Alert archive / Washington / Flash Flood Warnings in 2015
Flash Flood Warning 3, NWS Spokane, WA
NWS Spokane, WA issued this flash flood warning at May 28, 2015, 4:58 PM PDT for Okanogan County, Washington. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 28, 2015, 4:58 PM PDT (23:58 UTC)
- Expired
- May 28, 2015, 8:00 PM PDT
- In force
- 3 hr
- Issued by
- NWS Spokane, WA
- Area
- Storm-based polygon
- Flood severity
- None
County Okanogan County, WA
The radar
The Seattle radar (KATX), 185 km from the middle of the area, began a volume at 00:02 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 28, 5:15 PM PDT | FLASH FLOOD | 3 Ese Carlton, WA | EMERGENCY MANAGER REPORTED RAPID RISE ON TEXAS CREEK WHICH CAUSED RESIDENTS OF A HOUSE TO MOVE TO THE ROOF OF THE HOUSE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 12.0 hours before the alert went out and 274 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.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1478 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
310
WGUS56 KOTX 282358
FFWOTX
WAC047-290300-
/O.NEW.KOTX.FF.W.0003.150528T2358Z-150529T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
458 PM PDT THU MAY 28 2015
THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN OKANOGAN COUNTY IN NORTHEASTERN WASHINGTON...
* UNTIL 800 PM PDT
* AT 454 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING OR DEBRIS FLOWS
ARE POSSIBLE SHORTLY. THE DEBRIS FLOW CAN CONSIST OF ROCK...MUD...VEGETATION
AND OTHER LOOSE MATERIALS.
* FLASH FLOODING COULD IMPACT DRAINAGES ALONG HIGHWAY 153 BETWEEN METHOW
AND TWISP IN SOUTHWESTERN OKANOGAN COUNTY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
THE AFFECTED AREAS ARE THE CARLTON COMPLEX FIRE BURN SCARS ABOVE THE
METHOW RIVER VALLEY. HIGH INTENSITY RAINFALL ON THE BURNED AREAS MAY
CAUSE DANGEROUS FLASH FLOODING AND DEBRIS FLOWS. RESIDENTS AND
MOTORISTS IN AND BELOW THE CARLTON COMPLEX FIRE BURN SCAR IN THE
METHOW VALLEY...INCLUDING MOTORISTS ON HIGHWAY 97A FROM CHELAN TO
BREWSTER...AND STATE HIGHWAY 153 FROM PATEROS TO TWISP...SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY.
&&
LAT...LON 4825 11985 4808 12010 4815 12018 4833 11999
$$
SB2 follow-up statements
838 WGUS76 KOTX 290058 FFSOTX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SPOKANE WA 558 PM PDT THU MAY 28 2015 WAC047-290300- /O.CON.KOTX.FF.W.0003.000000T0000Z-150529T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ OKANOGAN WA- 558 PM PDT THU MAY 28 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR SOUTHWESTERN OKANOGAN COUNTY... AT 550 PM PDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING ALONG AND NEAR TEXAS CREEK NEAR HIGHWAY 153 SOUTH OF TWISP AND NORTHWEST OF METHOW. THIS IS WITHIN THE CARLTON COMPLEX BURN SCAR. FLASH FLOODING IS ALREADY OCCURRING WITH SOME RESIDENTS HAVING TO TAKE REFUGE ON ROOFS. EXCESSIVE RAINFALL OVER THE BURN SCAR HAS RESULTED IN DEBRIS FLOW MOVING THROUGH THE TEXAS CREEK DRAINAGE. THE DEBRIS FLOW CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS. LAT...LON 4825 11985 4808 12010 4815 12018 4833 11999 $$ BZ
322 WGUS76 KOTX 290114 FFSOTX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SPOKANE WA 614 PM PDT THU MAY 28 2015 WAC047-290300- /O.CON.KOTX.FF.W.0003.000000T0000Z-150529T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ OKANOGAN WA- 614 PM PDT THU MAY 28 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM PDT FOR SOUTHWESTERN OKANOGAN COUNTY... AT 605 PM PDT...TRAINED WEATHER SPOTTERS REPORTED PONDING OF WATER AND SOME DEBRIS FLOWS ON GRAVEL ROADS. THE REPORT WAS 4 MILES WEST OF THE TOWN OF CARLTON ALONG HIGHWAY 153. THIS FLASH FLOODING IN IS IN THE SAME AREA AS THE TEXAS CREEK DEBRIS FLOW ALONG HIGHWAY 153. PERSONS DOWNSTREAM OF ANY OF THESE DEBRIS FLOWS SHOULD ACT AND PREPARE FOR THESE FLOWS COMING DOWNSTREAM. PERSONS TRAVELING ALONG HIGHWAY 153 BETWEEN METHOW...CARLTON AND TWISP SHOULD PREPARE FOR POSSIBLE ROAD CLOSURES OR WASHOUTS. EXCESSIVE RAINFALL OVER THE CARLTON COMPLEX BURN SCAR WILL RESULT IN DEBRIS FLOWS. THE DEBRIS FLOW CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS. LAT...LON 4825 11985 4808 12010 4815 12018 4833 11999 $$ BZ
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 1:55 PM PDT | Areal Flood Advisory | OTX | Chelan | 2 hr |
| May 28, 4:25 PM PDT | Areal Flood Advisory | OTX | Chelan | 3 hr |
Nearby
Flash Flood Warnings in Washington, 2015Every flash flood warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.