Alert archive / Oregon / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 9, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Apr 23, 2012, 5:07 PM PDT for Douglas County, Oregon. It was in force for 38 min. 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
- Apr 23, 2012, 5:07 PM PDT (00:07 UTC)
- Expired
- Apr 23, 2012, 5:45 PM PDT
- In force
- 38 min
- Issued by
- NWS Medford, OR
- Area
- Storm-based polygon
County Douglas County, OR
The radar
The Medford radar (KMAX), 105 km from the middle of the area, began a volume at 00:08 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, 5:51 PM PDT | HAIL 0.25 | 10 Nw Tiller, OR | ALSO 0.54 INCH OF RAIN FELL FROM TWO CELLS THAT MOVED THROUGH. 0.38 FROM THE FIRST ONE, 0.26 FROM THE SECOND. |
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 00:00Z, 0.1 hours before the alert went out and 73 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
- 318 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2597 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
303 WUUS56 KMFR 240007 SVRMFR ORC019-240045- /O.NEW.KMFR.SV.W.0009.120424T0007Z-120424T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 507 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... * UNTIL 545 PM PDT * AT 506 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 9 MILES SOUTHEAST OF CANYONVILLE...OR 26 MILES NORTH OF GRANTS PASS...AND MOVING NORTH AT 20 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MYRTLE CREEK LAT...LON 4310 12333 4305 12291 4277 12305 4278 12336 TIME...MOT...LOC 0007Z 199DEG 19KT 4281 12320 $$ SVEN
1 follow-up statement
206 WWUS56 KMFR 240047 SVSMFR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 547 PM PDT MON APR 23 2012 ORC019-240057- /O.EXP.KMFR.SV.W.0009.000000T0000Z-120424T0045Z/ DOUGLAS OR- 547 PM PDT MON APR 23 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL DOUGLAS COUNTY HAS EXPIRED... THE STORM THAT PROMPTED THE WARNING HAS WEAKENED...WITH GUSTY WINDS LESS THAT 50 MPH AND PEA SIZED HAIL STILL POSSIBLE. LAT...LON 4310 12333 4305 12291 4277 12305 4278 12336 TIME...MOT...LOC 0007Z 199DEG 19KT 4281 12320 $$ SVEN
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 2:00 PM PDT | Small Craft Advisory for Winds | MFR | 33 hr | |
| Apr 24, 2:00 PM PDT | Small Craft Advisory for Hazardous Seas | MFR | 33 hr |
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.