Alert archive / Idaho / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 668

July 29, 199728 counties in Idaho; Malheur County, Oregon

The Storm Prediction Center issued this severe thunderstorm watch at Jul 29, 1997, 2:00 PM MDT for 28 counties in Idaho; Malheur County, Oregon. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 29, 1997, 2:00 PM MDT (20:00 UTC)
Expired
Jul 29, 1997, 8:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 29 counties

Ada County, ID, Bannock County, ID, Bear Lake County, ID, Bingham County, ID, Blaine County, ID, Boise County, ID, Bonneville County, ID, Butte County, ID, Camas County, ID, Canyon County, ID, Caribou County, ID, Cassia County, ID, Elmore County, ID, Franklin County, ID, Fremont County, ID, Gem County, ID, Gooding County, ID, Jefferson County, ID, Jerome County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Oneida County, ID, Owyhee County, ID, Payette County, ID, Power County, ID, Teton County, ID, Twin Falls County, ID, Malheur County, OR

The radar

The Boise radar (KCBX), 80 km from the middle of the area, began a volume at 19:57 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.

Warnings issued inside it

2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 29, 2:32 PM MDTSevere Thunderstorm WarningBOIElmore, Owyhee58 min
Jul 29, 3:31 PM MDTSevere Thunderstorm WarningBOIElmore59 min

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 8.0 hours before the alert went out and 286 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, Elko, NV at 12:00Z on 1997-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 115 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, Elko, NV at 12:00Z on 1997-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.19395878Sfc1 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
115 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1429 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Severe Thunderstorm Watches in Idaho, 1997Severe Thunderstorm Watches in Oregon, 1997Every severe thunderstorm watch in 1997

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.