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SOCAL CLIMATOLOGY
WEATHER CLIMATOLOGY FOR SOUTHERN CALIFORNIA
53
Meteorology
Professional
10/02/2011

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Cards

Term
SUMMER WEATHER PHENOMENONS
Definition

EPAC HIGH

MARINE LAYER

SONORA

THERMAL lOW

MT. BREEZE (KNJK)

DUST DEVILS(KNJK)

TROPICAL CYCLONES

 

Term
FALL WEATHER PHENOMENON
Definition

EPAC HIGH

SANTA ANNA

RAPID 2 WEEK TRANSITION(KNJK)

Term
WINTER WEATHER PHENOMENON
Definition

E PAC HIGH

FRONTS

CUT OFF LOWS

NEVADA LOW (KNJK)

RADIATION FOG

Term
SPRING WEATHER PHENOMENON
Definition

E PAC HIGH

CATALINA EDDY (EDDIES)

RAPID 2 WEEK TRANSITION(KNJK)

Term
EPAC HIGH (SUMMER)
Definition
DOMINANT FEATURE/NORTHERN MOST POSITION
Term
FORMATION OF MARINE LAYER?
Definition
HIGH PRESSURE PRODUCES SUBSIDENCE ALFOR CREATING AN INVERSION CAPPING OFF MOISTURE IN THE LOWER LEVELS
Term
MARINE LAYER IMPACTS
Definition
IFR CONDITIONS FOR CSTL STATIONS AND OVER WATER
Term
SONORA-LOOK FOR?
Definition
MID TO HIGH LEVEL MOISTURE ADVECTIN FROM GULF OF MEXICO OVER SONORA MTS
Term
SONORA CAUSE?
Definition
MID TO HIGH PRESSURE OVER THE FOR CORNERS OR RIDGING ASSOCIATED WITH BERMUDA HIGH PUSHES MOISTURE INTO THE AREA AND INSTABILITY DUE TO INTENSE DAYTIME HEATING AND OROGRAPHIC LIFT
Term
SONORA THUMB RULES
Definition
500 MB WINDS OF 25 TO 35KTS
Term
SONORA W/ LESS THAN 25KTS?
Definition
CONFINED TO EASTERN SLOPES OF MTS
Term
A SONORO W/ 40KTS OR GREATER?
Definition
THUNDERSTORMS WILL SHREAD APART
Term
SONORA-DAY OR NIGHT?
Definition
STRONGEST AT NIGHT DUE TO DIURNAL EFFECTS
Term
THERMAL LOW CAUSE?
Definition
INTENSE SURFACE HEATING CREATS THERMAL INVERTED TROUGH
Term
THERMAL LOW LOCATED?
Definition
EXTENDS FROM MEXICO UP INTO OREGON AND SOMETIMES BRITISH COLUMBIA
Term
THERMAL LOW WARM CORE/ COLD CORE?
Definition
WARM CORE LOW
Term
TROPICAL SEASON IN E-PAC?
Definition
MAY 15TH-NOV 30TH
Term
TROPICALS IMACT TO SOCAL?
Definition
INCREASED MID/UPPER LEVEL MOISTURE, SOUTHERLY SWELLS
Term
MOUNTAIN BREEZE LOCATED?
Definition
MORE FREQUENT IN IMPERIAL VALLEY
Term
MOUNTAIN BREEZE FORMATION?
Definition
RAPID COOLING OF MT TOP AND PRESSURE DIFFERENTIAL BETWEEN KNZY AND KNJK
Term
MOUNTAIN BREEZE EFFECTS
Definition
STRONG/GUSTY WINDS THAT PERSIST UP TO 12 HRS
Term
DUST DEVELS LOCATION?
Definition
COMMON OVR DESERT AREAS
Term
DUST DEVEL DEVELOPMENT
Definition
TEMPETURE DIFFERENTIAL DUE TO INTENSE DAYTIME HEATING AND FORM A STEEP TEMP LAPSE RATE IN LOWER ATMOSPHER
Term
DUST DEVELS-DIAMETER?
Definition
10-100FT
Term
DUST DEVELS-HEIGHT?
Definition
UP TO 600FT IN HEIGHT
Term
DUST DEVEL-ROTATION?
Definition
ANTI-CYCLONICALLY AND CYCLONICALLY
Term
DUST DEVELS-EFFECTS?
Definition
BRIEF MODERATE TURBULANCE
Term
E-PAC HIGH-FALL?
Definition
E-PAC HIGH BEGINS TO MIGRATE SOUTH TOWARD EQUATOR
Term
FALL TRANSITIONAL SEASON
Definition
KNJK EXPERIENCES A RAPID (TWO WEEK) TRANSITION BETWEEN SUMMER AND WINTER
Term
SANTA ANNA-CAUSE?
Definition
MIGRATORY HIGH OVER GREAT BASIN
Term
EXPLAIN SANTA ANNA
Definition
HIGH PRESSURE WINDS ARE PUSHED UP AND OVER SIERRA AND ROCKIE MTS WIND DRIES AND WARMS ON LEEWARD SIDE OF MTS PICKING UP SPEED FUNNELING THRU CANYONS AND PASSES  DISPLACING POLLUTANTS OUT AND OVER WATER INCREASING TEMPS FOR SOCAL AREAS
Term

SANTA ANNA THUMB RULES:

KNZY-KIPL

Definition
2-5MB
Term

SANTA ANNA THUMB RULES:

KLAX-KDAG

Definition
5-7MB
Term

SANTA ANNA THUBM RULES:

KNZY-KTPH

Definition
10MB
Term
SANTA ANNA IMPACTS
Definition
MOD TO SEVER LL TURB, LLWS, AND FIRE HAZARD
Term
SANTA ANNA IMPACTS AFTER?
Definition
SUSPENDED PARTICLSE BECOME CCN AND DISPLACED AIR MASS BECOMES SATURATED, WHEN HIGH PRESSURE MOVES OUT THE MARINE LAYER SURGEDS BACK IN APROX. 12-24HRS LATER BRING DENSE FOG
Term
E-PAC HIGH-WINTER
Definition
E-PAC HIGH IS AT SOUTHER MOST POSTIION MAKNG WAY FOR FRONT S AND CUT-OFF LOWS TO PASS THROUGH
Term
FRONTAL SYSTEMS-IMPACTS?
Definition
INCREASING CLOUDINESS, SHRA, STRONG GUSTY WINDS, AND POSSIBLE TS
Term
CUT OFF LOWS: FORMATION
Definition
SUPERGRADIET JET MAX BUILDS UP THE UPSTREAM RIDGE AND DEEPENS THE OWNSTREAM TROUGH SO THE JET MAX IS NOT ABLE TO COMPLETE TURN OVERSHOOTING IT AND CUTTING IT OFF FROM JET
Term
CUT-OFF LOWS: IMPACTS TO SOCAL
Definition
LOW SLOWLY MOVES SOUTH WARD INCREASING CLOUDINESS, SOME SHRA, POSSIBLE GUSTY WINDS, AND TS
Term
CUT-OFF LOWS: TS THUMB RULE
Definition
COLD CORE CENTER NEES TO BE -25°F
Term
CUT-OFF LOW: DISSIPATION
Definition
FILLING OF THE LOW FROM BOTTOM UP OR KICKER TROUGH OPENS THE LOW AND MOVE IT OUT
Term

NEVADA(TONOPAH) LOW:

 FORMATION

Definition
UPPER LEVEL LOW MOVES OVER AND SUPERIMPOSES ITSELF OVR A WEAK BOUNDARY LOCATED IN NV
Term

NEVADA(NONOPAH) LOW:

IMPACTS

Definition
STRONG GUSTY WINDS FOR MTS, VALLEY, AND DESERT AREAS
Term

RADIATION FOG:

FORMATION

Definition
COOLING OF LAND AFTER SUNSET BY THERMAL RADIATION IN CALM CONDITIONS W/ CLEAR SKIES
Term

RADIATION FOG:

THICKNESS

Definition
IN PERFECT CALM FOG LAYER CAN BE LESS THAN A METER DEEP BUT TURB CAN THICKEN THE LAYER
Term

RADIATION FOG:

OCCURS?

Definition
AT NIGHT, NOT LASTING LONG AFTER SUNRISE
Term
E-PAC HIGH: SPRING
Definition
E-PAC HIGH BEGINS TO MIGRATE TO THE NORTH REDUCING FRONTS AND CUT-OFF LOWS TO PASS THROUGH
Term

TRANSITION SEASON:

SPRING

Definition
FOR KNJK THE SATION EXPERIENCES RAPID (TWO WK) TRANSITION BETWEEN SUMMER AND WINTER
Term
CATALINA EDDIES: CAUSE
Definition
E-PAC HIGH OFF THE COAST WITH THERMAL LOW INLAND, CAUSES WINDS TO FLOW FROM HIGH TO LOW PRESSURE AND THE NW FLOW AROUND THE HIGH PARALLELS COAST CRASTIN MICROSCALE CIRCULATION IN BITE AREA
Term

CATALINA EDDY THUMB RULES:

WINDS

Definition
PT CONCEPTION NEEDS WINDS OF 25KTS
Term

EDDY THUMB RULES:

TEMPETURE LOCATION

Definition

HIGHST TEMP NE OF KNZY= PSEUDO CATALINA

HIGHEST TEMP E OR SE OF KNZY= TRUE CATALINA

Term
CATALINA EDDY: IMPACTS
Definition
IFR CONDITIONS FOR KNZY AND KNTD, AND SW WINDS
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