Alert archive / Oregon / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Medford, OR

July 7, 2015Jackson County, Klamath County, Oregon

NWS Medford, OR issued this severe thunderstorm warning at Jul 7, 2015, 2:47 PM PDT for Jackson County, Klamath County, Oregon. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 7, 2015, 2:47 PM PDT (21:47 UTC)
Expired: Jul 7, 2015, 3:15 PM PDT
In force: 28 min
Issued by: NWS Medford, OR
Area: Storm-based polygon

Counties Jackson County, OR, Klamath County, OR

The radar

The Medford radar (KMAX), 32 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 47 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: 4 J/kg
Mixed-layer CIN: -552 J/kg
Mixed-layer LCL: 1433 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 127 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.

407 
WUUS56 KMFR 072147
SVRMFR
ORC029-035-072215-
/O.NEW.KMFR.SV.W.0021.150707T2147Z-150707T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
247 PM PDT TUE JUL 7 2015

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN JACKSON COUNTY IN SOUTHWESTERN OREGON...
  SOUTHWESTERN KLAMATH COUNTY IN SOUTH CENTRAL OREGON...

* UNTIL 315 PM PDT

* AT 246 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED 7 MILES WEST OF KLAMATH RIVER
  CAMPGROUND...OR 25 MILES EAST OF ASHLAND...AND MOVING NORTHWEST AT
  20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SPRING ISLAND BOAT LAUNCH...HOWARD PRAIRIE...HYATT LAKE CAMPGROUND
  AND HOWARD PRAIRIE RECREATION AREA...HIGHWAY 66.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4212 12251 4229 12242 4210 12206 4201 12215
TIME...MOT...LOC 2146Z 124DEG 15KT 4208 12223 

$$

MSC

1 follow-up statement

737 
WWUS56 KMFR 072209
SVSMFR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
309 PM PDT TUE JUL 7 2015

ORC029-035-072218-
/O.EXP.KMFR.SV.W.0021.000000T0000Z-150707T2215Z/
JACKSON OR-KLAMATH OR-
309 PM PDT TUE JUL 7 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JACKSON AND
SOUTHWESTERN KLAMATH COUNTIES WILL EXPIRE AT 315 PM PDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4212 12251 4229 12242 4210 12206 4201 12215
TIME...MOT...LOC 2200Z 124DEG 15KT 4208 12223 

$$

MSC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 5:25 PM PDT	Special Weather Statement	MFR	Josephine	50 min
Jul 6, 6:22 PM PDT	Special Weather Statement	MFR	Deschutes	23 min
Jul 7, 1:05 PM PDT	Special Weather Statement	MFR		25 min
Jul 7, 1:48 PM PDT	Special Weather Statement	MFR		27 min
Jul 7, 1:57 PM PDT	Special Weather Statement	MFR	Klamath	33 min
Jul 7, 2:38 PM PDT	Special Weather Statement	MFR		22 min
Jul 7, 3:06 PM PDT	Severe Thunderstorm Warning	MFR	Klamath	24 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2015 Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.