Alert archive / Oregon / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 8, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Apr 23, 2012, 4:31 PM PDT for Douglas County, Jackson County, Josephine County, 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
- Apr 23, 2012, 4:31 PM PDT (23:31 UTC)
- Expired
- Apr 23, 2012, 5:00 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
The radar
The Medford radar (KMAX), 77 km from the middle of the area, began a volume at 23:34 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 |
|---|---|---|---|
| Apr 23, 4:43 PM PDT | HAIL 0.5 | 10 Ne Grants Pass, OR | STRONG WINDS AND HEAVY RAIN |
| Apr 23, 4:45 PM PDT | TSTM WND DMG | 9 N Rogue River, OR | .5 HAIL, 2 DIAMETER BRANCHES BROKEN, WIDESPREAD BRANCH DEBRIS. REPORTED BY SPOTTER JA98 |
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, 11.5 hours before the alert went out and 48 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1383 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
001 WUUS56 KMFR 232331 SVRMFR ORC019-029-033-240000- /O.NEW.KMFR.SV.W.0008.120423T2331Z-120424T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 431 PM PDT MON APR 23 2012 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL DOUGLAS COUNTY IN SOUTHWEST OREGON... WEST CENTRAL JACKSON COUNTY IN SOUTHWEST OREGON... NORTHEASTERN JOSEPHINE COUNTY IN SOUTHWEST OREGON... THIS INCLUDES THE CITY OF GRANTS PASS... * UNTIL 500 PM PDT * AT 430 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ROGUE RIVER...OR 7 MILES NORTHEAST OF GRANTS PASS...AND MOVING NORTH AT 30 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUNNY VALLEY AND ELDERBERRY FLAT CAMPGROUND LAT...LON 4284 12338 4282 12298 4238 12306 4240 12338 TIME...MOT...LOC 2331Z 189DEG 27KT 4251 12320 $$ SVEN
1 follow-up statement
417 WWUS56 KMFR 232358 SVSMFR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 458 PM PDT MON APR 23 2012 ORC019-029-033-240007- /O.EXP.KMFR.SV.W.0008.000000T0000Z-120424T0000Z/ DOUGLAS OR-JACKSON OR-JOSEPHINE OR- 458 PM PDT MON APR 23 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JOSEPHINE...WEST CENTRAL JACKSON AND SOUTH CENTRAL DOUGLAS COUNTIES WILL EXPIRE AT 500 PM PDT... THE STORM THAT PROMPTED THE WARNING HAS WEAKENED...WITH GUSTY WINDS LESS THAT 50 MPH AND PEA SIZED HAIL STILL POSSIBLE. LAT...LON 4284 12338 4282 12298 4238 12306 4240 12338 TIME...MOT...LOC 2357Z 189DEG 27KT 4270 12316 $$ SVEN
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 2:20 PM PDT | Severe Thunderstorm Warning | MFR | Lake | 40 min |
| Apr 23, 4:12 PM PDT | Severe Thunderstorm Warning | MFR | Douglas | 48 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 2012Every severe thunderstorm warning in 2012
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.