Alert archive / Oregon / Frost Advisories in 2011
Frost Advisory 13, NWS Medford, OR
NWS Medford, OR issued this frost advisory at Apr 29, 2011, 3:14 AM PDT for Curry County, Jackson County, Josephine County, Oregon. It took effect at Apr 30, 2011, 3:00 AM PDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Apr 29, 2011, 3:14 AM PDT (10:14 UTC)
- In effect from
- Apr 30, 2011, 3:00 AM PDT
- Expired
- Apr 30, 2011, 7:41 AM PDT
- In force
- 5 hr
- Issued by
- NWS Medford, OR
Counties Curry County, OR, Jackson County, OR, Josephine County, OR
The radar
The Medford radar (KMAX), 75 km from the middle of the area, began a volume at 10:19 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, 10.2 hours before the alert went out and 58 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
- 6 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 982 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
352 WWUS76 KMFR 291014 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 314 AM PDT FRI APR 29 2011 ...AREAS OF FROST EXPECTED SATURDAY MORNING... .A COLD AIRMASS IN COMBINATION WITH PARTIALLY CLEARING SKIES WILL LEAD TO AREAS OF FROST LATE FRIDAY NIGHT THROUGH MID MORNING SATURDAY. ORZ024-026-292200- /O.NEW.KMFR.FR.Y.0013.110430T0800Z-110430T1600Z/ EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-JACKSON COUNTY- INCLUDING THE CITY OF...ASHLAND 314 AM PDT FRI APR 29 2011 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT SATURDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 1 AM TO 9 AM PDT SATURDAY. * TEMPERATURE: LOW TEMPERATURES WILL FALL TO 32 TO 36 DEGREES AT MOST LOCATIONS IN THE ROGUE...ILLINOIS...AND APPLEGATE VALLEYS. * IMPACTS: COLD SENSITIVE PLANTS SUCH AS SUMMER VEGETABLES COULD BECOME DAMAGED BY FROST IF LEFT UNPROTECTED. * OTHER INFORMATION: A WEAK INVERSION IS LIKELY TO BE PRESENT AT THE TIME OF THE COLDEST TEMPERATURES. THIS MEANS THAT TEMPERATURES ARE LIKELY TO BE A BIT WARMER ABOVE THE SURFACE THAN AT THE SURFACE. ADDITIONALLY...AREAS OF FROST ARE AGAIN EXPECTED LATE SATURDAY NIGHT THROUGH MID MORNING ON SUNDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ LUTZ
4 follow-up statements
582 WWUS76 KMFR 292051 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 151 PM PDT FRI APR 29 2011 ORZ024-026-301600- /O.EXT.KMFR.FR.Y.0013.110430T1000Z-110430T1600Z/ EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-JACKSON COUNTY- INCLUDING THE CITY OF...ASHLAND 151 PM PDT FRI APR 29 2011 ...FROST ADVISORY NOW IN EFFECT FROM 3 AM TO 9 AM PDT SATURDAY... THE FROST ADVISORY IS NOW IN EFFECT FROM 3 AM TO 9 AM PDT SATURDAY. * TEMPERATURE: TEMPERATURES WILL FALL TO 32 TO 36 DEGREES AT LOCATIONS IN THE ROGUE...ILLINOIS...AND APPLEGATE VALLEYS. * IMPACTS: SENSITIVE VEGETATION MAY BE DAMAGED IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$
921 WWUS76 KMFR 301021 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 321 AM PDT SAT APR 30 2011 CAZ080-302200- /O.NEW.KMFR.FZ.W.0015.110501T0900Z-110501T1600Z/ /O.NEW.KMFR.FR.Y.0014.110501T0900Z-110501T1600Z/ WESTERN SISKIYOU COUNTY- INCLUDING THE CITIES OF...ETNA...FORT JONES...GREENVIEW 321 AM PDT SAT APR 30 2011 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. A FROST ADVISORY HAS ALSO BEEN ISSUED. THIS FROST ADVISORY IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: LOW TEMPERATURES ON SUNDAY MORNING ARE EXPECTED TO BE IN THE 28 TO 32 DEGREE RANGE FROM HAPPY CAMP AND SAWYERS BAR EASTWARD IN THE VALLEYS OF WESTERN SISKIYOU COUNTY...TO INCLUDE THE SCOTT VALLEY. SOUTH OF HAPPY CAMP TO SOMES BAR TEMPERATURES ARE EXPECTED TO RANGE BETWEEN 33 AND 36 DEGREES. * IMPACTS: AREAS OF FROST ARE EXPECTED TO FORM IN THE VALLEYS ACROSS THE ENTIRE MENTIONED AREA. FROM HAPPY CAMP AND SAWYERS BAR EASTWARD...TO INCLUDE THE SCOTT VALLEY...A FREEZE IS EXPECTED. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$ CAZ081-302200- /O.NEW.KMFR.FZ.W.0015.110501T0900Z-110501T1600Z/ CENTRAL SISKIYOU COUNTY- INCLUDING THE CITIES OF...YREKA...WEED 321 AM PDT SAT APR 30 2011 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: LOW TEMPERATURES ON SUNDAY MORNING ARE EXPECTED TO BE IN THE 27 TO 31 DEGREE RANGE IN THE SHASTA VALLEY. * IMPACTS: AREAS OF FROST AS WELL AS A FREEZE ARE LIKELY IN THE SHASTA VALLEY SUNDAY MORNING. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ ORZ024-026-302200- /O.NEW.KMFR.FR.Y.0014.110501T0900Z-110501T1600Z/ /O.CON.KMFR.FR.Y.0013.000000T0000Z-110430T1600Z/ EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-JACKSON COUNTY- INCLUDING THE CITIES OF...GRANTS PASS...MEDFORD...ASHLAND 321 AM PDT SAT APR 30 2011 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. A FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING. * TEMPERATURE: TEMPERATURES WILL FALL TO 32 TO 36 DEGREES AT MOST LOCATIONS IN THE ROGUE...ILLINOIS...AND APPLEGATE VALLEYS. SOME OF THE USUALLY COLDER OUTLYING VALLEY AREAS IN THE APPLEGATE SHELTERED FROM EAST WIND COULD BRIEFLY DROP TO 30 TO 32 DEGREES. * IMPACTS: SENSITIVE VEGETATION MAY BE DAMAGED IF LEFT UNPROTECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$ LUTZ
829 WWUS76 KMFR 301026 CCA NPWMFR URGENT - WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE MEDFORD OR 321 AM PDT SAT APR 30 2011 CAZ080-302200- /O.NEW.KMFR.FZ.W.0015.110501T0900Z-110501T1600Z/ /O.NEW.KMFR.FR.Y.0014.110501T0900Z-110501T1600Z/ WESTERN SISKIYOU COUNTY- INCLUDING THE CITIES OF...ETNA...FORT JONES...GREENVIEW 321 AM PDT SAT APR 30 2011 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. A FROST ADVISORY HAS ALSO BEEN ISSUED. THIS FROST ADVISORY IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: LOW TEMPERATURES ON SUNDAY MORNING ARE EXPECTED TO BE IN THE 28 TO 32 DEGREE RANGE FROM HAPPY CAMP AND SAWYERS BAR EASTWARD IN THE VALLEYS OF WESTERN SISKIYOU COUNTY...TO INCLUDE THE SCOTT VALLEY. SOUTH OF HAPPY CAMP TO SOMES BAR TEMPERATURES ARE EXPECTED TO RANGE BETWEEN 33 AND 36 DEGREES. * IMPACTS: AREAS OF FROST ARE EXPECTED TO FORM IN THE VALLEYS ACROSS THE ENTIRE MENTIONED AREA. FROM HAPPY CAMP AND SAWYERS BAR EASTWARD...TO INCLUDE THE SCOTT VALLEY...A FREEZE IS EXPECTED. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$ CAZ081-302200- /O.NEW.KMFR.FZ.W.0015.110501T0900Z-110501T1600Z/ CENTRAL SISKIYOU COUNTY- INCLUDING THE CITIES OF...YREKA...WEED 321 AM PDT SAT APR 30 2011 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: LOW TEMPERATURES ON SUNDAY MORNING ARE EXPECTED TO BE IN THE 27 TO 31 DEGREE RANGE IN THE SHASTA VALLEY. * IMPACTS: AREAS OF FROST AS WELL AS A FREEZE ARE LIKELY IN THE SHASTA VALLEY SUNDAY MORNING. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ ORZ024-026-302200- /O.COR.KMFR.FR.Y.0014.110501T0900Z-110501T1600Z/ /O.COR.KMFR.FR.Y.0013.000000T0000Z-110430T1600Z/ EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-JACKSON COUNTY- INCLUDING THE CITIES OF...GRANTS PASS...MEDFORD...ASHLAND 321 AM PDT SAT APR 30 2011 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. A FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING. * TEMPERATURE: TEMPERATURES WILL FALL TO 32 TO 36 DEGREES AT MOST LOCATIONS IN THE ROGUE...ILLINOIS...AND APPLEGATE VALLEYS. SOME OF THE USUALLY COLDER OUTLYING VALLEY AREAS IN THE APPLEGATE SHELTERED FROM EAST WIND COULD BRIEFLY DROP TO 30 TO 32 DEGREES. * IMPACTS: SENSITIVE VEGETATION MAY BE DAMAGED IF LEFT UNPROTECTED. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$ LUTZ
287 WWUS76 KMFR 301441 NPWMFR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 741 AM PDT SAT APR 30 2011 ORZ024-026-302300- /O.CAN.KMFR.FR.Y.0013.000000T0000Z-110430T1600Z/ /O.CON.KMFR.FR.Y.0014.110501T0900Z-110501T1600Z/ EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-JACKSON COUNTY- INCLUDING THE CITIES OF...GRANTS PASS...MEDFORD...ASHLAND 741 AM PDT SAT APR 30 2011 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... ...FROST ADVISORY IS CANCELLED FOR THIS MORNING... THE NATIONAL WEATHER SERVICE IN MEDFORD HAS CANCELLED THE FROST ADVISORY. A FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: TEMPERATURES WILL FALL TO 32 TO 36 DEGREES AT MOST LOCATIONS IN THE ROGUE...ILLINOIS...AND APPLEGATE VALLEYS. SOME OF THE USUALLY COLDER OUTLYING VALLEY AREAS IN THE APPLEGATE SHELTERED FROM EAST WIND COULD BRIEFLY DROP TO 30 TO 32 DEGREES. * IMPACTS: SENSITIVE VEGETATION MAY BE DAMAGED IF LEFT UNPROTECTED. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ CAZ080-302300- /O.CON.KMFR.FZ.W.0015.110501T0900Z-110501T1600Z/ /O.CON.KMFR.FR.Y.0014.110501T0900Z-110501T1600Z/ WESTERN SISKIYOU COUNTY- INCLUDING THE CITIES OF...ETNA...FORT JONES...GREENVIEW 741 AM PDT SAT APR 30 2011 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... A FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. A FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: LOW TEMPERATURES ON SUNDAY MORNING ARE EXPECTED TO BE IN THE 28 TO 32 DEGREE RANGE FROM HAPPY CAMP AND SAWYERS BAR EASTWARD IN THE VALLEYS OF WESTERN SISKIYOU COUNTY...TO INCLUDE THE SCOTT VALLEY. SOUTH OF HAPPY CAMP TO SOMES BAR TEMPERATURES ARE EXPECTED TO RANGE BETWEEN 33 AND 36 DEGREES. * IMPACTS: AREAS OF FROST ARE EXPECTED TO FORM IN THE VALLEYS ACROSS THE ENTIRE MENTIONED AREA. FROM HAPPY CAMP AND SAWYERS BAR EASTWARD...TO INCLUDE THE SCOTT VALLEY...A FREEZE IS EXPECTED. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE DAMAGED IF LEFT UNCOVERED. && $$ CAZ081-302300- /O.CON.KMFR.FZ.W.0015.110501T0900Z-110501T1600Z/ CENTRAL SISKIYOU COUNTY- INCLUDING THE CITIES OF...YREKA...WEED 741 AM PDT SAT APR 30 2011 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY... A FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT SUNDAY. * TEMPERATURE: LOW TEMPERATURES ON SUNDAY MORNING ARE EXPECTED TO BE IN THE 27 TO 31 DEGREE RANGE IN THE SHASTA VALLEY. * IMPACTS: AREAS OF FROST AS WELL AS A FREEZE ARE LIKELY IN THE SHASTA VALLEY SUNDAY MORNING. AN INVERSION IN PLACE WILL RESULT IN WARMER TEMPERATURES ABOVE THE VALLEY FLOORS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 2:59 AM PDT | Small Craft Advisory for Winds | MFR | 38 hr | |
| Apr 29, 3:09 PM PDT | Gale Warning | MFR | 32 hr | |
| Apr 29, 3:09 PM PDT | Hazardous Seas Warning | MFR | 32 hr | |
| Apr 29, 3:09 PM PDT | Small Craft Advisory for Winds | MFR | 32 hr | |
| Apr 29, 3:09 PM PDT | Small Craft Advisory for Hazardous Seas | MFR | 32 hr |
Nearby
Frost Advisories in Oregon, 2011Every frost advisory in 2011
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.