Alert archive / Washington / Red Flag Warnings in 2010

Red Flag Warning 4, NWS Pendleton, OR

July 25, 2010Clark County, Cowlitz County, Skamania County, Washington

NWS Pendleton, OR issued this red flag warning at Jul 25, 2010, 8:41 AM PDT for Clark County, Cowlitz County, Skamania County, Washington. It took effect at Jul 25, 2010, 1:00 PM PDT. It was in force for 3 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 25, 2010, 8:41 AM PDT (15:41 UTC)
In effect from
Jul 25, 2010, 1:00 PM PDT
Expired
Jul 28, 2010, 8:15 PM PDT
In force
3 days
Issued by
NWS Pendleton, OR

Counties Clark County, WA, Cowlitz County, WA, Skamania County, WA

The radar

The Portland,OR radar (KRTX), 56 km from the middle of the area, began a volume at 15:38 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 3.7 hours before the alert went out and 405 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, Medford/Jackson, OR at 12:00Z on 2010-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Medford/Jackson, OR at 12:00Z on 2010-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2152 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Pendleton, OR wrote its last area forecast discussion before this red flag warning went out at Jul 25, 4:20 AM PDT, 4 hours 21 minutes earlier.

Area forecast discussion, Jul 25, 4:20 AM PDT, 4 hours 21 minutes before
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Hazardous weather outlook, Jul 25, 5:15 AM PDT, 3 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
515 AM PDT SUN JUL 25 2010...CORRECTED

CORRECTED A TYPO

ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-261145-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
CENTRAL OREGON-LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-
WALLOWA COUNTY-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN-
OCHOCO-JOHN DAY HIGHLANDS-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY-
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
NORTHWEST BLUE MOUNTAINS OF WASHINGTON-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
515 AM PDT SUN JUL 25 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

FIRE WEATHER WATCH
     NORTH CENTRAL OREGON, CENTRAL OREGON, NORTHERN WHEELER AND
     SOUTHERN GILLIAM COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY
     HIGHLANDS

     CONTACT YOUR LOCAL FOREST OR LAND MANAGEMENT AGENCY FOR
     CURRENT FIRE DANGER CONDITIONS IN YOUR AREA.

THUNDERSTORMS
     NORTH CENTRAL OREGON, JOHN DAY BASIN, OCHOCO-JOHN DAY
     HIGHLANDS

EXCESSIVE HEAT
     EASTERN COLUMBIA RIVER GORGE OF WASHINGTON, KITTITAS VALLEY,
     YAKIMA VALLEY, LOWER COLUMBIA BASIN OF WASHINGTON, FOOTHILLS
     OF THE BLUE MOUNTAINS OF WASHINGTON, EASTERN COLUMBIA RIVER
     GORGE OF OREGON, LOWER COLUMBIA BASIN OF OREGON, FOOTHILLS OF
     THE BLUE MOUNTAINS OF OREGON

HIGH PRESSURE ALOFT AND A SOUTHWEST FLOW IN THE LOWER LEVELS WILL
RESULT IN SUBSIDENCE AGAIN TODAY CAUSING TEMPERATURES TO BECOME
HOTTER THAN ON SATURDAY. MAXIMUM TEMPERATURES IN THE LOWER COLUMBIA
BASIN AND ADJACENT VALLEYS AS WELL AS THE BLUE MOUNTAIN FOOTHILLS
AND EASTERN COLUMBIA GORGE WILL REACH OR EXCEED 100 DEGREES TODAY.
THESE SAME AREAS EXCEPT FOR THE EASTERN COLUMBIA GORGE WILL REACH OR
EXCEED 100 DEGREES AGAIN ON MONDAY. AS SUCH A HEAT ADVISORY IS IN
EFFECT FOR THESE AREAS THROUGH MONDAY EVENING EXCEPT FOR THE EASTERN
COLUMBIA GORGE WHICH WILL ONLY CONTINUE FOR TODAY. PLEASE REFER TO
NWS PRODUCT PDXNPWPDT FOR MORE DETAILS.

THERE WILL BE SOME MID LEVEL MOISTURE AND INCREASING INSTABILITY IN
THE SOUTHWEST FLOW WHICH WILL LEAD TO AFTERNOON AND EVENING ISOLATED
THUNDERSTORMS IN CENTRAL AND NORTH CENTRAL OREGON. A FIRE WEATHER
WATCH IS IN EFFECT FOR ABUNDANT LIGHTNING AND DRY FUELS IN CENTRAL
AND NORTH CENTRAL OREGON THAT MAY RESULT FROM THUNDERSTORMS. PLEASE
REFER TO NWS PRODUCT PDXRFWPDT FOR MORE DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

FIRE WEATHER WATCH MONDAY
     NORTH CENTRAL OREGON, CENTRAL OREGON, NORTHERN WHEELER AND
     SOUTHERN GILLIAM COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY
     HIGHLANDS

THUNDERSTORMS MONDAY
     FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON, NORTHWEST BLUE
     MOUNTAINS OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF
     OREGON, NORTH CENTRAL OREGON, LOWER COLUMBIA BASIN OF OREGON,
     GRANDE RONDE VALLEY, WALLOWA COUNTY, FOOTHILLS OF THE BLUE
     MOUNTAINS OF OREGON, NORTHERN BLUE MOUNTAINS OF OREGON,
     SOUTHERN BLUE MOUNTAINS OF OREGON, NORTHERN WHEELER AND
     SOUTHERN GILLIAM COUNTIES, JOHN DAY BASIN, OCHOCO-JOHN DAY
     HIGHLANDS

EXCESSIVE HEAT MONDAY
     KITTITAS VALLEY, YAKIMA VALLEY, LOWER COLUMBIA BASIN OF
     WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON,
     LOWER COLUMBIA BASIN OF OREGON, FOOTHILLS OF THE BLUE
     MOUNTAINS OF OREGON

AFTERNOON AND EVENING THUNDERSTORMS WILL BE POSSIBLE AGAIN ON MONDAY
AND LIKELY LATER INTO THE WEEK AS WELL IN CENTRAL AND NORTH CENTRAL
OREGON. THESE THUNDERSTORMS MAY PRODUCE ABUNDANT LIGHTNING WHICH
COMBINED WITH DRY FUELS WILL RESULT IN CRITICAL FIRE CONDITIONS. AS
SUCH A FIRE WEATHER WATCH WILL BE IN EFFECT AGAIN ON MONDAY FOR
CENTRAL AND NORTH CENTRAL OREGON. PLEASE REFER TO NWS PRODUCT
PDXRFWPDT FOR MORE DETAILS.

AFTERNOON AND EVENING THUNDERSTORMS WILL ALSO BE POSSIBLE IN THE
OCHOCO-JOHN DAY HIGHLANDS...THE JOHN DAY BASIN AND MOST OF EASTERN
AND NORTHEAST OREGON AS WELL AS SOUTHEAST WASHINGTON ON MONDAY AND
LIKELY FURTHER INTO THE WEEK. SOME OF THESE STORMS MAY BECOME STRONG
WITH HAIL...STRONG GUSTY WINDS AND BRIEF HEAVY RAIN.

EXCESSIVE HEAT WILL CONTINUE IN THE LOWER COLUMBIA BASIN...THE BLUE
MOUNTAIN FOOTHILLS AND THE YAKIMA AND KITTITAS VALLEYS AGAIN ON
MONDAY. AS SUCH A HEAT ADVISORY WILL CONTINUE THROUGH MONDAY
EVENING. PLEASE REFER TO NWS PRODUCT ID PDXNPWPDT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:

WWW.WRH.NOAA.GOV/PDT/CURRENTHAZARDS/HWO.HTML

ALL LETTERS IN THE ABOVE URL ARE LOWER CASE.

Nearby

Red Flag Warnings in Washington, 2010Red Flag Warnings in Oregon, 2010Every red flag warning in 2010

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.