Alert archive / Oregon / Flash Flood Warnings in 1997

Flash Flood Warning 7, NWS Boise, ID

June 11, 1997Malheur County, Oregon

NWS Boise, ID issued this flash flood warning at Jun 11, 1997, 5:37 PM MDT for Malheur County, Oregon. It was in force for 68 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
Jun 11, 1997, 5:37 PM MDT (23:37 UTC)
Expired
Jun 11, 1997, 6:45 PM MDT
In force
68 min
Issued by
NWS Boise, ID
Area
Whole counties

County Malheur County, OR

The radar

The Boise radar (KCBX), 117 km from the middle of the area, began a volume at 23:37 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

Boise Airport, ID (KBOI), launched 12:00Z, 11.6 hours before the alert went out and 122 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, Boise Airport, ID at 12:00Z on 1997-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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, Boise Airport, ID at 12:00Z on 1997-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
12 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
1154 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
84 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 KBOI 112338
FFWBOI
ORC045-120045-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BOISE ID
537 PM MDT WED JUN 11 1997
 
THE NATIONAL WEATHER SERVICE IN BOISE ID HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  545 PM PDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST OREGON
 
   ...NORTHERN MALHEUR COUNTY
 
AT 435 PM PDT DOPPLER RADAR IN BOISE INDICATED STRONG THUNDERSTORMS
PRODUCING HEAVY RAINFALL IN NORTHERN MALHEUR COUNTY. A STORM SPOTTER IN
WESTFALL OREGON REPORTED .80 INCHES OF RAIN IN 30 MINUTES. THE STORM WAS
LOCATED 5 MILES SOUTHWEST OF BROGAN OR 30 MILES WEST OF ONTARIO.
 
THE STORM WAS MOVING SLOWLY TO THE NORTHEAST AT 5 TO 10 MILES PER HOUR
AND WILL AFFECT THE AREA FROM MALHEUR CITY TO JAMISON BETWEEN BY 500 PM
PDT.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 4:21 PM MDTSevere Thunderstorm WarningBOIMalheur54 min

Nearby

Flash Flood Warnings in Oregon, 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.