Alert archive / Idaho / Flash Flood Warnings in 2014

Flash Flood Warning 20, NWS Boise, ID

August 8, 2014Boise County, Camas County, Elmore County, Idaho

NWS Boise, ID issued this flash flood warning at Aug 8, 2014, 2:05 PM MDT for Boise County, Camas County, Elmore County, Idaho. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 8, 2014, 2:05 PM MDT (20:05 UTC)
Expired
Aug 8, 2014, 6:00 PM MDT
In force
4 hr
Issued by
NWS Boise, ID
Area
Storm-based polygon
Flood severity
None

Counties Boise County, ID, Camas County, ID, Elmore County, ID

The radar

The Boise radar (KCBX), 74 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 70 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-pSkew-T log-p diagram, Boise Airport, ID at 12:00Z on 2014-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 12:00Z on 2014-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
48 J/kg
Mixed-layer CIN
-343 J/kg
Mixed-layer LCL
2026 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 6:59 PM MDTFlash Flood WarningBOIBoise, Elmore61 min
Aug 7, 9:04 PM MDTFlash Flood WatchBOIOwyhee, Twin Falls6 hr
Aug 8, 3:23 AM MDTFlash Flood WatchBOIBoise, Camas, Elmore15 hr
Aug 8, 2:14 PM MDTSpecial Weather StatementBOITwin Falls46 min
Aug 8, 2:55 PM MDTSpecial Weather StatementBOITwin Falls50 min
Aug 8, 3:08 PM MDTSevere Thunderstorm WarningBOITwin Falls52 min
Aug 8, 5:33 PM MDTSpecial Weather StatementBOIOwyhee42 min

Nearby

Flash Flood Warnings in Idaho, 2014Every flash flood warning in 2014

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.