Alert archive / California / Flash Flood Watches in 2016

Flash Flood Watch 7, NWS Medford, OR

December 13, 2016Siskiyou County, California

NWS Medford, OR issued this flash flood watch at Dec 13, 2016, 4:52 PM PST for Siskiyou County, California. It took effect at Dec 14, 2016, 4:00 AM PST. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Dec 13, 2016, 4:52 PM PST (00:52 UTC)
In effect from: Dec 14, 2016, 4:00 AM PST
Expired: Dec 14, 2016, 10:00 PM PST
In force: 18 hr
Issued by: NWS Medford, OR
Flood severity: None

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 00:51 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 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 146 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 13, 3:52 PM PST, 1 hour earlier.

Area forecast discussion, Dec 13, 3:52 PM PST, 1 hour 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 14, 5:13 AM PST	Small Craft Advisory for Hazardous Seas	MFR		10 hr
Dec 14, 12:03 PM PST	Areal Flood Advisory	MFR	Jackson, Josephine	7 hr
Dec 14, 2:10 PM PST	Winter Weather Advisory	MFR	Klamath, Lake	20 hr

Nearby

Flash Flood Watches in California, 2016 Every flash flood watch in 2016

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.