Alert archive / Washington / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 15, NWS Pendleton, OR

August 11, 2013Columbia County, Washington

NWS Pendleton, OR issued this severe thunderstorm warning at Aug 11, 2013, 5:04 PM PDT for Columbia County, Washington. 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 counties it named.

The facts

Issued
Aug 11, 2013, 5:04 PM PDT (00:04 UTC)
Expired
Aug 11, 2013, 6:00 PM PDT
In force
56 min
Issued by
NWS Pendleton, OR
Area
Storm-based polygon

County Columbia County, WA

The radar

The Pendleton radar (KPDT), 99 km from the middle of the area, began a volume at 00:04 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

Spokane, WA (KOTX), launched 00:00Z, 0.1 hours before the alert went out and 193 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, Spokane, WA at 00:00Z on 2013-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1096 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, Spokane, WA at 00:00Z on 2013-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
1096 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
2286 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 11, 2:30 PM PDT, 2 hours 34 minutes earlier.

Area forecast discussion, Aug 11, 2:30 PM PDT, 2 hours 34 minutes before
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Hazardous weather outlook, Aug 11, 5:17 AM PDT, 11 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
517 AM PDT SUN AUG 11 2013

ORZ041-042-044-049-050-502-503-505>509-WAZ024-026>030-520-521-
121230-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-WALLOWA COUNTY-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-JOHN DAY BASIN-OCHOCO-
JOHN DAY HIGHLANDS-
FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-
FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON-
EAST SLOPES OF THE OREGON CASCADES-
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 WASHINGTON CASCADES-SIMCOE HIGHLANDS-
517 AM PDT SUN AUG 11 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
OREGON...NORTH CENTRAL OREGON...NORTHEAST OREGON...CENTRAL
WASHINGTON...SOUTH WASHINGTON...SOUTH CENTRAL WASHINGTON AND
SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS TODAY ACROSS ALL AREAS BECOMING SCATTERED
BY THIS AFTERNOON. THUNDERSTORMS MAY PRODUCE HEAVY RAIN...FREQUENT
LIGHTNING...GUSTY WINDS...AND HAIL. SPC HAS A 5 PERCENT RISK FOR
STRONG WINDS AND LARGE HAIL FOR ALL AREAS EXCEPT THE EAST SLOPES
OF THE OREGON CASCADES TODAY.

RED FLAG WARNINGS REMAIN IN EFFECT FOR ABUNDANT LIGHTNING COMBINED
WITH CRITICALLY DRIED FUELS FOR ALL FIRE WEATHER ZONES. PLEASE REFER
TO PDXRFWPDT FOR FURTHER DETAILS.

A FLASH FLOOD WATCH FOR PORTIONS OF SOUTH AND CENTRAL WASHINGTON
REMAINS IN EFFECT THROUGH 11PM THIS EVENING. PLEASE REFER TO
PRODUCT PDXFFAPDT FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SOUTHWEST FLOW WILL CONTINUE TO PROVIDE A CHANCE FOR
THUNDERSTORMS...MAINLY ALONG THE MOUNTAINS OF NORTHEAST OREGON.
THE SPC THREAT FOR MONDAY REMAINS IN THE 5 PERCENT CATEGORY FOR
STRONG WINDS AND LARGE HAIL.

In the hours before

Local storm report, Aug 11, 11:22 AM PDT, 5 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE PENDLETON OR
1122 AM PDT SUN AUG 11 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0519 PM     HAIL             6 E CONDON              45.24N 120.06W
08/10/2013  E0.50 INCH       GILLIAM            OR   PUBLIC

            MARBLE SIZED HAIL FELL DURING PEAK OF STORM IN AREA.

0521 PM     HAIL             SSE EASTON              47.23N 121.18W
08/10/2013  E0.50 INCH       KITTITAS           WA   TRAINED SPOTTER

            THUNDERSTORM WITH GUSTY WINDS OF UP TO 30 KTS WITH 1/2
            INCH ESTIMATED SIZED HAIL REPORTED.

0548 PM     HAIL             WNW UNION               45.21N 117.88W
08/10/2013  E1.00 INCH       UNION              OR   TRAINED SPOTTER

0548 PM     HAIL             ESE UNION               45.21N 117.86W
08/10/2013  E0.50 INCH       UNION              OR   TRAINED SPOTTER

            STORM PASSED WITH LITTLE RAIN BUT WITH HALF-INCH
            ESTIMATED HAIL SIZE.

0550 PM     HAIL             ESE UNION               45.21N 117.86W
08/10/2013  E1.00 INCH       UNION              OR   TRAINED SPOTTER

0555 PM     HAIL             UNION                   45.21N 117.87W
08/10/2013  E1.50 INCH       UNION              OR   PUBLIC

            ESTIMATED ONE AND ONE-HALF INCH SIZED HAIL WITH PROPERTY
            DAMAGE TO PATIO ROOF.

0556 PM     HAIL             UNION                   45.21N 117.87W
08/10/2013  E1.75 INCH       UNION              OR   PUBLIC

0602 PM     HAIL             UNION                   45.21N 117.87W
08/10/2013  E1.00 INCH       UNION              OR   TRAINED SPOTTER

0604 PM     HAIL             COVE                    45.30N 117.81W
08/10/2013  E1.00 INCH       UNION              OR   TRAINED SPOTTER

0613 PM     HAIL             UNION                   45.21N 117.87W
08/10/2013  E1.00 INCH       UNION              OR   PUBLIC

            ESTIMATED QUARTER SIZE HAIL CAUSING PROPERTY DAMAGE.

0645 PM     TSTM WND GST     MINAM                   45.62N 117.72W
08/10/2013  E45.00 MPH       WALLOWA            OR   PUBLIC

            STRONG GUSTY WINDS BLOWING INTO THUNDERSTORM, ESTIMATED
            45 MPH.

0703 PM     LIGHTNING        SW MITCHELL             44.56N 120.15W
08/10/2013                   WHEELER            OR   TRAINED SPOTTER

            FREQUENT LIGHTNING WITH HEAVY RAINFALL ASSOCIATED WITH
            STORM.

0722 PM     LIGHTNING        2 NW WAITSBURG          46.29N 118.18W
08/10/2013                   WALLA WALLA        WA   AMATEUR RADIO

            AN AMATEUR RADIO OPERATOR WORKING AT THE TABLE ROCK FIRE
            LOOKOUT LOCATED 20 MILES EAST OF WALLA WALLA AT AN
            ELEVATION OF 6300 FEET REPORTED SEEING A LIGHTNING STRIKE
            STARTING A FIRE IN A WHEAT FIELD JUST NORTHWEST OF
            WAITSBURG.

0854 PM     HAIL             10 SSE MAUPIN           45.04N 120.99W
08/10/2013  E1.00 INCH       WASCO              OR   TRAINED SPOTTER

            DIME SIZE HAIL AND BIGGER UP TO QUARTER SIZE HAIL.

&&

SUMMARY OF SATURDAY'S STORM REPORTS

POLAN
Special weather statement, Aug 11, 12:37 PM PDT, 4 hours 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
1237 PM PDT SUN AUG 11 2013

WAZ520-112030-
EAST SLOPES OF THE WASHINGTON CASCADES WA-
1237 PM PDT SUN AUG 11 2013

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN KITTITAS AND NORTHWESTERN
YAKIMA COUNTIES UNTIL 130 PM PDT...

AT 1230 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR GOOSE PRAIRIE...OR 36 MILES SOUTHEAST OF
ENUMCLAW...MOVING NORTH AT 20 MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4735 12087 4650 12102 4658 12141 4668 12142
      4671 12137 4677 12146 4691 12151 4705 12139
      4712 12141 4715 12138 4715 12131 4721 12132
      4723 12137 4727 12134 4729 12144 4735 12147
      4741 12143
TIME...MOT...LOC 1937Z 185DEG 16KT 4697 12133
Local storm report, Aug 11, 1:50 PM PDT, 3 hours 14 minutes before
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Special weather statement, Aug 11, 1:58 PM PDT, 3 hours 6 minutes before
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Local storm report, Aug 11, 4:06 PM PDT, 58 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 5:15 AM PDTRed Flag WarningPDT24 hr
Aug 12, 2:43 PM PDTSpecial Weather StatementPDTUnion47 min

Nearby

Severe Thunderstorm Warnings in Washington, 2013Every severe thunderstorm warning in 2013

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.