Alert archive / Idaho / Flash Flood Watches in 2016

Flash Flood Watch 2, NWS Boise, ID

May 6, 2016Owyhee County, Twin Falls County, Idaho; Harney County, Malheur County, Oregon

NWS Boise, ID issued this flash flood watch at May 6, 2016, 9:53 AM MDT for Owyhee County, Twin Falls County, Idaho; Harney County, Malheur County, Oregon. It took effect at May 6, 2016, 12:00 PM MDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: May 6, 2016, 9:53 AM MDT (15:53 UTC)
In effect from: May 6, 2016, 12:00 PM MDT
Expired: May 7, 2016, 2:39 AM MDT
In force: 15 hr
Issued by: NWS Boise, ID
Flood severity: None

Counties Owyhee County, ID, Twin Falls County, ID, Harney County, OR, Malheur County, OR

The radar

The Boise radar (KCBX), 92 km from the middle of the area, began a volume at 15:55 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

Reno, NV (KREV), launched 12:00Z, 3.9 hours before the alert went out and 376 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: 830 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 348 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 Boise, ID wrote its last area forecast discussion before this flash flood watch went out at May 6, 3:10 AM MDT, 6 hours 43 minutes earlier.

Area forecast discussion, May 6, 3:10 AM MDT, 6 hours 43 minutes before

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The office that day

Everything else NWS Boise, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 5, 7:03 PM MDT	Special Weather Statement	BOI	Adams	42 min
May 5, 7:19 PM MDT	Special Weather Statement	BOI	Adams	26 min
May 5, 7:29 PM MDT	Severe Thunderstorm Warning	BOI	Adams	31 min
May 6, 3:24 PM MDT	Areal Flood Advisory	BOI	Owyhee	24 hr

Nearby

Flash Flood Watches in Idaho, 2016 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.