Alert archive / Idaho / Flash Flood Watches in 2013

Flash Flood Watch 1, NWS Missoula, MT

July 16, 2013Idaho County, Lemhi County, Idaho

NWS Missoula, MT issued this flash flood watch at Jul 16, 2013, 8:39 AM PDT for Idaho County, Lemhi County, Idaho. It took effect at Jul 16, 2013, 1:00 PM PDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Jul 16, 2013, 8:39 AM PDT (15:39 UTC)
In effect from: Jul 16, 2013, 1:00 PM PDT
Expired: Jul 16, 2013, 11:00 PM PDT
In force: 10 hr
Issued by: NWS Missoula, MT
Flood severity: None

Counties Idaho County, ID, Lemhi County, ID

The radar

The Missoula radar (KMSX), 191 km from the middle of the area, began a volume at 15:42 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

Boise Airport, ID (KBOI), launched 12:00Z, 3.7 hours before the alert went out and 235 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: 3301 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 40 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 Missoula, MT wrote its last area forecast discussion before this flash flood watch went out at Jul 16, 3:09 AM PDT, 5 hours 30 minutes earlier.

Area forecast discussion, Jul 16, 3:09 AM PDT, 5 hours 30 minutes before

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The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 3:14 PM PDT	Special Weather Statement	MSO	Idaho	46 min

Nearby

Flash Flood Watches in Idaho, 2013 Every flash flood watch in 2013

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.