Alert archive / California / Flash Flood Warnings in 1998
Flash Flood Warning 9, NWS Medford, OR
NWS Medford, OR issued this flash flood warning at Jul 2, 1998, 5:51 PM PDT for Modoc County, Siskiyou County, California. It was in force for 59 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 2, 1998, 5:51 PM PDT (00:51 UTC)
- Expired
- Jul 2, 1998, 6:50 PM PDT
- In force
- 59 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
Counties Modoc County, CA, Siskiyou County, CA
The radar
The Medford radar (KMAX), 105 km from the middle of the area, began a volume at 00:53 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, 0.9 hours before the alert went out and 130 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.
- Mixed-layer CAPE
- 56 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1391 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMFR 030050 FFWMFR CAC049-093-030150- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MEDFORD OR 551 PM PDT THU JUL 2 1998 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME SOUTHEASTERN SISKIYOU COUNTY IN NORTH CENTRAL CALIFORNIA EXTREME SOUTHWESTERN MODOC COUNTY IN NORTHEASTERN CALIFORNIA * UNTIL 650 PM PDT * AT 540 PM PDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN 13 MILES EAST OF PONDOSA OR 3 MILES SOUTH OF WHITEHORSE FLAT RESERVOIR. THE THUNDERSTORM IS NEARLY STATIONARY. MOVE TO HIGHER GROUND IF FLOOD WATERS THREATEN. SARGEANT
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 2, 2:30 PM PDT, 3 hours 21 minutes earlier.
Area forecast discussion, Jul 2, 2:30 PM PDT, 3 hours 21 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT THU JUL 02 1998 FA TO REMAIN IN MEAN TROF POSITION NEXT FEW DAYS. FIRST VORT LOBE MOVED THRU REGION EARLY AND SET OFF SOME TSTORMS LAKE CTY. THIS HAS MOVED NEWD. NEXT LOBE MOVING INTO NWRN CA STARTING TO GENERATE STORMS SISKIYOU CTY EWD NOW. WATER VAPOR SHOWS MORE SMALL VORTS MOVING THRU TROF. FOR THE MOST PART..DONT SEE MUCH CHANGE NEXT FEW DAYS. ONSHORE FLO WILL GIVE LOW CLOUDS WEST OF CASCDS WITH AFTERNOON CLEARING AS SFC RIDGE STARTS TO BUILD INTO NRN ORE. CASCADES AND SISKIYOUS EWD SHUD SEE SCT AFTERNOON AND EVE CONVECTION..THO MODELS FCST WEAKENING INSTABILITY FRI/SAT. TEMPS TO REMAIN AT OR BELOW NORMAL. RC KMFR...FLASH FLOOD WATCH ORZ015 THRU 10PM .KMAX...VCP 21 ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR BB 060/078 059/081 059 061111 LMT BB 048/077 048/078 048 064333 RBG EE 058/069 057/072 057 061111 4BK EE 053/066 053/068 053 061111 OTH EE 054/063 054/063 054 061111 YKA BB 051/083 050/084 050 064333 MHS BB 052/080 052/082 052 064333 S11 BB 048/080 046/082 047 063333
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 5:24 PM PDT | Severe Thunderstorm Warning | MFR | Modoc, Siskiyou | 31 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; radar from the NEXRAD Level II archive.