Alert archive / California / Freeze Warnings in 2013
Freeze Warning 21, NWS Medford, OR
NWS Medford, OR issued this freeze warning at May 30, 2013, 7:41 PM PDT for Modoc County, Siskiyou County, California; Klamath County, Oregon. It took effect at May 31, 2013, 2:00 AM PDT. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 30, 2013, 7:41 PM PDT (02:41 UTC)
- In effect from
- May 31, 2013, 2:00 AM PDT
- Expired
- May 31, 2013, 9:00 AM PDT
- In force
- 7 hr
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Siskiyou County, CA, Klamath County, OR
The radar
The Medford radar (KMAX), 90 km from the middle of the area, began a volume at 02:41 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, 2.7 hours before the alert went out and 106 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
- 2277 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
145 WWUS76 KMFR 310241 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 741 PM PDT THU MAY 30 2013 ...AREAS OF FREEZING TEMPERATURES EXPECTED TONIGHT... .LIGHT WINDS, CLEAR SKIES, AND A DRYING AIRMASS WILL RESULT IN AREAS OF FREEZING TEMPERATURES ON FRIDAY MORNING. CAZ084-ORZ029-311600- /O.NEW.KMFR.FZ.W.0021.130531T0900Z-130531T1600Z/ NORTHEAST SISKIYOU AND NORTHWEST MODOC COUNTIES-KLAMATH BASIN- INCLUDING THE CITY OF...DORRIS 741 PM PDT THU MAY 30 2013 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY. * TEMPERATURES...24 TO 32 DEGREES. * TIMING...BELOW FREEZING TEMPERATURES WILL BE POSSIBLE BETWEEN 2 AM AND 9 AM PDT FRIDAY MORNING. * LOCATIONS INCLUDE: DORRIS...CHILOQUIN...BONANZA...OUTLYING PORTIONS OF THE TULE LAKE BASIN...AND OUTLYING PORTIONS OF KLAMATH FALLS. * IMPACTS...LOW TEMPERATURES ON FRIDAY MORNING WILL BE GENERALLY WITHIN 2 DEGREES OF THOSE OBSERVED ON THURSDAY MORNING. HOWEVER...A STRONGER INVERSION AND DRIER AIR UNDER CLEAR SKIES MEANS THAT THE POSSIBILITY EXISTS FOR TEMPERATURES SLIGHTLY COLDER IN SOME LOW LYING SHELTERED AREAS. THE COLDEST TEMPERATURES ARE LIKELY TO BE IN THE CHILOQUIN AREA...WITH MILDER BUT STILL FREEZING VALUES EXPECTED NEAR KLAMATH FALLS AND PORTIONS OF THE TULE LAKE BASIN. * FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT HTTP://WWW.WRH.NOAA.GOV/WRH/WHV/?WFO=MFR PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ BTL
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 2:22 AM PDT | Small Craft Advisory for Winds | MFR | 12 hr | |
| May 31, 2:22 AM PDT | Small Craft Advisory for Hazardous Seas | MFR | 12 hr | |
| May 31, 2:26 PM PDT | Gale Watch | MFR | 9 hr |
Nearby
Freeze Warnings in California, 2013Freeze Warnings in Oregon, 2013Every freeze warning in 2013
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.