Alert archive / Idaho / Flash Flood Warnings in 1995

Flash Flood Warning 2, NWS Boise, ID

April 7, 1995Payette County, Washington County, Idaho

NWS Boise, ID issued this flash flood warning at Apr 7, 1995, 8:51 PM MDT for Payette County, Washington County, Idaho. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Apr 7, 1995, 8:51 PM MDT (02:51 UTC)
Expired
Apr 7, 1995, 10:00 PM MDT
In force
69 min
Issued by
NWS Boise, ID
Area
Whole counties

Counties Payette County, ID, Washington County, ID

The radar

The Boise radar (KCBX), 93 km from the middle of the area, began a volume at 02:52 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 00:00Z, 2.9 hours before the alert went out and 87 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 00:00Z on 1995-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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 00:00Z on 1995-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
26 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
1807 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBOI 080252
FFWBOI
IDC001-015-027-045-075-087-085-080400-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BOISE ID
851 PM MDT FRI APR 7 1995
 
THE NATIONAL WEATHER SERVICE IN BOISE ID HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL 1000 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST IDAHO
 
   ...NORTHERN ADA COUNTY...WESTERN BOISE COUNTY
   ...EASTERN CANYON COUNTY...GEM COUNTY...EASTERN PAYETTE COUNTY
   ...SOUTHEASTERN WASHINGTON COUNTY
 
IN WEST CENTRAL IDAHO
 
   ...SOUTHWESTERN VALLEY COUNTY
 
WEATHER SERVICE RADAR INDICATES A LINE OF SEVERE THUNDERSTORMS MOVING
INTO SOUTHWESTERN IDAHO FROM EASTERN OREGON...EXTENDING FROM 45 MILES
NORTH OF BOISE TO 20 MILES SOUTHWEST OF BOISE. THE LINE IS MOVING
NORTHEAST AT 35 MPH.
 
THE STORMS WILL AFFECT THE BOISE AND MERIDIAN AREAS...ALSO HORSESHOE
BEND AND BANKS...DURING THE NEXT 30 MINUTES.
 
REPORTS INDICATE FROM HALF AN INCH TO ONE INCH OF RAINFALL DURING THE
PAST HOUR WITH THIS LINE OF STORMS...ALSO WIND GUSTS OVER 50 MILES AN
HOUR...FREQUENT CLOUD-TO-GROUND LIGHTNING...AND SMALL HAIL.
 
CREEKS ALONG THE BOISE FRONT AND IN THE FOOTHILLS AND MOUNTAINS NORTH OF
BOISE COULD RISE RAPIDLY THIS EVENING.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH..AEHL.AYLHN PLOS ODVO ST.
REB SDASRNBLN  A AF IWS

NN 
    

jjjjj
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BOISE ID
851 PM MDT FRI APR 7 1995
 
THE NATIONAL WEATHER SERVICE IN BOISE ID HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL 1000 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST IDAHO
 
   ...NORTHERN ADA COUNTY...WESTERN BOISE COUNTY
   ...EASTERN CANYON COUNTY...GEM COUNTY...EASTERN PAYETTE COUNTY
   ...SOUTHEASTERN WASHINGTON COUNTY
 
IN WEST CENTRAL IDAHO
 
   ...SOUTHWESTERN VALLEY COUNTY
 
WEATHER SERVICE RADAR INDICATES A LINE OF SEVERE THUNDERSTORMS MOVING
INTO SOUTHWESTERN IDAHO FROM EASTERN OREGON...EXTENDING FROM 45 MILES
NORTH OF BOISE TO 20 MILES SOUTHWEST OF BOISE. THE LINE IS MOVING
NORTHEAST AT 35 MPH.
 
THE STORMS WILL AFFECT THE BOISE AND MERIDIAN AREAS...ALSO HORSESHOE
BEND AND BANKS...DURING THE NEXT 30 MINUTES.
 
REPORTS INDICATE FROM HALF AN INCH TO ONE INCH OF RAINFALL DURING THE
PAST HOUR WITH THIS LINE OF STORMS...ALSO WIND GUSTS OVER 50 MILES AN
HOUR...FREQUENT CLOUD-TO-GROUND LIGHTNING...AND SMALL HAIL.
 
CREEKS ALONG THE BOISE FRONT AND IN THE FOOTHILLS AND MOUNTAINS NORTH OF
BOISE COULD RISE RAPIDLY THIS EVENING.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS0.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 7, 5:29 PM MDT, 3 hours 22 minutes before
IDZ001-080030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
529 PM MDT FRI APR 7 1995

AT 525 PM A STRONG THUNDERSTORM WAS LOCATED IN EXTREME EASTERN MALHEUR
COUNTY OR 10 MILES SOUTHWEST OF WEISER. THIS STORM IS MOVING TO THE
NORTHEAST AT 30 MILES AN HOUR. THIS STORM SHOULD REACH WEISER BY 545 PM.
THIS STORM MAY BRING HEAVY RAIN AND SMALL HAIL.
Special weather statement, Apr 7, 7:34 PM MDT, 1 hour 17 minutes before
IDZ001-006-080230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
734 PM MDT FRI APR 7 1995

AT 730 PM MDT RADAR INDICATED A LINE OF STRONG THUNDERSTORMS FROM 35
MILES NORTHWEST OF ONTARIO TO 50 MILES SOUTHWEST OF ONTARIO AND WAS
MOVING NORTH EAST AT 30 MILES AN HOUR. THESE STORMS SHOULD ENTER THE
WESTERN TREASURE VALLEY AROUND 8PM. ANOTHER LINE OF STRONG THUNDERSTORMS
WAS LOCATED IN NORTHERN GEM COUNTY TO NEAR 10 MILES SOUTH OF MCALL.
THESE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.

THESE STORMS MAY BRING HEAVY RAIN...HIGH WINDS...AND SMALL HAIL.
Special weather statement, Apr 7, 7:35 PM MDT, 1 hour 16 minutes before
IDZ001-006-080230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BOISE ID
734 PM MDT FRI APR 7 1995

AT 730 PM MDT RADAR INDICATED A LINE OF STRONG THUNDERSTORMS FROM 35
MILES NORTHWEST OF ONTARIO TO 50 MILES SOUTHWEST OF ONTARIO AND WAS
MOVING NORTH EAST AT 30 MILES AN HOUR. THESE STORMS SHOULD ENTER THE
WESTERN TREASURE VALLEY AROUND 8PM. ANOTHER LINE OF STRONG THUNDERSTORMS
WAS LOCATED IN NORTHERN GEM COUNTY TO NEAR 10 MILES SOUTH OF MCAL6L.
THESE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.

THESE STORMS MAY BRING HEAVY RAIN...HIGH WINDS...AND SMALL HAIL.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 6:18 PM MDTSevere Thunderstorm WarningBOIWashington37 min
Apr 7, 7:55 PM MDTSevere Thunderstorm WarningBOICanyon, Payette35 min
Apr 7, 8:30 PM MDTSevere Thunderstorm WarningBOICanyon, Gem, Payette30 min
Apr 7, 8:51 PM MDTFlash Flood WarningBOIAda, Boise, Canyon, Gem69 min
Apr 7, 8:51 PM MDTFlash Flood WarningBOIValley69 min
Apr 7, 8:51 PM MDTSevere Thunderstorm WarningBOIAda, Boise, Gem, Valley69 min
Apr 7, 8:51 PM MDTSevere Thunderstorm WarningBOIPayette, Washington69 min
Apr 7, 8:51 PM MDTSevere Thunderstorm WarningBOICanyon69 min

Nearby

Flash Flood Warnings in Idaho, 1995Every flash flood warning in 1995

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.