Alert archive / Idaho / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 27, NWS Boise, ID

August 13, 2014Owyhee County, Twin Falls County, Idaho

NWS Boise, ID issued this severe thunderstorm warning at Aug 13, 2014, 2:42 PM MDT for Owyhee County, Twin Falls County, Idaho. It was in force for 31 min. 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 13, 2014, 2:42 PM MDT (20:42 UTC)
Expired: Aug 13, 2014, 3:13 PM MDT
In force: 31 min
Issued by: NWS Boise, ID
Area: Storm-based polygon

Counties Owyhee County, ID, Twin Falls County, ID

The radar

The Boise radar (KCBX), 132 km from the middle of the area, began a volume at 20:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 13, 1:21 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 8.7 hours before the alert went out and 138 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: 114 J/kg
Mixed-layer CIN: -245 J/kg
Mixed-layer LCL: 1811 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 92 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 severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 13, 9:49 AM MDT, 4 hours 53 minutes earlier.

Area forecast discussion, Aug 13, 9:49 AM MDT, 4 hours 53 minutes before

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In the hours before

Local storm report, Aug 13, 11:37 AM MDT, 3 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
1137 AM MDT WED AUG 13 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0550 PM     TSTM WND DMG     HAGERMAN                42.82N 114.90W
08/12/2014                   GOODING            ID   NEWSPAPER

            POWER POLES DOWN 2 MILES NW OF HAGERMAN.

&&

ABRAUN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 9:06 PM MDT	Red Flag Warning	BOI	Adams, Boise, Gem, Idaho, Payette, Valley and 1 more	27 hr
Aug 13, 1:45 PM MDT	Severe Thunderstorm Warning	BOI	Owyhee	60 min
Aug 13, 3:08 PM MDT	Severe Thunderstorm Warning	BOI	Twin Falls	67 min
Aug 13, 3:23 PM MDT	Severe Thunderstorm Warning	BOI	Elmore, Owyhee	52 min
Aug 13, 3:27 PM MDT	Severe Thunderstorm Warning	BOI	Jerome, Twin Falls	63 min
Aug 13, 3:45 PM MDT	Flash Flood Warning	BOI	Elmore	6 hr
Aug 13, 4:03 PM MDT	Severe Thunderstorm Warning	BOI	Ada, Elmore	42 min
Aug 13, 4:30 PM MDT	Areal Flood Advisory	BOI	Twin Falls	3 hr
Aug 13, 4:44 PM MDT	Severe Thunderstorm Warning	BOI	Ada, Boise, Elmore	46 min
Aug 13, 4:56 PM MDT	Flash Flood Warning	BOI	Twin Falls	9 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2014 Every severe thunderstorm 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.