Alert archive / Oregon / Flash Flood Watches in 2018

Flash Flood Watch 1, NWS Medford, OR

April 6, 2018Curry County, Josephine County, Oregon

NWS Medford, OR issued this flash flood watch at Apr 6, 2018, 4:54 PM PDT for Curry County, Josephine County, Oregon. It took effect at Apr 6, 2018, 6:00 PM PDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Apr 6, 2018, 4:54 PM PDT (23:54 UTC)
In effect from: Apr 6, 2018, 6:00 PM PDT
Expired: Apr 7, 2018, 4:00 AM PDT
In force: 10 hr
Issued by: NWS Medford, OR
Flood severity: None

Counties Curry County, OR, Josephine County, OR

The radar

The Medford radar (KMAX), 103 km from the middle of the area, began a volume at 23:58 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, 11.9 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: 713 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 235 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 Apr 6, 2:45 PM PDT, 2 hours 9 minutes earlier.

Area forecast discussion, Apr 6, 2:45 PM PDT, 2 hours 9 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
Apr 5, 8:00 PM PDT	Small Craft Advisory	MFR		9 hr
Apr 6, 1:03 PM PDT	Wind Advisory	MFR	Coos, Curry, Douglas, Jackson, Josephine	30 hr
Apr 6, 2:36 PM PDT	Hazardous Seas Warning	MFR		48 hr

Nearby

Flash Flood Watches in Oregon, 2018 Every flash flood watch in 2018

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.