Alert archive / Oregon / Flash Flood Warnings in 1997

Flash Flood Warning 3, NWS Medford, OR

August 1, 1997Klamath County, Oregon

NWS Medford, OR issued this flash flood warning at Aug 1, 1997, 6:51 PM PDT for Klamath County, Oregon. It was in force for 94 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
Aug 1, 1997, 6:51 PM PDT (01:51 UTC)
Expired
Aug 1, 1997, 8:25 PM PDT
In force
94 min
Issued by
NWS Medford, OR
Area
Whole counties

County Klamath County, OR

The radar

The Medford radar (KMAX), 110 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 101 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 1997-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 884 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 1997-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
884 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
2238 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMFR 020212
FFWMFR
ORC035-020325-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
651 PM PDT FRI AUG 1 1997

THE NATIONAL WEATHER SERVICE IN MEDFORD OR HAS ISSUED A FLASH FLOOD
WARNING EFFECTIVE UNTIL 825 PM PDT FOR PEOPLE IN THE FOLLOWING
LOCATIONS...

IN SOUTH CENTRAL OREGON

  ...NORTHERN KLAMATH COUNTY

AN AREA OF STRONG THUNDERSTORMS HAS REMAINED NEARLY STATIONARY OVER
EXTREME NORTHERN KLAMATH COUNTY BETWEEN CHEMULT AND CRESCENT LAKE FOR
THE PAST TWO HOURS.  RAINFALL ESTIMATES OF TWO TO THREE INCHES HAVE
FALLEN IN THIS AREA.  AT 645 PM HIGHWAY PATROL IN THIS AREA REPORTED
VERY HEAVY RAIN CONTINUING WITH FAST FLOWING WATER ALONG THE SIDES OF
HIGHWAY 58. PERpSONS LIVING OR TRAVELING IN THIS AREA SHOULD BE ALERT
FOR WATER FLOWING ACROSS PORTIONS OF HIGHWAY 58. IN ADDITION...SMALL
CREEKS OR STREAMS MAY BE RUNNING OVER BANKFUL.  

HOLTZ

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 5:41 PM PDTSevere Thunderstorm WarningMFRJackson34 min

Nearby

Flash Flood Warnings in Oregon, 1997Every flash flood warning in 1997

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.