Alert archive / Idaho / Flash Flood Warnings in 1997

Flash Flood Warning 13, NWS Pocatello, ID

August 11, 1997Bannock County, Idaho

NWS Pocatello, ID issued this flash flood warning at Aug 11, 1997, 3:20 PM MDT for Bannock County, Idaho. It was in force for 70 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 11, 1997, 3:20 PM MDT (21:20 UTC)
Expired
Aug 11, 1997, 4:30 PM MDT
In force
70 min
Issued by
NWS Pocatello, ID
Area
Whole counties

County Bannock County, ID

The radar

The Pocatello radar (KSFX), 61 km from the middle of the area, began a volume at 21:20 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.3 hours before the alert went out and 212 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, Salt Lake City I, UT at 12:00Z on 1997-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 66 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, Salt Lake City I, UT at 12:00Z on 1997-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 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
66 J/kg
Mixed-layer CIN
-184 J/kg
Mixed-layer LCL
1617 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIH 112125
FFWPIH
IDC005-112230-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
320 PM MDT MON AUG 11 1997
 
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  430 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST IDAHO
 
   ...CENTRAL BANNOCK COUNTY
 
AT 320 PM MDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 10 MILES
WEST OF THE TOWN OF ROBIN IN CENTRAL BANNOCK COUNTY MOVING EAST AT 10
MPH. RADAR RAIN FALL ESTIMATES INDICATE BETWEEN ONE AND ONE HALF INCH OF
RAIN MAY HAVE FALLEN DURING THE PAST 30 MINUTES. THE STORM WILL MOVE
ACROSS THE BANNOCK MOUNTAIN RANGE AND ACROSS INTERSTATE 15 BETWEEN THE
TOWN OF ROBIN AND MCCAMMON BY 345 PM. LOCAL FLOODING OF STREAMS AND ROAD
WAYS IS LIKELY AS THE STORM PASSES.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.
 
SURVICK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 6:04 PM MDTSevere Thunderstorm WarningPIHCassia, Oneida41 min
Aug 10, 6:49 PM MDTSevere Thunderstorm WarningPIHOneida41 min
Aug 11, 3:48 PM MDTFlash Flood WarningPIHPower57 min

Nearby

Flash Flood Warnings in Idaho, 1997Every flash flood warning 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.