Alert archive / Idaho / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 460
The Storm Prediction Center issued this severe thunderstorm watch at Aug 13, 2014, 1:21 PM MDT for 11 counties in Idaho; Elko County, Nevada. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2014, 1:21 PM MDT (19:21 UTC)
- Expired
- Aug 13, 2014, 8:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Ada County, ID, Blaine County, ID, Camas County, ID, Cassia County, ID, Elmore County, ID, Gooding County, ID, Jerome County, ID, Lincoln County, ID, Minidoka County, ID, Owyhee County, ID, Twin Falls County, ID, Elko County, NV
The radar
The Boise radar (KCBX), 144 km from the middle of the area, began a volume at 19:21 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 1:26 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 49 min |
| Aug 13, 1:44 PM MDT | Tornado Warning | LKN | Elko | 31 min |
| Aug 13, 1:45 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee | 60 min |
| Aug 13, 1:55 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 50 min |
| Aug 13, 2:31 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 44 min |
| Aug 13, 2:41 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 25 min |
| Aug 13, 2:42 PM MDT | Severe Thunderstorm Warning | BOI | Owyhee, Twin Falls | 31 min |
| Aug 13, 2:48 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 42 min |
| Aug 13, 3:08 PM MDT | Severe Thunderstorm Warning | BOI | Twin Falls | 67 min |
| Aug 13, 3:08 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 52 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, 4:23 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Power | 52 min |
| Aug 13, 4:32 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Minidoka | 28 min |
| Aug 13, 4:44 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Elmore | 46 min |
| Aug 13, 4:55 PM MDT | Severe Thunderstorm Warning | LKN | Elko | 35 min |
| Aug 13, 4:56 PM MDT | Flash Flood Warning | BOI | Twin Falls | 9 hr |
| Aug 13, 5:31 PM MDT | Flash Flood Warning | LKN | Elko | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 7.4 hours before the alert went out and 149 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.
- 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
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:11 PM MDT | Mesoscale Discussion | SPC | Benewah, Kootenai, Latah, Lewis, Nez Perce | 64 min |
| Aug 13, 12:44 PM MDT | Mesoscale Discussion | SPC | Gooding, Owyhee, Twin Falls | 2 hr |
| Aug 13, 3:48 PM MDT | Mesoscale Discussion | SPC | Adams, Benewah, Clark, Clearwater, Custer, Idaho and 8 more | 117 min |
| Aug 13, 4:26 PM MDT | Mesoscale Discussion | SPC | Bannock, Bingham, Blaine, Butte, Camas, Cassia and 8 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Idaho, 2014Severe Thunderstorm Watches in Nevada, 2014Every severe thunderstorm watch 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.