Alert archive / Oregon / High Surf Advisories in 2015

High Surf Advisory 9, NWS Medford, OR

December 20, 2015Coos County, Curry County, Douglas County, Oregon

NWS Medford, OR issued this high surf advisory at Dec 20, 2015, 3:28 PM PST for Coos County, Curry County, Douglas County, Oregon. It took effect at Dec 21, 2015, 4:00 AM PST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Dec 20, 2015, 3:28 PM PST (23:28 UTC)
In effect from: Dec 21, 2015, 4:00 AM PST
Expired: Dec 21, 2015, 11:40 AM PST
In force: 8 hr
Issued by: NWS Medford, OR

Counties Coos County, OR, Curry County, OR, Douglas County, OR

The radar

The Medford radar (KMAX), 135 km from the middle of the area, began a volume at 23:34 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, 11.5 hours before the alert went out and 108 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: 702 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 526 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 high surf advisory 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 high surf advisory went out at Dec 20, 3:25 PM PST, 3 minutes earlier.

Area forecast discussion, Dec 20, 3:25 PM PST, 3 minutes before

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In the hours before

Local storm report, Dec 20, 12:29 PM PST, 2 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
1229 PM PST SUN DEC 20 2015

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 AM     SNOW             MOUNT SHASTA            41.32N 122.31W
12/20/2015  M3.0 INCH        SISKIYOU           CA   TRAINED SPOTTER

            SNOW MEASURED ON TOP OF CAR OBSERVER
            LOCATION IN MT. SHASTA; NORTHERN PART OF
            TOWN.

&&

MND

Local storm report, Dec 20, 12:30 PM PST, 2 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
1230 PM PST SUN DEC 20 2015

...TIME...  ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
...DATE...  ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1229 PM     SNOW             1 NE ALTAMONT           42.21N 121.70W
12/20/2015  M5.0 INCH        KLAMATH            OR   TRAINED SPOTTER

            ELEVATION 4400 FT OBSERVER LOCATION KLAMATH
            FALLS.

&&

MND

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 4:27 AM PST	High Wind Watch	MFR	Coos, Curry, Douglas, Lake	10 hr
Dec 20, 4:58 AM PST	Winter Storm Watch	MFR	Douglas, Jackson, Josephine, Klamath, Lake	10 hr
Dec 20, 9:10 AM PST	River Flood Warning	MFR	Curry	3 days
Dec 20, 9:30 AM PST	River Flood Warning	MFR	Coos	71 hr
Dec 20, 2:45 PM PST	High Wind Warning	MFR	Coos, Curry, Douglas	22 hr
Dec 20, 2:56 PM PST	Gale Warning	MFR		19 hr
Dec 20, 2:56 PM PST	Small Craft Advisory	MFR		19 hr
Dec 20, 2:56 PM PST	Small Craft Advisory	MFR		19 hr
Dec 20, 2:56 PM PST	Storm Warning	MFR		19 hr
Dec 20, 2:56 PM PST	Small Craft Advisory for Hazardous Seas	MFR		48 hr
Dec 20, 3:19 PM PST	Winter Storm Warning	MFR	Douglas, Jackson, Josephine, Klamath, Lake	18 hr
Dec 20, 3:19 PM PST	Winter Weather Advisory	MFR	Klamath, Lake	18 hr
Dec 20, 2:45 PM PST	Wind Advisory	MFR	Siskiyou	22 hr

Nearby

High Surf Advisories in Oregon, 2015 Every high surf advisory 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.