Alert archive / Idaho / Flash Flood Warnings in 1987

Flash Flood Warning 2, NWS Pocatello, ID

May 16, 1987Bannock County, Idaho

NWS Pocatello, ID issued this flash flood warning at May 16, 1987, 5:20 PM MDT for Bannock County, Idaho. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 16, 1987, 5:20 PM MDT (23:20 UTC)
Expired
May 16, 1987, 7:20 PM MDT
In force
2 hr
Issued by
NWS Pocatello, ID
Area
Whole counties

County Bannock County, ID

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 11.3 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 1987-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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 1987-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
17 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
1617 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
54 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 162323
FFWPIH
IDC005-019-081-170120-

BULLETIN EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
520 PM MDT SAT MAY 16 1987

IDAHO COUNTIES AFFECTED...BANNOCK...BONNEVILLE...TETON

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING UNTIL
720PM MDT FOR PEOPLE IN THE SOUTHEAST IDAHO COUNITES OF BANNOCK
...BONNEVILLE...AND TETON.

SLOW MOVING THUNDERSTORMS ARE OVER SOUTHEAST IDAHO TODAY.
FLASH FLOODING HAS OCCURRED OVER PARTS OF SOUTHEAST IDAHO IN THE      .
PAST HOUR.  AREAS SO FAR AFFECTED ARE...RAPAD CREEK NEAR INKOM...PINE
CREEK WEST OF SWAN FALLS...AND PARTS OF THE RAODWAY SOUTH OF DRIGGS.
PEOPLE IN THESE AREAS AS WELL AS OTHER STEEP RIVER DRAINAGES ARE
URGED TO BE ALERT FOR RAPIDLY RISING WATER AND DEBRIS OVER ROADWAYS.

A FLASH FLOOD WATCH FOR MOST OF SOUTHEAST IDAHO REAMAINS IN EFFECT
UNTIL MIDNIGHT.

PERSONS SHOULD NOT ATTEMPT TO CROSS RISING WATER EITHER ON FOOT ON IN
A VEHICLE.  INSTEAD...SEEK HIGHER GROUND IMMEDIATELY.  MOTORISTS IN
AREAS OF HEAVY RAINFALL SHOULD BE ALERT FOR DEBRIS ON THE ROADS AND
POSSIBLY MUD SLIDES.

CALL YOUR REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE
AT 236-6900 OR RELAY YOUR REPORTS OF FLOODING TO YOUR NEAREST LAW
ENFORCEMENT AGENCY.

STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL STATIONS FOR UPDATES
OR ADDITONAL WARNINGS.

HUBBLE

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 5:20 PM MDTFlash Flood WarningPIHBonneville, Teton2 hr

Nearby

Flash Flood Warnings in Idaho, 1987Every flash flood warning in 1987

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.