Alert archive / Oregon / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 2, NWS Medford, OR

March 13, 20114 counties in Oregon

NWS Medford, OR issued this severe thunderstorm warning at Mar 13, 2011, 2:46 PM PDT for 4 counties in Oregon. It was in force for 29 min. 2 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: Mar 13, 2011, 2:46 PM PDT (21:46 UTC)
Expired: Mar 13, 2011, 3:15 PM PDT
In force: 29 min
Issued by: NWS Medford, OR
Area: Storm-based polygon

Counties Douglas County, OR, Jackson County, OR, Josephine County, OR, Klamath County, OR

The radar

The Medford radar (KMAX), 134 km from the middle of the area, began a volume at 21:46 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
Mar 13, 3:18 PM PDT	TSTM WND DMG	2 E Obrien, OR	TREE DOWNED ON HIGHWAY 199 NEAR OBRIEN. THE ROAD IS CLOSED.
Mar 13, 3:18 PM PDT	TSTM WND GST 52	9 S Ashland, OR	MEASURED WIND ON AUTOMATED SENSOR AT THE LODGE.

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

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 9.8 hours before the alert went out and 103 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: 1267 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 135 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.

644 
WUUS56 KMFR 132146
SVRMFR
ORC019-029-033-035-132215-
/O.NEW.KMFR.SV.W.0002.110313T2146Z-110313T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
246 PM PDT SUN MAR 13 2011

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN KLAMATH COUNTY IN SOUTH CENTRAL OREGON...
  THIS INCLUDES THE CITY OF CRATER LAKE...
  EASTERN DOUGLAS COUNTY IN SOUTHWEST OREGON...
  JACKSON COUNTY IN SOUTHWEST OREGON...
  THIS INCLUDES THE CITIES OF...MEDFORD...ASHLAND...
  EASTERN JOSEPHINE COUNTY IN SOUTHWEST OREGON...
  THIS INCLUDES THE CITIES OF...GRANTS PASS...CAVE JUNCTION...

* UNTIL 315 PM PDT

* AT 236 PM PDT...DOPPLER RADAR AND TRAINED WEATHER SPOTTERS 
  REPORTED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 26 MILES NORTHWEST OF STEAMBOAT TO 79
  MILES SOUTH OF TAKILMA...OR ALONG A LINE EXTENDING FROM 25 MILES
  NORTHEAST OF SUTHERLIN TO 13 MILES SOUTHWEST OF HOOPA...AND MOVING
  NORTHEAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WILLIAMS...ROGUE RIVER...APPLEGATE...TILLER...GOLD HILL...RUCH...
  JACKSONVILLE...CENTRAL POINT...SHADY COVE...UNION CREEK...TOKETEE
  FALLS...TALENT...SISKIYOU SUMMIT...PROSPECT...HOWARD PRAIRIE...
  EAGLE POINT...DIAMOND LAKE...CRESCENT LAKE...BUTTE FALLS AND WHITE
  CITY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

DAMAGING WINDS UP TO 60 MPH WERE REPORTED IN ROSEBURG. LARGE HAIL 
WAS REPORTED IN MERLIN. THIS IS A DANGEROUS LINE OF STORMS...SEEK
SAFE SHELTER AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4354 12309 4354 12275 4344 12272 4344 12217
      4349 12212 4351 12214 4358 12209 4362 12190
      4202 12213 4202 12371 4368 12314
TIME...MOT...LOC 2144Z 238DEG 53KT 4373 12285 4099 12372

$$

JRS

1 follow-up statement

251 
WWUS56 KMFR 132215
SVSMFR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
315 PM PDT SUN MAR 13 2011

ORC019-029-033-035-132225-
/O.EXP.KMFR.SV.W.0002.000000T0000Z-110313T2215Z/
KLAMATH OR-JACKSON OR-JOSEPHINE OR-DOUGLAS OR-
315 PM PDT SUN MAR 13 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DOUGLAS...EASTERN
JOSEPHINE...JACKSON AND WESTERN KLAMATH COUNTIES WILL EXPIRE AT 315
PM PDT...

THE SEVERE THUNDESTORM WARNING HAS EXPIRED...BUT GUSTY WINDS 30 TO 
50 MPH AND SMALL HAIL ARE STILL EXPECTED WITH THIS LINE OF 
THUNDERSTORMS AS IT MOVES INTO THE CASCADES.  

LAT...LON 4354 12309 4354 12275 4344 12272 4344 12217
      4349 12212 4351 12214 4358 12209 4362 12190
      4202 12213 4202 12371 4368 12314
TIME...MOT...LOC 2213Z 238DEG 53KT 4386 12222 4115 12324

$$

JRS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 3:33 AM PDT	Storm Warning	MFR		13 hr
Mar 13, 4:18 AM PDT	High Surf Advisory	MFR	Coos, Curry, Douglas	8 hr
Mar 13, 12:24 PM PDT	Special Marine Warning	MFR		36 min
Mar 13, 12:29 PM PDT	High Surf Advisory	MFR	Coos, Curry, Douglas	39 hr
Mar 13, 1:09 PM PDT	Special Marine Warning	MFR		36 min
Mar 13, 2:27 PM PDT	Severe Thunderstorm Warning	MFR	Coos, Curry, Douglas, Jackson, Josephine	25 min
Mar 13, 4:58 PM PDT	Small Craft Advisory for Winds	MFR		28 hr

Nearby

Severe Thunderstorm Warnings in Oregon, 2011 Every severe thunderstorm 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.