Alert archive / Oregon / Flash Flood Watches in 2015

Flash Flood Watch 3, NWS Medford, OR

December 9, 2015Coos County, Douglas County, Oregon; Siskiyou County, California

NWS Medford, OR issued this flash flood watch at Dec 9, 2015, 12:02 PM PST for Coos County, Douglas County, Oregon; Siskiyou County, California. It took effect at Dec 9, 2015, 10:00 PM PST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Dec 9, 2015, 12:02 PM PST (20:02 UTC)
In effect from: Dec 9, 2015, 10:00 PM PST
Expired: Dec 10, 2015, 10:00 AM PST
In force: 12 hr
Issued by: NWS Medford, OR
Flood severity: None

Counties Siskiyou County, CA, Coos County, OR, Douglas County, OR

The radar

The Medford radar (KMAX), 81 km from the middle of the area, began a volume at 20:03 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 12:00Z, 8.0 hours before the alert went out and 52 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 374 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Dec 9, 10:14 AM PST, 1 hour 48 minutes earlier.

Area forecast discussion, Dec 9, 10:14 AM PST, 1 hour 48 minutes before

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In the hours before

Local storm report, Dec 9, 8:50 AM PST, 3 hours 12 minutes before

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Local storm report, Dec 9, 10:38 AM PST, 1 hour 24 minutes before

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Local storm report, Dec 9, 11:09 AM PST, 53 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 9, 1:06 AM PST	Areal Flood Advisory	MFR	Coos, Curry	6 hr
Dec 9, 3:51 AM PST	High Wind Warning	MFR	Coos, Curry, Douglas, Jackson, Josephine, Klamath and 1 more	34 hr
Dec 9, 3:51 AM PST	Wind Advisory	MFR	Curry, Douglas, Jackson, Josephine, Klamath, Lake	34 hr
Dec 9, 5:01 AM PST	Gale Warning	MFR		33 hr
Dec 9, 5:01 AM PST	Hazardous Seas Warning	MFR		5 hr
Dec 9, 5:01 AM PST	Hazardous Seas Warning	MFR		6 days
Dec 9, 5:01 AM PST	Small Craft Advisory for Hazardous Seas	MFR		14 hr
Dec 9, 5:31 AM PST	High Surf Warning	MFR	Coos, Curry, Douglas	68 hr
Dec 9, 2:11 PM PST	Winter Weather Advisory	MFR	Douglas, Jackson, Josephine, Klamath, Lake	32 hr

Nearby

Flash Flood Watches in Oregon, 2015 Flash Flood Watches in California, 2015 Every flash flood watch in 2015

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.