Alert archive / California / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 21, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Aug 4, 2014, 8:47 PM PDT for Siskiyou County, California. It was in force for 20 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
- Aug 4, 2014, 8:47 PM PDT (03:47 UTC)
- Expired
- Aug 4, 2014, 9:07 PM PDT
- In force
- 20 min
- Issued by
- NWS Medford, OR
- Area
- Storm-based polygon
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 51 km from the middle of the area, began a volume at 03:49 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 00:00Z, 3.8 hours before the alert went out and 78 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
- 907 J/kg
- Mixed-layer CIN
- -148 J/kg
- Mixed-layer LCL
- 2195 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
778 WUUS56 KMFR 050347 SVRMFR CAC093-050430- /O.NEW.KMFR.SV.W.0021.140805T0347Z-140805T0430Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 847 PM PDT MON AUG 4 2014 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL SISKIYOU COUNTY IN NORTHERN CALIFORNIA... * UNTIL 930 PM PDT * AT 844 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES NORTHWEST OF JUANITA LAKE CAMPGROUND...OR 24 MILES NORTHEAST OF YREKA...AND MOVING SOUTH AT 10 MPH. IN ADDITION...THIS STORM WILL PRODUCE VERY HEAVY RAINFALL. * THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. LAT...LON 4174 12211 4181 12240 4194 12224 4192 12212 TIME...MOT...LOC 0347Z 018DEG 8KT 4187 12221 $$ WRIGHT
1 follow-up statement
152 WWUS56 KMFR 050407 SVSMFR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MEDFORD OR 907 PM PDT MON AUG 4 2014 CAC093-050417- /O.CAN.KMFR.SV.W.0021.000000T0000Z-140805T0430Z/ SISKIYOU CA- 907 PM PDT MON AUG 4 2014 ...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SISKIYOU COUNTY IS CANCELLED... THE THUNDERSTORMS HAS WEAKENED BELOW SEVERE LEVELS...HOWEVER HEAVY RAIN AND OCCASIONAL LIGHTNING WILL CONTINUE OVER THE AREA FOR THE NEXT HALF HOUR. LAT...LON 4174 12211 4181 12240 4194 12224 4192 12212 TIME...MOT...LOC 0407Z 018DEG 8KT 4183 12223 $$ WRIGHT
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:13 PM PDT | Severe Thunderstorm Warning | MFR | Modoc, Siskiyou | 30 min |
| Aug 4, 8:41 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 34 min |
| Aug 5, 4:30 AM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 18 hr |
| Aug 5, 3:56 PM PDT | Special Weather Statement | MFR | Modoc | 49 min |
| Aug 5, 4:27 PM PDT | Special Weather Statement | MFR | Modoc | 48 min |
Nearby
Severe Thunderstorm Warnings in California, 2014Every severe thunderstorm warning in 2014
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.