Alert archive / California / Excessive Heat Warnings in 2012
Excessive Heat Warning 1, NWS San Diego, CA
NWS San Diego, CA issued this excessive heat warning at Jul 9, 2012, 1:20 PM PDT for Riverside County, San Bernardino County, San Diego County, California. It took effect at Jul 9, 2012, 2:00 PM PDT. It was in force for 66 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
- Jul 9, 2012, 1:20 PM PDT (20:20 UTC)
- In effect from
- Jul 9, 2012, 2:00 PM PDT
- Expired
- Jul 12, 2012, 7:39 AM PDT
- In force
- 66 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 20:25 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, 8.3 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
- 2272 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
900 WWUS76 KSGX 092020 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 120 PM PDT MON JUL 9 2012 ...VERY HOT CONDITIONS ACROSS THE SOUTHERN DESERTS THROUGH WEDNESDAY... .A STRONG RIDGE OF HIGH PRESSURE WILL CONTINUE TO EXPAND ACROSS SOUTHERN CALIFORNIA THROUGH WEDNESDAY...PRODUCING VERY HOT CONDITIONS ACROSS THE COACHELLA VALLEY AND THE SAN DIEGO COUNTY DESERTS. CAZ061-062-100500- /O.NEW.KSGX.EH.W.0001.120709T2100Z-120712T0000Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 120 PM PDT MON JUL 9 2012 ...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 5 PM PDT WEDNESDAY... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED AN EXCESSIVE HEAT WARNING...WHICH IS IN EFFECT UNTIL 5 PM PDT WEDNESDAY. * DAYTIME TEMPERATURES...115 TO 121. * NIGHTTIME TEMPERATURES...85 TO 95. * IMPACTS...THE COMBINATIONS OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$ PALMER
11 follow-up statements
011 WWUS76 KSGX 100447 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 947 PM PDT MON JUL 9 2012 ...VERY HOT CONDITIONS ACROSS THE SOUTHERN DESERTS THROUGH WEDNESDAY... .A STRONG RIDGE OF HIGH PRESSURE WILL CONTINUE OVER SOUTHERN CALIFORNIA THROUGH WEDNESDAY AND PRODUCE VERY HOT CONDITIONS ACROSS THE COACHELLA VALLEY AND THE SAN DIEGO COUNTY DESERTS. CAZ061-062-101300- /O.CON.KSGX.EH.W.0001.000000T0000Z-120712T0000Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 947 PM PDT MON JUL 9 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 5 PM PDT WEDNESDAY... * MAXIMUM DAYTIME TEMPERATURES...115 TO 121. * MINIMUM NIGHTTIME TEMPERATURES...83 TO 93. * IMPACTS...THE COMBINATIONS OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$ PALMER/MAXWELL
824 WWUS76 KSGX 100919 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 219 AM PDT TUE JUL 10 2012 ...HOT WEATHER FOR THE LOWER DESERTS THROUGH WEDNESDAY EVENING... .HIGH PRESSURE OVER UTAH WILL CONTINUE HOT WEATHER OVER THE LOWER DESERTS THROUGH WEDNESDAY EVENING. CAZ061-062-102100- /O.EXT.KSGX.EH.W.0001.000000T0000Z-120712T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 219 AM PDT TUE JUL 10 2012 ...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 10 PM PDT WEDNESDAY... * MAXIMUM DAYTIME HEAT INDEX VALUES...110...LOCALLY 110 TO 115. * MINIMUM NIGHTTIME HEAT INDEX VALUES...80 TO 90. * IMPACTS...AVOID STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON- CAFFEINATED FLUIDS. WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR THURSDAY THROUGH THE WEEKEND AS THE HIGH PRESSURE WEAKENS SLIGHTLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... AVOID STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON- CAFFEINATED FLUIDS. WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. && $$ 17
868 WWUS76 KSGX 101428 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 728 AM PDT TUE JUL 10 2012 ...VERY HOT WEATHER OVER THE COACHELLA VALLEY AND ANZA BORREGO DESERT THROUGH WEDNESDAY EVENING... .STRONG HIGH PRESSURE CENTERED OVER UTAH WILL CONTINUE TO PRODUCE HOT WEATHER OVER THE LOWER DESERTS THROUGH WEDNESDAY EVENING. CAZ061-062-102230- /O.CON.KSGX.EH.W.0001.000000T0000Z-120712T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 728 AM PDT TUE JUL 10 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT WEDNESDAY... * MAXIMUM DAYTIME TEMPERATURES...115 TO 121 WITH HEAT INDEX VALUES...110 TO 115. * TEMPERATURES IN THE DIRECT SUNLIGHT CAN BE UP TO TEN DEGREES WARMER. * MINIMUM NIGHTTIME TEMPERATURES...88 TO 98 WITH HEAT INDEX VALUES...84 TO 96. * IMPACTS...THE COMBINATIONS OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR THURSDAY THROUGH THE WEEKEND AS THE HIGH PRESSURE WEAKENS SLIGHTLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. && $$ BALFOUR
092 WWUS76 KSGX 102053 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 153 PM PDT TUE JUL 10 2012 ...VERY HOT WEATHER OVER THE COACHELLA VALLEY AND ANZA BORREGO DESERT THROUGH WEDNESDAY EVENING... .STRONG HIGH PRESSURE CENTERED OVER UTAH WILL CONTINUE TO PRODUCE HOT WEATHER OVER THE LOWER DESERTS THROUGH WEDNESDAY EVENING. CAZ061-062-110500- /O.CON.KSGX.EH.W.0001.000000T0000Z-120712T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 153 PM PDT TUE JUL 10 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT WEDNESDAY... * MAXIMUM DAYTIME TEMPERATURES...115 TO 121 WITH HEAT INDEX VALUES...110 TO 115. * TEMPERATURES IN THE DIRECT SUNLIGHT CAN BE UP TO TEN DEGREES WARMER. * MINIMUM NIGHTTIME TEMPERATURES...88 TO 98 WITH HEAT INDEX VALUES...84 TO 96. * IMPACTS...THE COMBINATIONS OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR THURSDAY THROUGH THE WEEKEND AS THE HIGH PRESSURE WEAKENS SLIGHTLY. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. && $$
281 WWUS76 KSGX 102249 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 349 PM PDT TUE JUL 10 2012 ...VERY HOT WEATHER OVER THE COACHELLA VALLEY AND ANZA BORREGO DESERT THROUGH WEDNESDAY EVENING... .STRONG HIGH PRESSURE CENTERED OVER UTAH WILL CONTINUE TO PRODUCE HOT WEATHER OVER THE LOWER DESERTS THROUGH WEDNESDAY EVENING. CAZ061-062-110700- /O.CON.KSGX.EH.W.0001.000000T0000Z-120712T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 349 PM PDT TUE JUL 10 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT WEDNESDAY... * MAXIMUM DAYTIME TEMPERATURES...115 TO 121. * MINIMUM NIGHTTIME TEMPERATURES...85 TO 95. * IMPACTS...THE COMBINATIONS OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR THURSDAY THROUGH THE WEEKEND AS THE HIGH PRESSURE WEAKENS AND MOVES EAST AWAY FROM THE REGION. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. && $$ MAXWELL
073 WWUS76 KSGX 110101 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 601 PM PDT TUE JUL 10 2012 ...HOT WEATHER IN THE INLAND EMPIRE WEDNESDAY THROUGH THURSDAY... ...VERY HOT WEATHER OVER THE COACHELLA VALLEY AND ANZA BORREGO DESERT THROUGH WEDNESDAY EVENING... .STRONG HIGH PRESSURE CENTERED OVER UTAH WILL CONTINUE TO PRODUCE HOT WEATHER OVER INTERIOR PARTS OF SOUTHERN CALIFORNIA THE NEXT FEW DAYS. THE HOTTEST DAYS IN THE INLAND EMPIRE WILL BE WEDNESDAY AND THURSDAY. THE LOWER DESERTS WILL HAVE EXTREME HEAT AGAIN WEDNESDAY...BUT THERE WILL BE SLIGHT COOLING THURSDAY AS MONSOONAL MOISTURE MOVES THROUGH THE AREA. CAZ048-111100- /O.EXB.KSGX.EH.W.0001.120711T1800Z-120713T0200Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- 601 PM PDT TUE JUL 10 2012 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM WEDNESDAY TO 7 PM PDT THURSDAY... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED AN EXCESSIVE HEAT WARNING...WHICH IS IN EFFECT FROM 11 AM WEDNESDAY TO 7 PM PDT THURSDAY. * MAXIMUM DAYTIME TEMPERATURES...103 TO 111. * MINIMUM NIGHTTIME TEMPERATURES...67 TO 77. * IMPACTS...THE COMBINATIONS OF HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED BEGINNING FRIDAY AND CONTINUING THROUGH THE WEEKEND DUE TO WEAKENING HIGH PRESSURE ALOFT AND REDEVELOPING ONSHORE FLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. && $$ CAZ061-062-111100- /O.CON.KSGX.EH.W.0001.000000T0000Z-120712T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 601 PM PDT TUE JUL 10 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT WEDNESDAY... * MAXIMUM DAYTIME TEMPERATURES...115 TO 121. * MINIMUM NIGHTTIME TEMPERATURES...85 TO 95. * IMPACTS...THE COMBINATIONS OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR THURSDAY THROUGH THE WEEKEND AS THE HIGH PRESSURE WEAKENS AND MOVES EAST AWAY FROM THE REGION. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. && $$ MAXWELL
901 WWUS76 KSGX 111029 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 329 AM PDT WED JUL 11 2012 ...HOT WEATHER IN THE INLAND EMPIRE TODAY AND THURSDAY... ...VERY HOT WEATHER WITH INCREASING HUMIDITY FOR THE LOWER DESERTS THROUGH THURSDAY EVENING... .HIGH PRESSURE CENTERED OVER UTAH WILL CONTINUE TO PRODUCE HOT WEATHER OVER INTERIOR PARTS OF SOUTHERN CALIFORNIA THE NEXT FEW DAYS. THE HOTTEST DAYS IN THE INLAND EMPIRE WILL BE TODAY AND THURSDAY. THE LOWER DESERTS WILL HAVE EXTREME HEAT AGAIN TODAY...BUT HIGH TEMPERATURES WILL DECREASE SLIGHTLY THURSDAY AS THE HUMIDITY INCREASES. CAZ048-112100- /O.NEW.KSGX.EH.W.0002.120712T1800Z-120713T0300Z/ /O.EXT.KSGX.EH.W.0001.120711T1800Z-120712T0300Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- 329 AM PDT WED JUL 11 2012 ...EXCESSIVE HEAT WARNING NOW IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING... ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM PDT THURSDAY... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED AN EXCESSIVE HEAT WARNING...WHICH IS IN EFFECT FROM 11 AM TO 8 PM PDT THURSDAY. * MAXIMUM DAYTIME TEMPERATURES...98 TO 108. * IMPACTS...AVOID STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON- CAFFEINATED FLUIDS. WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY. * OUTLOOK...SLOW COOLING IS EXPECTED BEGINNING FRIDAY AND CONTINUE THROUGH THE WEEKEND DUE TO WEAKENING HIGH PRESSURE ALOFT AND REDEVELOPING ONSHORE FLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$ CAZ061-062-112100- /O.EXT.KSGX.EH.W.0001.000000T0000Z-120713T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 329 AM PDT WED JUL 11 2012 ...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 10 PM PDT THURSDAY... * MAXIMUM DAYTIME TEMPERATURES TODAY...112 TO 118 WITH HEAT INDEX VALUES OF 106 TO 114. * MAXIMUM DAYTIME TEMPERATURES THURSDAY...110 TO 116 WITH HEAT INDEX VALUES OF 110 TO 120. * MINIMUM NIGHTTIME TEMPERATURES...80 TO 90. * IMPACTS...THE COMBINATION OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR FRIDAY THROUGH THE WEEKEND AS A WEAK TROUGH OF LOW PRESSURE DEVELOPS NEAR THE WEST COAST. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$ 17
105 WWUS76 KSGX 112108 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 208 PM PDT WED JUL 11 2012 ...HOT WEATHER OVER THE INLAND EMPIRE THROUGH THIS EVENING... ...HOT AND HUMID WEATHER OVER THE LOWER DESERTS THROUGH THURSDAY EVENING... .HIGH PRESSURE CENTERED OVER UTAH IS BEGINNING TO MOVE EASTWARD. IT IS STILL STRONG ENOUGH TO GENERATE RECORD HIGH TEMPERATURES OVER SOUTHWEST CALIFORNIA TODAY. ON THURSDAY...THE COMBINATION OF HIGH TEMPERATURES AND INCREASING HUMIDITY WILL ALSO KEEP THE HEAT INDICES VERY HIGH. CAZ048-120300- /O.CAN.KSGX.EH.W.0002.120712T1800Z-120713T0300Z/ /O.CON.KSGX.EH.W.0001.000000T0000Z-120712T0300Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- 208 PM PDT WED JUL 11 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... ...EXCESSIVE HEAT WARNING IS CANCELLED FOR THURSDAY... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS CANCELLED THE EXCESSIVE HEAT WARNING FOR THURSDAY. * MAXIMUM DAYTIME TEMPERATURES...98 TO 108. * IMPACTS...AVOID STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON- CAFFEINATED FLUIDS. WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY. * OUTLOOK...INCREASING CLOUDS AND THREAT OF THUNDERSTORMS WITH RAINFALL WILL BRING A COOLING TREND THURSDAY THROUGH THE WEEKEND. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES... EVEN BRIEFLY. && $$ CAZ061-062-120515- /O.CON.KSGX.EH.W.0001.000000T0000Z-120713T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 208 PM PDT WED JUL 11 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THURSDAY... * MAXIMUM DAYTIME TEMPERATURES TODAY...112 TO 118 WITH HEAT INDEX VALUES OF 106 TO 114. * MAXIMUM DAYTIME TEMPERATURES THURSDAY...110 TO 116 WITH HEAT INDEX VALUES OF 110 TO 120. * MINIMUM NIGHTTIME TEMPERATURES...80 TO 90. * IMPACTS...THE COMBINATION OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR FRIDAY THROUGH THE WEEKEND AS A WEAK TROUGH OF LOW PRESSURE DEVELOPS NEAR THE WEST COAST. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$
169 WWUS76 KSGX 120300 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 800 PM PDT WED JUL 11 2012 ...HOT AND HUMID WEATHER OVER THE LOWER DESERTS THROUGH THURSDAY EVENING... .AN UPPER LEVEL HIGH CENTERED OVER UTAH AND INCREASING MONSOON MOISTURE WILL CONTINUE HOT AND HUMID CONDITIONS OVER THE LOW DESERTS THROUGH THURSDAY. CAZ048-120400- /O.EXP.KSGX.EH.W.0001.000000T0000Z-120712T0300Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- 800 PM PDT WED JUL 11 2012 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING... MINOR COOLING WILL TAKE PLACE TONIGHT INTO THURSDAY AND THE EXCESSIVE HEAT WARNING WILL BE ALLOWED TO EXPIRE AT 8 PM. $$ CAZ061-062-121400- /O.CON.KSGX.EH.W.0001.000000T0000Z-120713T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 800 PM PDT WED JUL 11 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THURSDAY... * MAXIMUM DAYTIME TEMPERATURES THURSDAY...105 TO 115 WITH HEAT INDEX VALUES OF 105 TO 115. * MINIMUM NIGHTTIME TEMPERATURES...82 TO 93. * IMPACTS...THE COMBINATION OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING IS EXPECTED FOR FRIDAY THROUGH THE WEEKEND AS A WEAK TROUGH OF LOW PRESSURE DEVELOPS NEAR THE WEST COAST. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$ SS
934 WWUS76 KSGX 121000 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 300 AM PDT THU JUL 12 2012 ...HOT AND HUMID WEATHER OVER THE LOWER DESERTS THROUGH THIS EVENING... .HOT AND HUMID CONDITIONS WILL CONTINUE TO PREVAIL ACROSS THE THE SOUTHERN DESERTS TODAY...AS A VERY STRONG RIDGE OF HIGH PRESSURE REMAINS OVER THE INTERMOUNTAIN WEST. CAZ061-062-122200- /O.CON.KSGX.EH.W.0001.000000T0000Z-120713T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 300 AM PDT THU JUL 12 2012 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * MAXIMUM DAYTIME TEMPERATURES...105 TO 115...WITH HEAT INDEX VALUES OF 105 TO 115. * MINIMUM NIGHTTIME TEMPERATURES...82 TO 93. * IMPACTS...THE COMBINATION OF VERY HOT DAYS ALONG WITH VERY WARM NIGHTS CAN RESULT IN VERY OPPRESSIVE CONDITIONS...IN WHICH THE BODY CANNOT RECOVER AS QUICKLY. CONDITIONS LIKE HEAT STROKE OR HEAT EXHAUSTION ARE POSSIBLE...ESPECIALLY IF ENGAGING IN STRENUOUS OUTDOOR ACTIVITIES. THIS WEATHER COULD BE DEADLY FOR UNPREPARED CAMPERS OR HIKERS. * OUTLOOK...SLOW COOLING TREND WILL DEVELOP FOR FRIDAY THROUGH THE WEEKEND...AS A WEAK TROUGH OF LOW PRESSURE DEVELOPS NEAR THE WEST COAST. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN POSSIBLE... RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE AND DRINK PLENTY OF WATER. TO REDUCE RISK DURING OUTDOOR WORK THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN EMERGENCY - CALL 911. && $$ PALMER
584 WWUS76 KSGX 121439 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 739 AM PDT THU JUL 12 2012 ...HEAT ADVISORY CANCELLED FOR LOWER DESERTS... ...WIND ADVISORY ISSUED FOR MOUNTAINS OF WESTERN RIVERSIDE AND SAN DIEGO COUNTY...INLAND EMPIRE AND INLAND VALLEYS OF SAN DIEGO COUNTY... .EXTENSIVE CLOUD COVER AND RAINFALL TODAY AND TONIGHT WILL LOWER THE THREAT OF EXCESSIVE HEAT OCCURRING OVER THE DESERT REGIONS. MODERATE TO STRONG EASTERLY BREEZES ARE OCCURRING AHEAD OF A TROUGH MOVING WEST ACROSS THE AREA. WIND GUSTS 35 TO 50 MPH ARE LIKELY TO CONTINUE INTO THE LATE MORNING AND EARLY AFTERNOON HOURS OVER RIVERSIDE AND SAN DIEGO COUNTY MOUNTAINS AND VALLEYS BEFORE DIMINISHING. CAZ061-062-121545- /O.CAN.KSGX.EH.W.0001.000000T0000Z-120713T0500Z/ COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 739 AM PDT THU JUL 12 2012 ...EXCESSIVE HEAT WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS CANCELLED THE EXCESSIVE HEAT WARNING. $$ CAZ048-050-056-058-122100- /O.NEW.KSGX.WI.Y.0042.120712T1439Z-120712T2100Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS-RIVERSIDE COUNTY MOUNTAINS- SAN DIEGO COUNTY MOUNTAINS- 739 AM PDT THU JUL 12 2012 ...WIND ADVISORY IN EFFECT UNTIL 2 PM PDT THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 2 PM PDT THIS AFTERNOON. * WINDS...EAST WINDS GUSTING 35 TO 50 MPH. * TIMING...UNTIL 2 PM THIS AFTERNOON. * LOCATION...OVER MOUNTAIN RIDGES...THROUGH AND BELOW EAST TO WEST ALIGNED CANYONS AND PASSES. * IMPACTS...DIFFICULT DRIVING CONDITIONS...ESPECIALLY FOR OPERATORS OF HIGH PROFILE VEHICLES. MINOR DAMAGE TO TREES AND LARGE SIGNS. * OUTLOOK...WINDS DIMINISHING DURING THE AFTERNOON. RAINFALL AMOUNTS INCREASING FROM SHOWERS ACCOMPANYING THUNDERSTORMS. A FLASH FLOOD WATCH IS IN EFFECT FOR THE MOUNTAINS AND DESERT AREAS. * REPORTS... HIGHLAND SPRINGS.......EAST WIND GUSTING 59 MPH AT 6 AM PDT LYONS PEAK.............EAST WIND GUSTING 58 MPH AT 6 AM PDT SKY VALLEY.............EAST WIND GUSTING 52 MPH AT 5 AM PDT FISH CREEK MOUNTAINS...EAST WIND GUSTING 44 MPH AT 6 AM PDT BOULDER CREEK..........EAST WIND GUSTING 41 MPH AT 5 AM PDT LUCKY FIVE RANCH.......EAST WIND GUSTING 39 MPH AT 5 AM PDT PINE HILLS.............EAST WIND GUSTING 39 MPH AT 6 AM PDT PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ BALFOUR
What forecasters said that day
The local office's own words before this excessive heat warning 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 excessive heat warning went out at Jul 9, 9:35 AM PDT, 3 hours 45 minutes earlier.
Area forecast discussion, Jul 9, 9:35 AM PDT, 3 hours 45 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN DIEGO CA 935 AM PDT MON JUL 9 2012 .SYNOPSIS... HOT CONDITIONS WILL CONTINUE ACROSS THE INLAND AREAS...AS HIGH PRESSURE REMAINS CENTERED OVER THE GREAT BASIN. SOME SUBTROPICAL MOISTURE WILL START SPREADING OVER THE REGION AS EARLY AS TODAY...BUT THE BEST AFTERNOON AND EVENING INSTABILITY WILL OCCUR FROM WEDNESDAY ONWARD...WITH A SLIGHT CHANCE OF SHOWERS OR THUNDERSTORMS. A SHALLOW MARINE LAYER WILL KEEP AREAS NEAR THE COAST COOLER...WITH AREAS OF LATE NIGHT AND EARLY MORNING LOW CLOUDS AND FOG EXTENDING LOCALLY INLAND. && .DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... WATER VAPOR IMAGERY SHOWS THE RIDGE OF HIGH PRESSURE CENTERED OVER THE GREAT BASIN THIS MORNING...DOMINATING THE WEATHER ACROSS SOUTHERN CALIFORNIA. WATER VAPOR IMAGERY ALSO SHOWS THAT THE MID AND UPPER LEVEL MOISTURE IS STARTING TO INCREASE ACROSS SOUTHERN CALIFORNIA...AS A SERIES OF DISTURBANCES MOVE AROUND THE RIDGE. ONE OF THESE DISTURBANCES IS MOVING WESTWARD FROM THE GULF OF CALIFORNIA INTO CENTRAL BAJA...WHILE ANOTHER DISTURBANCE IS SLOWLY DRIFTING WESTWARD FROM SOUTHWESTERN ARIZONA...WHICH IS BRINGING SOME ACCUS ACROSS SOUTHEASTERN CALIFORNIA. LOOKING OUT THE WINDOW...THESE CLOUDS ARE STARTING TO SHOW A LITTLE VERTICAL DEVELOPMENT...EVEN THOUGH STABILITY PARAMETERS ARE SUGGESTING ONLY A THIN LAYER OF INSTABILITY. THEREFORE...AM WONDERING IF THE MODELS ARE RESOLVING THIS FEATURE WELL. THIS WILL BE ENOUGH FOR SOME HIGH BASED CUMULUS DEVELOPMENT THIS AFTERNOON...WHICH OUR FORECAST ALREADY SHOWS. HOWEVER...WILL CONTINUE TO WATCH THIS FEATURE THROUGH THE EARLY AFTERNOON HOURS...AS A DRY THUNDERSTORM MAY NOT BE OUT OF THE QUESTION OVER THE MOUNTAINS AND DESERTS. OTHERWISE...EXPECT ANOTHER HOT DAY ACROSS THE REGION TODAY TEMPERATURES TRENDS ARE ALREADY RUNNING 2 TO 9 DEGREES WARMER THAN THIS TIME YESTERDAY...AND THE 12Z KNKX SOUNDING SHOWS UP TO 6 DEGREES OF WARMING IN THE LEVELS BELOW 700 MBS...WITH A 13 DEGREE INVERSION. THIS MEANS THAT TEMPERATURES ACROSS THE INLAND EMPIRE WILL LIKELY TOP OUT IN THE UPPER 90S AND LOWER 100S...WHILE THE LOWER DESERTS HEAT UP INTO THE 113 TO 120 RANGE. ALTHOUGH THE RECORDS THIS TIME OF YEAR ARE QUITE HIGH...A FEW LOCATIONS TODAY MAY BE FLIRTING WITH THEIR RECORDS. TOMORROW AND WEDNESDAY WILL LIKELY BE THE HOTTEST DAYS ACROSS THE REGION...AS 850 MBS TEMPERATURES PEAK THESE DAYS. AT THIS POINT IN TIME...IT APPEARS THAT A FEW RECORDS MIGHT FALL THESE DAYS...MAINLY IN THE MOUNTAIN AND DESERT AREAS. SUBTROPICAL MOISTURE WILL ALSO CONTINUE TO SPREAD INTO SOUTHERN CALIFORNIA OVER THE NEXT FEW DAYS. FOR NOW...IT APPEARS THAT THE BEST MOISTURE AND INSTABILITY WILL REALLY START TO SPREAD ACROSS SOUTHERN CALIFORNIA DURING THE DAY ON WEDNESDAY. THIS MEANS THAT THE THREAT OF SHOWERS OR THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON THROUGH THE EARLY EVENING HOURS THROUGH FRIDAY...BUT ONLY OVER THE MOUNTAINS AND DESERT AREAS. THE EXTENDED MODELS ARE CONTINUING TO FLIP FLOP FOR THE WEEKEND...TRYING TO DECIDE TO DIG THE TROUGH OR KEEP THE RIDGE IN PLACE. AS A RESULT...CANNOT RULE OUT THE A SLIGHT CHANCE OF SHOWERS OR THUNDERSTORMS THROUGH THE WEEKEND...BUT IT LOOKS LIKE SOME MINOR COOLING WILL STILL TAKE PLACE. && .FIRE WEATHER... VERY HOT AND DRY CONDITIONS WILL CONTINUE ACROSS THE MOUNTAINS AND DESERTS THE NEXT SEVERAL DAYS. DAYTIME HUMIDITIES WILL RANGE BETWEEN 5 AND 15 PERCENT IN THESE AREAS THROUGH AT LEAST WEDNESDAY...WITH POOR OVERNIGHT RECOVERIES. ALTHOUGH WINDS WILL PREDOMINATELY BE TERRAIN DRIVEN AND RELATIVELY LIGHT...SOME LOCALLY GUSTY ONSHORE WINDS WILL BE POSSIBLE THROUGH AND BELOW THE FAVORED CANYONS AND PASSES EACH AFTERNOON AND EVENING. THESE VERY DRY AND HOT CONDITIONS WILL ELEVATE THE FIRE DANGER CONCERNS. INLAND VALLEYS WILL ALSO SEE SOME HOT CONDITIONS. HOWEVER...DAYTIME HUMIDITIES WILL LIKELY RANGE BETWEEN 10 AND 20 PERCENT...WITH MODERATE TO GOOD RECOVERIES POSSIBLE. A SHALLOW MARINE LAYER WILL HELP MODERATE COASTAL AREAS. THE THREAT OF AFTERNOON AND EVENING THUNDERSTORMS WILL INCREASE OVER THE MOUNTAINS AND DESERTS ON WEDNESDAY...AND CONTINUE THROUGH THE WEEKEND. AT THIS TIME...THE STORMS WILL LIKELY START OUT DRY...GIVEN THE VERY DRY ATMOSPHERE. HOWEVER...WILL MOISTEN OVER TIME...WITH PREDOMINATELY WET THUNDERSTORMS FROM THURSDAY ONWARD. && .AVIATION... 091605Z...THROUGH 1800 UTC...N-SCT STRATUS OVER WATER TO 5SM INLAND WITH BASES 600 FT MSL AND TOPS 1200 FT MSL AND SCT ALTOCUMULUS CLOUDS OVER DESERTS IN THE 15000-18000 FT MSL LAYER. 1800-10/0300 UTC...T-FEW STRATUS CONTINUING OVER WATER AND SCT CUMULUS/TOWERING CUMULUS OVER MTNS WITH BASES 10000-1200 FT MSL AND TOPS 20000 FT MSL. TSTMS MAY DEVELOP OVER SRN APPROACH RTES WITH TOPS TO FL450. 10/0300-1500...C SCT-BKN STRATUS DEVELOPING OVER WATER AND SPREADING INLAND 10 SM AFTER 06Z WITH BASES 400 FT MSL AND TOPS 800 FT MSL SFC VSBY 1-2SM IN BR...COASTAL AIRPORTS MAY BE IMPACTED WITH LIFR CIGS BETWEEN 0900-1500 UTC. ADNL SCT-BKN CLDS IN THE 13000-22000 FT MSL LAYER. && .MARINE... ABOVE NORMAL SURF AND HIGH RISK OF RIP CURRENTS TO CONTINUE ALONG ORANGE COUNTY AND SOUTH FACING BEACHES OF SAN DIEGO COUNTY BEACHES FOR MOST OF THE WEEK...DUE TO A COMBINATION OF SWELLS FROM THE TWO HURRICANES AND THOSE GENERATED BY DISTANT SOUTHERN HEMISPHERE STORMS SEVERAL WEEKS AGO. && .SGX WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC/FIRE...PALMER AVIATION/MARINE...BALFOUR
Hazardous weather outlook, Jul 9, 5:15 AM PDT, 8 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 515 AM PDT MON JUL 9 2012 CAZ042-048-050-055>058-060>062-100200- ORANGE COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS- RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS- SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS- COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS- 515 AM PDT MON JUL 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INLAND AREAS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT HIGH PRESSURE OVER UTAH WILL BRING HOT DAYTIME WEATHER TO INLAND AREAS. DURING THE PEAK OF THE HEAT...AVOID STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON-CAFFEINATED FLUIDS. WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY FOR TUESDAY AND WEDNESDAY...HIGH PRESSURE OVER UTAH WILL BRING HOT DAYTIME WEATHER TO INLAND AREAS. DURING THE PEAK OF THE HEAT EACH DAY...AVOID STRENUOUS OUTDOOR ACTIVITY IF POSSIBLE. IF YOU HAVE TO BE OUTSIDE...DRINK PLENTY OF NON-ALCOHOLIC...NON-CAFFEINATED FLUIDS. WEAR LIGHTWEIGHT LOOSE-FITTING CLOTHING. WEAR A HAT TO SHIELD YOURSELF FROM THE SUN...AND USE SUN SCREEN TO REDUCE POSSIBLE SUNBURN. TAKE ADVANTAGE OF AIR CONDITIONING AND SHADE IF POSSIBLE. NEVER LEAVE CHILDREN OR PETS IN ENCLOSED VEHICLES...EVEN BRIEFLY. FOR WEDNESDAY THROUGH FRIDAY FOR THE MOUNTAINS AND DESERTS... MONSOONAL MOISTURE WILL BRING A SLIGHT CHANCE OF MAINLY AFTERNOON AND EARLY EVENING THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. CAZ043-100200- SAN DIEGO COUNTY COASTAL AREAS- 515 AM PDT MON JUL 9 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SAN DIEGO COUNTY COASTAL AREAS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. 17
Nearby
Excessive Heat Warnings in California, 2012Every excessive heat warning in 2012
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.