Alert archive / California / Flash Flood Warnings in 1997

Flash Flood Warning 2, NWS Medford, OR

July 26, 1997Siskiyou County, California

NWS Medford, OR issued this flash flood warning at Jul 26, 1997, 6:58 PM PDT for Siskiyou County, California. It was in force for 92 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: Jul 26, 1997, 6:58 PM PDT (01:58 UTC)
Expired: Jul 26, 1997, 8:30 PM PDT
In force: 92 min
Issued by: NWS Medford, OR
Area: Whole counties

County Siskiyou County, CA

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 00:00Z, 2.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 24 J/kg
Mixed-layer CIN: -357 J/kg
Mixed-layer LCL: 2883 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 52 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 270200
FFWMFR
CAC093-270320-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
658 PM PDT SAT JUL 26 1997

THE NATIONAL WEATHER SERVICE IN MEDFORD OR HAS ISSUED A SEVERE
THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 830 PM PDT FOR
PEOPLE IN THE FOLLOWING LOCATIONS...

IN NORTH CENTRAL CALIFORNIA

  ...SOUTH CENTRAL SISKIYOU COUNTY

AT 655 PM...RADAR INDICATES TWO SEVERE THUNDERSTORMS. ONE WAS LOCATED
2 MILES SOUTHWEST OF ETNA THE OTHER OVER CECIVILLE IN EXTREME SOUTH
CENTRAL SISKIYOU COUNTY. LARGE HAIL UP TO 1 INCH AND TORRENTIAL RAIN
ARE LIKELY WITH THESE STORMS.

DUE TO THE SLOW MOVEMENT OF THESE STORMS FLOODING ALONG SMALL S,TREAMS
AND DRAINAGES WILL BE POSSIBLE. IF YOU LIVE IN A NARROW CANYON AND/OR
NEAR A SMALL STREAM AND ARE NEAR THESE STORMS...BE ALERT FOR RISING
WATER. 

BE PREPARED TO MOVE TO HIGHER GROUND.

FOSTER

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Medford, OR wrote its last area forecast discussion before this flash flood warning went out at Jul 26, 2:30 PM PDT, 4 hours 28 minutes earlier.

Area forecast discussion, Jul 26, 2:30 PM PDT, 4 hours 28 minutes before

SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
230 PM PDT SAT JUL 26 1997

THERML TROF REMAINS ORIENTD OFF THE XTRM NRN CA CST THIS AFTN DRIVG
THE N-NE FLOW ACRS THE AREA. MDLS SHOW THIS FEATR WEAKENG SO MAY GET
SOME CLDS ALG S CST. TROF WL MOVE INLND ON SUN...SO TEMPS WL BE
SIMILR IN WRN VLYS AND WARMR E OF CASCDS. CONVCTN STARTG TO FIRE UP A
LTL EARLIER TDY CASCDS EWD AND IN NRN CA...MOST IMPRESSV DVLPMNT ATTM
JUST S OF MODOC COUNTY. WITH LTL CHNG IN PTTRN THE CONVCTN WL CONT IN
THESE AREAS EACH DAY THRU XTNDD PD. AS LOW DROPS S OUT OF GULF OF AK
THE FLOW ALFT WL GRADUALLY BACK. THRU COORDINATN W PDX WL LEAVE TSRA
OUT OF ROGUE BASIN MON FOR NOW BECAUSE OF SLIGHT WLY COMPONENT TO
FLOW. BETTR FLOW INDICATD BY MRF/ECMWF ON TUE. CRAWFORD

.MFR...NONE

.KMAX...VCP 21...OPERATING.

...SEE PDXCCFPDX FOR CODED CITIES FORECAST

MFR UU 056/094 056/093 056 170001
LMT UU 052/087 051/085 051 172222
RBG UU 058/085 058/084 058 170000
4BK UB 052/069 055/068 054 170000
OTH UB 053/069 055/069 055 170000
YKA UU 054/095 054/093 053 172222
MHS UU 053/087 053/085 052 172222
S11 UU 049/089 049/088 048 172222

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 5:38 PM PDT	Flash Flood Warning	MFR	Siskiyou	82 min
Jul 26, 5:38 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	82 min
Jul 26, 6:58 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	92 min

Nearby

Flash Flood Warnings in California, 1997 Every 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.