Alert archive / Idaho / Flash Flood Warnings in 2004

Flash Flood Warning 4, NWS Pocatello, ID

July 18, 20044 counties in Idaho

NWS Pocatello, ID issued this flash flood warning at Jul 18, 2004, 3:49 PM MDT for 4 counties in Idaho. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 18, 2004, 3:49 PM MDT (21:49 UTC)
Expired: Jul 18, 2004, 4:45 PM MDT
In force: 56 min
Issued by: NWS Pocatello, ID
Area: Counties, with a storm outline in the text

Counties Bannock County, ID, Bingham County, ID, Caribou County, ID, Power County, ID

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.8 hours before the alert went out and 243 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: 97 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1791 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 62 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 
WGUS55 KPIH 182149
FFWPIH
IDC005-011-029-077-182245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
349 PM MDT SUN JUL 18 2004

THE NATIONAL WEATHER SERVICE IN POCATELLO/IDAHO FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN BANNOCK COUNTY IN IDAHO
  THIS INCLUDES THE CITIES OF...POCATELLO...MCCAMMON...LAVA HOT
  SPRINGS
  EASTERN BINGHAM COUNTY IN IDAHO
  THIS INCLUDES THE CITY OF BLACKFOOT
  NORTHWESTERN CARIBOU COUNTY IN IDAHO
  EAST CENTRAL POWER COUNTY IN IDAHO

* UNTIL 445 PM MDT

* AT 339 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM FORT
  HALL TO BANCROFT...OR ALONG A LINE EXTENDING FROM 10 MILES NORTH OF
  POCATELLO TO 11 MILES NORTHEAST OF LAVA HOT SPRINGS...MOVING EAST
  AT 10 MPH.

* THUNDERSTORMS PRODUCING FLASH FLOODING WILL BE NEAR...
  OVER FORT HALL BY 355 PM MDT
  5 MILES SOUTH OF GIBSON BY 405 PM MDT
  OVER CHESTERFIELD BY 445 PM MDT

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 4283 11285 4251 11200 4312 11159 4341 11240

$$

KS/TA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 1:15 PM MDT	Flash Flood Warning	PIH	Cassia	30 min
Jul 18, 2:13 PM MDT	Flash Flood Warning	PIH	Oneida	32 min
Jul 18, 2:50 PM MDT	Flash Flood Warning	PIH	Bannock, Oneida, Power	55 min

Nearby

Flash Flood Warnings in Idaho, 2004 Every flash flood warning in 2004

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.