Alert archive / Oregon / Flash Flood Warnings in 2005

Flash Flood Warning 1, NWS Portland, OR

August 29, 2005Multnomah County, Oregon; Clark County, Washington

NWS Portland, OR issued this flash flood warning at Aug 29, 2005, 3:25 PM PDT for Multnomah County, Oregon; Clark County, Washington. It was in force for 80 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 29, 2005, 3:25 PM PDT (22:25 UTC)
Expired
Aug 29, 2005, 4:45 PM PDT
In force
80 min
Issued by
NWS Portland, OR
Area
Counties, with a storm outline in the text

Counties Multnomah County, OR, Clark County, WA

The radar

The Portland,OR radar (KRTX), 40 km from the middle of the area, began a volume at 22:26 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.

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.

NWS Portland, OR wrote its last area forecast discussion before this flash flood warning went out at Aug 29, 3:00 PM PDT, 25 minutes earlier.

Area forecast discussion, Aug 29, 3:00 PM PDT, 25 minutes before
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Hazardous weather outlook, Aug 29, 5:41 AM PDT, 9 hours 44 minutes before
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In the hours before

Special weather statement, Aug 29, 10:29 AM PDT, 4 hours 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PORTLAND OR
1029 AM PDT MON AUG 29 2005

WAZ019-040-301730-
SOUTH WASHINGTON CASCADES-SOUTH WASHINGTON CASCADE FOOTHILLS-
INCLUDING THE CITIES OF...COLDWATER RIDGE VISITORS CENTER...
MOUNT ST. HELENS...TOUTLE...ARIEL...COUGAR
1029 AM PDT MON AUG 29 2005

...WIND FORECAST FOR MOUNT ST HELENS FOR PLANNING PURPOSES...

.SYNOPSIS...COLD UPPER TROUGH WILL BE OVER AREA TODAY. MODERATE
TO STRONG WEST FLOW WILL CONTINUE TODAY. HIGH PRESSURE BUILDS
INTO AREA TUESDAY. WEST FLOW ON TUESDAY MORNING BECOMES NORTHWEST
IN THE AFTERNOON. NORTH TO NORTHWEST FLOW CONTINUES WEDNESDAY AND
THURSDAY.

=====================================================================
= KEY TO DECODING THE WIND DATA...                                  =
= FORMAT... 168025 WHERE FIRST THREE DIGITS ARE THE WIND DIRECTION  =
= AND THE LAST THREE DIGITS ARE THE WIND SPEED.                     =
= IN THIS EXAMPLE, WIND IS FROM 168 (SOUTH) AT 25 MPH.              =
= ***** ALL WIND DATA ARE IN MILES PER HOUR *****                   =
=====================================================================

SALEM BALLOON SOUNDING WIND 08/29 (12Z)

   200 FT      170006 (MPH)
   400 FT      185008 (MPH)
  1000 FT      240017 (MPH)
  2000 FT      255018 (MPH)
  2500 FT      255018 (MPH)
  3000 FT      255018 (MPH)
  4000 FT      260016 (MPH)
  4800 FT      260014 (MPH)
  5000 FT      260013 (MPH)
  6000 FT      260010 (MPH)
  7000 FT      270009 (MPH)
  8000 FT      290014 (MPH)
  9000 FT      290017 (MPH)
  9900 FT      285018 (MPH)
 12000 FT      270024 (MPH)
 14000 FT      250032 (MPH)
 16000 FT      240037 (MPH)
 18400 FT      230043 (MPH)
 20000 FT      230045 (MPH)
 22000 FT      225053 (MPH)
 23700 FT      220070 (MPH)
 25000 FT      215089 (MPH)
 28000 FT      210128 (MPH)
 30000 FT      215122 (MPH)
 30300 FT      215121 (MPH)
 34400 FT      220122 (MPH)
 35000 FT      220122 (MPH)
 39300 FT      225089 (MPH)
 44000 FT      225067 (MPH)
 45500 FT      220084 (MPH)
 47000 FT      225083 (MPH)
 50000 FT      230064 (MPH)
 54000 FT      230038 (MPH)
 54100 FT      230038 (MPH)

AVN MODEL WINDS ALOFT VALID 200508291200

ELEV.   08/29 0500PDT  08/29 1700PDT  08/30 0500PDT  08/30 1700PDT
  3000         266016         264010         296007         320014
  6000         274021         281013         313015         342014
  9000         270022         277014         323017         325016
 12000         274024         291016         330023         302024
 15000         268026         299019         334038         299026
 18000         254024         305021         332046         305028
 21000         237023         309022         330050         302029
 24000         213039         312026         324054         298038
 27000         205069         330037         320061         291044
 30000         207093         338050         316065         288044
 33000         212095         329046         316067         291045
 36000         216084         311040         311064         288046
 39000         221071         293034         303058         278048
 42000         221068         283032         297050         276051
 45000         222063         274030         292042         273054
 48000         228053         265030         286038         266046
 51000         233042         256030         279034         259037
Special weather statement, Aug 29, 11:36 AM PDT, 3 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PORTLAND OR
1136 AM PDT MON AUG 29 2005

ORZ001-003>012-WAZ019>023-039-040-292030-
CASCADE FOOTHILLS IN LANE COUNTY-LOWER COLUMBIA-
GREATER VANCOUVER AREA-SOUTH WILLAMETTE VALLEY-
NORTHERN OREGON CASCADES-NORTHERN OREGON CASCADE FOOTHILLS-
CENTRAL COAST RANGE OF WESTERN OREGON-GREATER PORTLAND METRO AREA-
CENTRAL WILLAMETTE VALLEY-WESTERN COLUMBIA RIVER GORGE-
NORTH OREGON COAST-COAST RANGE OF NORTHWEST OREGON-
SOUTH WASHINGTON COAST-LOWER COLUMBIA AND I -
5 CORRIDOR IN COWLITZ COUNTY-WILLAPA HILLS-SOUTH WASHINGTON CASCADES-
SOUTH WASHINGTON CASCADE FOOTHILLS-
1136 AM PDT MON AUG 29 2005

...FUNNEL CLOUD REPORTED NEAR INDEPENDENCE...

AT 1124 AM PDT...A CITIZEN IN POLK COUNTY REPORTED A FUNNEL CLOUD
NEAR INDEPENDENCE MOVING EAST. THE FUNNEL CLOUD DID NOT TOUCH THE
GROUND AND HAS SINCE DISSIPATED. NUMEROUS OTHER HEAVY SHOWERS AND
THUNDERSTORMS ARE CONTINUING TO DEVELOP ACROSS THE REGION...AND
COULD PRODUCE BRIEF COLD CORE FUNNEL CLOUDS THROUGH THIS AFTERNOON.

WHILE THESE FUNNEL CLOUDS...WHILE REMAINING OFF THE SURFACE...ARE
NOT A THREAT TO LIFE OR PROPERTY...THE PUBLIC IS URGED TO REPORT
FUNNEL CLOUD SIGHTINGS TO THE NATIONAL WEATHER SERVICE OR YOUR LOCAL
LAW ENFORCEMENT OFFICIALS.

WEATHER.GOV/PORTLAND
Local storm report, Aug 29, 1:25 PM PDT, 2 hours before
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The office that day

Everything else NWS Portland, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 3:50 PM PDTFlash Flood WarningPQRClackamas55 min

Nearby

Flash Flood Warnings in Oregon, 2005Flash Flood Warnings in Washington, 2005Every flash flood warning in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.