Alert archive / Oregon / Flash Flood Watches in 2016

Flash Flood Watch 1, NWS Pendleton, OR

May 5, 201611 counties in Oregon

NWS Pendleton, OR issued this flash flood watch at May 5, 2016, 8:49 AM PDT for 11 counties in Oregon. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: May 5, 2016, 8:49 AM PDT (15:49 UTC)
Expired: May 5, 2016, 8:57 PM PDT
In force: 12 hr
Issued by: NWS Pendleton, OR
Flood severity: None

Counties Crook County, OR, Deschutes County, OR, Gilliam County, OR, Grant County, OR, Jefferson County, OR, Morrow County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wasco County, OR, Wheeler County, OR

The radar

The Pendleton radar (KPDT), 106 km from the middle of the area, began a volume at 15:50 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, 3.8 hours before the alert went out and 379 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: 6 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 546 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 50 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 Pendleton, OR wrote its last area forecast discussion before this flash flood watch went out at May 5, 8:27 AM PDT, 22 minutes earlier.

Area forecast discussion, May 5, 8:27 AM PDT, 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 5:21 PM PDT	Special Weather Statement	PDT	Wheeler	24 min
May 4, 5:31 PM PDT	Severe Thunderstorm Warning	PDT	Gilliam, Morrow, Wheeler	29 min
May 4, 6:20 PM PDT	Tornado Warning	PDT	Morrow	25 min
May 4, 7:06 PM PDT	Special Weather Statement	PDT	Umatilla	54 min
May 4, 7:20 PM PDT	Severe Thunderstorm Warning	PDT	Morrow, Umatilla	85 min

Nearby

Flash Flood Watches in Oregon, 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.