Alert archive / Oregon / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Pendleton, OR

May 14, 2011Grant County, Morrow County, Umatilla County, Oregon

NWS Pendleton, OR issued this flash flood warning at May 14, 2011, 4:22 PM PDT for Grant County, Morrow County, Umatilla County, Oregon. It was in force for 5 hr. 5 reports 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 14, 2011, 4:22 PM PDT (23:22 UTC)
Expired: May 14, 2011, 9:10 PM PDT
In force: 5 hr
Issued by: NWS Pendleton, OR
Area: Storm-based polygon
Flood severity: None

Counties Grant County, OR, Morrow County, OR, Umatilla County, OR

The radar

The Pendleton radar (KPDT), 66 km from the middle of the area, began a volume at 23:22 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 14, 4:25 PM PDT	FLASH FLOOD	1 Nnw Heppner, OR	NEIGHBORS GARAGE WAS FLOODED DUE TO THE HEAVY RAIN FROM THUNDERSTORMS.
May 14, 5:00 PM PDT	FLASH FLOOD	Nnw Heppner, OR	RIVERSIDE ROAD IN HEPPNER WAS UNDERWATER. ALSO WATER WAS OVER THE ROAD ALONG HIGHWAY 207 WHICH WAS 3 MILES WEST OF HEPPNER.
May 14, 5:35 PM PDT	FLASH FLOOD	Heppner, OR	RELAYED REPORT FROM THE PUBLIC. SOME BRIDGES ARE COVERED IN WATER AND CREEKS ARE STILL RISING. SANDBAGS ARE BEING USED BY EMERGENCY OFFICIALS IN ATTEMPT TO PROTECT PROPERTIES.
May 14, 7:00 PM PDT	FLOOD	Heppner, OR	HIGHWAY 207 CLOSED BETWEEN LEXINGTON AND HEPPNER DUE TO ROAD FLOODING.
May 14, 8:53 PM PDT	HEAVY RAIN 1.68	N Heppner, OR	TOTAL RAINFALL FOR THIS AFTERNOON TO EARLY EVENING IS 1.68 INCHES. ALSO REPORTED SOME NEIGHBORHOOD HOMES FLOODED BASEMENTS AND ONE HOME STRUCK BY LIGHTNING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salem/Mcnary, OR (KSLE), launched 12:00Z, 11.4 hours before the alert went out and 287 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 638 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 323 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

608 
WGUS56 KPDT 142322
FFWPDT
ORC023-049-059-150215-
/O.NEW.KPDT.FF.W.0002.110514T2322Z-110515T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
422 PM PDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL GRANT COUNTY IN EAST CENTRAL OREGON...
  SOUTHERN MORROW COUNTY IN NORTHEAST OREGON...
  SOUTHWESTERN UMATILLA COUNTY IN NORTHEAST OREGON...

* UNTIL 715 PM PDT

* AT 417 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF AROUND 1 INCH IS POSSIBLE OVER THE 
NEXT HOUR IN WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4550 11949 4540 11915 4514 11892 4496 11903
      4484 11937 4510 11969 4537 11984

$$

RT

3 follow-up statements

240 
WGUS76 KPDT 150026
FFSPDT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
526 PM PDT SAT MAY 14 2011

ORC023-049-059-150215-
/O.CON.KPDT.FF.W.0002.000000T0000Z-110515T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORROW OR-GRANT OR-UMATILLA OR-
526 PM PDT SAT MAY 14 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM PDT FOR NORTH
CENTRAL GRANT COUNTY IN EAST CENTRAL OREGON...AND SOUTHWESTERN
UMATILLA AND SOUTHERN MORROW COUNTIES IN NORTHEAST OREGON...

AT 518 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES OF 
0.75-1.00 INCH OF RAIN HAVE FALLEN DURING THE LAST HOUR. 

ALTHOUGH RAINFALL RATES ARE DECREASING...THERE WILL CONTINUE TO BE 
PERIODS OF HEAVY RAIN THROUGHOUT THE EVENING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RUGGS AND 
HEPPNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM PDT
SATURDAY EVENING FOR NORTHEASTERN OREGON.

&&

LAT...LON 4550 11949 4540 11915 4514 11892 4496 11903
      4484 11937 4510 11969 4537 11984

$$

ML/RT

371 
WGUS56 KPDT 150153
FFWPDT
ORC023-049-059-150415-
/O.EXT.KPDT.FF.W.0002.000000T0000Z-110515T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
653 PM PDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL GRANT COUNTY IN EAST CENTRAL OREGON...
  SOUTHERN MORROW COUNTY IN NORTHEAST OREGON...
  SOUTHWESTERN UMATILLA COUNTY IN NORTHEAST OREGON...

* UNTIL 915 PM PDT

* AT 648 PM PDT...RAPID RUNOFF FROM RECENT THUNDERSTORMS WITH HEAVY 
RAIN WILL CONTINUE OVER THE NEXT 2 HOURS. THIS MAY CAUSE ADDITIONAL 
FLOODING ACROSS THE HEPPNER AREA. 

ALTHOUGH RAIN HAS DIMINISHED...ADDITIONAL LIGHT TO MODERATE RAINFALL 
CAN BE EXPECTED THIS EVENING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4550 11949 4540 11915 4514 11892 4496 11903
      4484 11937 4510 11969 4537 11984

$$

ML/RT

890 
WGUS76 KPDT 150410
FFSPDT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
910 PM PDT SAT MAY 14 2011

ORC023-049-059-150413-
/O.CAN.KPDT.FF.W.0002.000000T0000Z-110515T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORROW OR-GRANT OR-UMATILLA OR-
910 PM PDT SAT MAY 14 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTH CENTRAL GRANT
COUNTY IN EAST CENTRAL OREGON...AND SOUTHWESTERN UMATILLA AND
SOUTHERN MORROW COUNTIES IN NORTHEAST OREGON...

THE AREA OF HEAVY RAIN HAD MOVED NORTH AND AWAY FROM THE REGION. 
SCATTERED SHOWERS WITH ISOLATED THUNDERSTORMS WILL PERSIST TONIGHT. 
HOWEVER THE THREAT FOR FLASH FLOODING HAS DIMINISHED. 

LAT...LON 4550 11949 4540 11915 4514 11892 4496 11903
      4484 11937 4510 11969 4537 11984

$$

VP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 8:43 AM PDT	River Flood Warning	PDT	Wallowa	45 hr
May 14, 12:19 PM PDT	River Flood Warning	PDT	Wallowa	67 hr
May 14, 12:25 PM PDT	Special Weather Statement	PDT	Morrow	65 min
May 14, 12:27 PM PDT	River Flood Warning	PDT	Wheeler	5 days
May 14, 12:45 PM PDT	Severe Thunderstorm Warning	PDT	Morrow, Umatilla	60 min
May 14, 12:48 PM PDT	Special Weather Statement	PDT	Crook	57 min
May 14, 1:20 PM PDT	Areal Flood Warning	PDT	Crook, Deschutes, Gilliam, Grant, Jefferson, Morrow and 6 more	24 hr
May 14, 1:29 PM PDT	Special Weather Statement	PDT	Morrow	61 min
May 14, 1:51 PM PDT	Special Weather Statement	PDT	Wheeler	54 min
May 14, 2:18 PM PDT	Flash Flood Warning	PDT	Morrow	87 min
May 14, 2:38 PM PDT	Special Weather Statement	PDT	Morrow	67 min
May 14, 2:44 PM PDT	Special Weather Statement	PDT	Wheeler	61 min
May 14, 2:49 PM PDT	Special Weather Statement	PDT	Grant	56 min
May 14, 3:35 PM PDT	Special Weather Statement	PDT	Morrow	55 min
May 14, 3:51 PM PDT	Special Weather Statement	PDT	Umatilla	54 min
May 14, 4:33 PM PDT	Special Weather Statement	PDT	Morrow	57 min

Nearby

Flash Flood Warnings in Oregon, 2011 Every flash flood warning in 2011

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.