Alert archive / California / Heat Advisories in 2013
Heat Advisory 2, NWS San Diego, CA
NWS San Diego, CA issued this heat advisory at Sep 5, 2013, 12:51 PM PDT for Riverside County, San Bernardino County, San Diego County, California. It took effect at Sep 5, 2013, 1:00 PM PDT. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- Sep 5, 2013, 12:51 PM PDT (19:51 UTC)
- In effect from
- Sep 5, 2013, 1:00 PM PDT
- Expired
- Sep 6, 2013, 7:00 PM PDT
- In force
- 30 hr
- Issued by
- NWS San Diego, CA
Counties Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 122 km from the middle of the area, began a volume at 19:54 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
San Diego, CA (KNKX), launched 12:00Z, 7.9 hours before the alert went out and 145 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
- 2097 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before this heat advisory went out at Sep 5, 9:37 AM PDT, 3 hours 14 minutes earlier.
Area forecast discussion, Sep 5, 9:37 AM PDT, 3 hours 14 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 937 AM PDT THU SEP 5 2013 .SYNOPSIS... HOT AND MUGGY CONDITIONS WILL PREVAIL ACROSS SOUTHERN CALIFORNIA THROUGH SATURDAY...AS HIGH PRESSURE REMAINS ENTRENCHED OVER THE DESERT SOUTHWEST. A SHALLOW MARINE LAYER WILL HELP MODERATE TEMPERATURES ALONG THE COAST THOUGH. SUBTROPICAL MOISTURE WILL ALSO CONTINUE TO BRING THE THREAT OF AFTERNOON SHOWERS AND THUNDERSTORMS OVER THE MOUNTAINS AND DESERTS...EVEN ONCE COOLER CONDITION DEVELOP NEXT WEEK. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... TODAY... AS FOR THUNDERSTORM THREAT...SOUNDINGS LOOK A BIT DRIER AND PRECIPITABLE WATER IS GENERALLY BELOW 1.3 INCHES. TRANSPORT WINDS ARE CURRENTLY SOUTHERLY BUT PROGGED TO BE SOUTHWESTERLY THIS AFTERNOON. THIS SHOULD KEEP THUNDERSTORMS FROM MOVING WEST OF THE MOUNTAINS. STABILITY PARAMETERS ARE ABOUT THE SAME THOUGH CAPE VALUES ARE ABOUT HALF. TRIGGER TEMPS OVER DESERT VALLEY FLOORS AND EASTERN SLOPES SHOULD BE REACHED BY 1000 AM AND CONVECTIVE TEMPERATURES BY NOON. BASED ON MODEL SOUNDINGS TEMPERATURES SHOULD BE 1 TO 2 DEGREES WARMER THAN YESTERDAY MOST AREAS. FRIDAY THROUGH SUNDAY... SLOW COOLING AND DRYING TREND AS HIGH PRESSURE RIDGE RETREATS AND AXIS OF WEAK UPPER TROUGH...CURRENTLY ALONG 130W SHIFTS EAST TO 120W. NOT EXPECTING ANY SIGNIFICANT DEEPENING OF MARINE LAYER...BUT STRATUS CLOUDS WILL LIKELY FORM A FEW MILES INLAND. THUNDERSTORM THREAT NOT ENTIRELY ELIMINATED OVER MOUNTAINS/DESERTS. MONDAY AND TUESDAY... MODELS IN FAIR AGREEMENT ABOUT TROUGH PINCHING OFF INTO A LOW. THICKNESS FALLS ARE ABOUT 40 METERS AND WILL PROBABLY ENTRAIN LOTS OF MID AND HIGH CLOUDS FROM SUBTROPICS SO AN AREA WIDE COOLING OF 5 TO 10 DEGREES LIKELY...PLUS MARINE AIR SHOULD BE TRANSPORTED FURTHER INLAND AND TO A DEEPER DEPTH...BUT STRATUS FIELD NOT LIKELY TO BE MORE THAN BROKEN WITH CLEARING FAIRLY EARLY EACH MORNING. AFTER TUESDAY MODELS ARE OUT OF PHASE WITH NO AGREEMENT ON SYNOPTIC PATTERN. FOR NOW PERSISTENCE IS BEST FORECAST...KEEP THE UPPER LOW STATIONARY AND SHOW LITTLE CHANGE IN DAY TO DAY WEATHER. && .AVIATION... 051525Z...COAST/VALLEYS...A PATCH OF SCT CLDS WITH BASES 600-700 FT MSL ALONG THE SOUTH-CENTRAL SAN DIEGO COUNTY COAST WILL CLEAR OUT THROUGH 1800 UTC. DURING 1900-06/0300 UTC TIME-PERIOD...THUNDERSTORMS OVER MTNS WILL PRODUCE SCT-FEW DEBRIS CLDS AOA 9000 FT MSL. SLIGHT CHANCE OF FOG REACHING KSAN...KCRQ...AND/OR KSNA DURING THE 06/1100-1500 UTC TIME-FRAME...BUT ONCE AGAIN...CONFIDENCE IS LOW IN THIS OCCURRING. OTHERWISE...UNRESTRICTED VIS AND MOSTLY SKC THROUGH FRIDAY MORNING. MTNS/DESERTS...ISOLATED TO SCATTERED THUNDERSTORMS DURING THE 1800-06/0300 UTC TIME-PERIOD WITH BASES 7000-10000 FT MSL AND CB TOPS TO 40000 FT MSL...RESULTING IN LOCAL VIS AOB 2SM IN HEAVY RAIN...SMALL HAIL...AND POSSIBLE STRONG UP/DOWNDRAFTS. OTHERWISE...UNRESTRICTED VIS THROUGH FRIDAY MORNING. && .FIRE WEATHER... UPDATED FIRE WEATHER PLANNING FORECAST TO LOWER HUMIDITY ABOUT 5 PERCENT WEST OF THE MOUNTAINS. LOWEST HUMIDITY NOW IN THE 15 TO 20 PERCENT RANGE FOR INLAND EMPIRE. STILL EXPECTING THUNDERSTORMS OVER THE MOUNTAINS/DESERTS BY NOON...BUT NOT LIKELY TO BE TRANSPORTED WEST OF THE MOUNTAINS. && .SGX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE. && PUBLIC/FIRE WEATHER...BALFOUR AVIATION/MARINE...HARRISON SHORT TERM WARNINGS...TARDY
Hazardous weather outlook, Sep 5, 3:55 AM PDT, 8 hours 56 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 355 AM PDT THU SEP 5 2013 CAZ055-056-058-060>062-061100- SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS- SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS- COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 355 AM PDT THU SEP 5 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT ISOLATED AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE MOUNTAINS AND DESERTS. THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALIZED HEAVY RAINS...SMALL HAIL...GUSTY WINDS...FREQUENT LIGHTNING...WITH ISOLATED FLASH FLOODING POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ISOLATED AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE MOUNTAINS AND DESERTS EACH DAY. THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALIZED HEAVY RAINS...SMALL HAIL...GUSTY WINDS...FREQUENT LIGHTNING. .SPOTTER INFORMATION STATEMENT... SKYWARN WEATHER ACTIVATION MAY BE REQUESTED TODAY. CAZ048-050-061100- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS- 355 AM PDT THU SEP 5 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HOWEVER...VERY WARM CONDITIONS WILL DEVELOP ACROSS THE INLAND VALLEYS...AND A STRAY THUNDERSTORM MAY MOVE OFF THE MOUNTAINS INTO THE FAR INLAND VALLEYS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HOWEVER...VERY WARM CONDITIONS WILL DEVELOP ACROSS THE INLAND AREAS FOR FRIDAY AND SATURDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA... HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS. CAZ042-043-057-061100- ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS- SANTA ANA MOUNTAINS AND FOOTHILLS- 355 AM PDT THU SEP 5 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HOWEVER...VERY WARM CONDITIONS WILL DEVELOP ACROSS THE INLAND AREAS AGAIN TODAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HOWEVER...VERY WARM CONDITIONS WILL DEVELOP ACROSS THE INLAND AREAS FOR FRIDAY AND SATURDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA... HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
In the hours before
Local storm report, Sep 5, 10:50 AM PDT, 2 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1050 AM PDT THU SEP 5 2013
...TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
...DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 PM HAIL 3 SW IDYLLWILD-PINE COVE33.71N 116.76W
09/03/2013 M0.88 INCH RIVERSIDE CA PUBLIC
FACEBOOK PHOTO POST OF HAIL WITH NICKEL.
&&
IRIS SYSTEMThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 1:07 PM PDT | Areal Flood Advisory | SGX | San Diego | 5 hr |
| Sep 5, 1:28 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Sep 5, 1:46 PM PDT | Special Weather Statement | SGX | San Diego | 59 min |
| Sep 5, 1:50 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 55 min |
| Sep 5, 2:08 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
| Sep 5, 2:15 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 60 min |
| Sep 5, 2:34 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Sep 5, 2:51 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Sep 5, 3:10 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Sep 5, 4:04 PM PDT | Special Weather Statement | SGX | Orange | 56 min |
Nearby
Heat Advisories in California, 2013Every heat advisory 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.