Alert archive / California / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 21, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Jun 25, 2017, 5:03 PM PDT for Siskiyou County, California. It was in force for 27 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
- Jun 25, 2017, 5:03 PM PDT (00:03 UTC)
- Expired
- Jun 25, 2017, 5:30 PM PDT
- In force
- 27 min
- Issued by
- NWS Medford, OR
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 53 km from the middle of the area, began a volume at 00:04 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, 0.1 hours before the alert went out and 86 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
- 715 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 3070 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
645 WUUS56 KMFR 260003 SVRMFR CAC093-260030- /O.NEW.KMFR.SV.W.0021.170626T0003Z-170626T0030Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Medford OR 503 PM PDT SUN JUN 25 2017 The National Weather Service in Medford has issued a * Severe Thunderstorm Warning for... Central Siskiyou County in northern California... * Until 530 PM PDT * At 502 PM PDT, a severe thunderstorm was located over Grenada, or 9 miles southeast of Yreka, moving north at 5 mph. HAZARD...Quarter size hail and strong gusty winds. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include...Interstate 5 between Montague and Grenada. # PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4154 12251 4157 12259 4176 12257 4172 12239 TIME...MOT...LOC 0002Z 200DEG 5KT 4162 12253 HAIL...1.00IN WIND...<50MPH $$ BPN
2 follow-up statements
317 WWUS56 KMFR 260019 SVSMFR Severe Weather Statement National Weather Service Medford OR 519 PM PDT SUN JUN 25 2017 CAC093-260030- /O.CON.KMFR.SV.W.0021.000000T0000Z-170626T0030Z/ Siskiyou CA- 519 PM PDT SUN JUN 25 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM PDT FOR CENTRAL SISKIYOU COUNTY... At 518 PM PDT, a severe thunderstorm was located over Grenada, or 8 miles southeast of Yreka, moving north at 5 mph. HAZARD...Quarter size hail and gusty winds. SOURCE...Radar indicated. IMPACT...Damage to vehicles and agriculture is possible. Locations impacted include... Montague and Grenada. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4154 12251 4157 12259 4176 12257 4172 12239 TIME...MOT...LOC 0018Z 200DEG 5KT 4164 12252 HAIL...1.00IN WIND...<50MPH $$ BPN
754
WWUS56 KMFR 260028
SVSMFR
Severe Weather Statement
National Weather Service Medford OR
528 PM PDT SUN JUN 25 2017
CAC093-260038-
/O.EXP.KMFR.SV.W.0021.000000T0000Z-170626T0030Z/
Siskiyou CA-
528 PM PDT SUN JUN 25 2017
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SISKIYOU COUNTY WILL
EXPIRE AT 530 PM PDT...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.
LAT...LON 4154 12251 4157 12259 4176 12257 4172 12239
TIME...MOT...LOC 0028Z 200DEG 5KT 4165 12251
$$
BPNThe office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 5:01 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 29 min |
| Jun 25, 5:34 PM PDT | Flash Flood Warning | MFR | Siskiyou | 86 min |
| Jun 25, 6:02 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 43 min |
| Jun 25, 6:22 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 38 min |
Nearby
Severe Thunderstorm Warnings in California, 2017Every severe thunderstorm warning in 2017
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.