Alert archive / California / Flash Flood Warnings in 1998
Flash Flood Warning 3, NWS Medford, OR
NWS Medford, OR issued this flash flood warning at Jun 11, 1998, 8:11 PM PDT for Modoc County, California. It was in force for 2 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 11, 1998, 8:11 PM PDT (03:11 UTC)
- Expired
- Jun 11, 1998, 10:40 PM PDT
- In force
- 2 hr
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Modoc County, CA
The radar
The Medford radar (KMAX), 174 km from the middle of the area, began a volume at 03:12 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, 3.2 hours before the alert went out and 192 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Jun 11, 2:30 PM PDT, 5 hours 41 minutes earlier.
Area forecast discussion, Jun 11, 2:30 PM PDT, 5 hours 41 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT THU JUN 11 1998 LOW PRESSURE CENTERED JUST OFFSHORE OF SFO BAY CONTINUES TO SLIDE SOUTH THIS AFTERNOON. WRAP AROUND FLOW AND ASSOCIATED SCATTERED SHOWERS OVER NORTHERN CALIFORNIA AND EXTREME SOUTHERN OREGON EAST OF CASCADES WILL CONTINUE THROUGH THIS EVENING. LOOKS LIKE SOME CONVECTION BREAKING OUT OVER OREGONS SOUTHEASTERN CORNER. THIS ACTION MAY DRIFT INTO LAKE...KLAMATH...MODOC...AND EASTERN SISKIYOU COUNTY THIS EVENING. WILL LEAVE SLIGHT CHANCE POPS IN FIRST PERIOD THOSE COUNTIES. NORTHEASTERLY FLOW WEAKENS AND GRADUALLY BECOMES NORTHERLY TOMORROW. PRESSURE GRADIENTS REMAIN STRONG FOR ANOTHER WINDY DAY AT THE COAST. GRADIENTS RELAX A BIT SATURDAY. MODELS DEPICT SOME INSTABILTY EAST OF CASCADES. FIGURE SOME ISOLATED AFTERNOON STORMS. XTDD...RIDGE AXIS CENTERED NEAR 145W STAYS PUT THROUGH TUESDAY RESULTING IN A NORTHWEST FLOW THROUGH TUESDAY. DRY SUNNY WEATHER WITH NORMAL TO SLIGHTLY ABOVE NORMAL TEMPERATURES. SARGEANT .KMFR...NONE. .KMAX...VCP 21 ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR UU 050/082 049/084 051 071--- LMT UU 045/075 044/076 045 072211 RBG UU 051/079 052/080 053 071000 4BK UU 052/072 052/071 052 070000 OTH UB 052/064 053/065 053 070000 YKA UU 046/080 047/082 049 072111 MHS UU 048/074 049/075 050 072111 S11 UU 043/076 043/077 045 072211
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 1:23 PM PDT | Flash Flood Warning | MFR | Modoc | 3 hr |
| Jun 12, 3:01 PM PDT | Flash Flood Warning | MFR | Siskiyou | 84 min |
| Jun 12, 4:13 PM PDT | Flash Flood Warning | MFR | Modoc, Siskiyou | 3 hr |
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.