFRSiskiyou58 min
Jul 22, 4:36 PM PDTSevere Thunderstorm WarningMFRSiskiyou59 min

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.