Pimoh Daimaoh's Personal Weather and Earthquake Monitoring in Caloocan City Philippines - Home
2026-08-20 01:57 AM EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5405
Valid From: 2026 Aug 17 2101 UTC
Now Valid Until: 2026 Aug 20 0900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
TROPICAL CYCLONE ADVISORY:
ABPW10 PGTW 191030
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH
PACIFIC OCEANS REISSUED/191030Z-200600ZAUG2026//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/190751ZAUG2026//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
A. TROPICAL CYCLONE SUMMARY:
(1) AT 19AUG26 0600Z, TROPICAL STORM 17W (SAUDEL) WAS LOCATED
NEAR 8.5N 154.1E, APPROXIMATELY 144 NM EAST-NORTHEAST OF CHUUK, AND
HAD TRACKED NORTHWARD AT 04 KNOTS OVER THE PAST SIX HOURS. MAXIMUM
SUSTAINED SURFACE WINDS WERE ESTIMATED AT 35 KNOTS GUSTING TO 45
KNOTS. SEE REF A (WTPN31 PGTW 190900) FOR FURTHER DETAILS.
(2) NO OTHER TROPICAL CYCLONES.
B. TROPICAL DISTURBANCE SUMMARY:
(1) THE AREA OF CONVECTION (INVEST 94W) PREVIOUSLY LOCATED NEAR
22.5N 128.3E IS NOW LOCATED NEAR 23N 126.7E, APPROXIMATELY 132 NM
SOUTHEAST OF MIYAKOJIMA. THE SYSTEM IS CURRENTLY CLASSIFIED AS A
MONSOON DEPRESSION, GENERALLY CHARACTERIZED AS A LARGE CYCLONIC
CIRCULATION, GREATER THAN 600 NM DIAMETER, WITH ENHANCED WINDS OVER
THE SOUTHEASTERN PERIPHERY AND A WEAK CORE OF LIGHT WINDS. ANIMATED
MULTISPECTRAL SATELLITE IMAGERY (MSI) DEPICTS A BROAD CIRCULATION
CENTER, WITH MULTIPLE AREAS OF TURNING EMBEDDED WITHIN THE LLCC.
ENVIRONMENTAL ANALYSIS REVEALS FAVORABLE CONDITIONS FOR DEVELOPMENT
WITH LOW (10 TO 15KTS) VERTICAL WIND SHEAR, MODERATE UPPER-LEVEL
EQUATORWARD OUTFLOW, AND WARM (29 TO 30 C) SEA SURFACE TEMPERATURES.
GLOBAL MODELS DEPICT AN AREA OF BROAD TROUGHING THAT IS UNLIKELY TO
TRANSITION INTO A CONSOLIDATED TROPICAL CYCLONE. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. FOR HAZARDS AND
WARNINGS, REFERENCE THE FLEET WEATHER CENTER SAN DIEGO HIGH WINDS AND
SEAS PRODUCT OR REFER TO LOCAL WMO DESIGNATED FORECAST AUTHORITY.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 23 TO 27 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1002 MB. THE
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN
THE NEXT 24 HOURS REMAINS LOW.
(2) THE AREA OF CONVECTION (INVEST 95W) PREVIOUSLY LOCATED NEAR
19.0N 114.2E IS NOW LOCATED NEAR 19.5N 111.8E, APPROXIMATELY 90 NM
EAST-SOUTHEAST OF HAIKOU. ANIMATED MULTISPECTRAL SATELLITE IMAGERY
(MSI) DEPICTS A BROAD AND ELONGATED LOW -LEVEL CIRCULATION (LLC) THAT
HAS BEEN CONSOLIDATING OVER THE LAST 6-12 HOURS. A 190155Z METOP-B
ASCAT PASS REVEALS A BROAD CIRCULATION EMBEDDED WITHIN A TROUGH EAST
OF HAINAN. ENVIRONMENTAL ANALYSIS REVEALS MARGINAL TO FAVORABLE
CONDITIONS FOR DEVELOPMENT WITH MODERATE VERTICAL WIND SHEAR (15 TO
20KTS) AND MODERATE EQUATORWARD OUTFLOW, HOWEVER, IT IS OFFSET BY WARM
(29 TO 30 C) SEA SURFACE TEMPERATURES WHICH ARE CONDUCIVE FOR STRONGER
DEVELOPMENT. GLOBAL MODELS INDICATE THAT 95W WILL GRADUALLY INTENSIFY
AND CONSOLIDATE IN THE SOUTH CHINA SEA. ENSEMBLE MODELS ALSO SHOW
FURTHER DEVELOPMENT AND A GENERAL WESTWARD TRACK TOWARDS HAINAN OVER
THE NEXT 36-48 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT
18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 998
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL
CYCLONE WITHIN THE NEXT 24 HOURS REMAINS MEDIUM.
(3) NO OTHER SUSPECT AREAS.
C. SUBTROPICAL SYSTEM SUMMARY:
(1) AN AREA OF CONVECTION (INVEST 96W) HAS PERSISTED NEAR 33.2N
164.1E, APPROXIMATELY 842 NM NORTH OF WAKE ISLAND. THE SYSTEM IS
CURRENTLY CLASSIFIED AS A SUBTROPICAL CYCLONE, GENERALLY CHARACTERIZED
AS HAVING BOTH TROPICAL AND MIDLATITUDE CYCLONE FEATURES. ANIMATED
ENHANCED INFRARED SATELLITE IMAGERY (EIR) DEPICTS INVEST 96W WITH A
FULLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) AND SPARSE
CONVECTION WITHIN THE NORTHERN PERIPHERY THAT IS HEAVILY SHEARED FROM
THE SOUTH. THE HIGH SOUTHERLY SHEAR IS CAUSED BY A STRONG UPPER-LEVEL
CYCLONE DIRECTLY TO THE WEST OF 96W. EARLIER SCATTEROMETER DATA
REVEALED WINDS OF 35 KTS WITHIN THE NORTHERN SEMICIRCLE, THUS, 96W IS
CURRENTLY ASSESSED AS A SUBTROPICAL STORM. DETERMINISTIC MODELS SHOW
96W TRACKING NORTHWESTWARD OVER THE NEXT 24 HOURS WITH A WEAKENING
WIND FIELD DUE TO EXTREME DRY AIR ENTRAINMENT AND HIGH VERTICAL WIND
SHEAR. TRANSITION INTO A TROPICAL CYCLONE IS ANALYZED TO BE HIGHLY
UNLIKELY DUE TO THE PREVIOUSLY MENTIONED ENVIRONMENTAL CHARACTERISTICS
ALONG WITH COOL (24-25 C) SEA SURFACE TEMPERATURES. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 33 TO 38 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1002 MB. FOR HAZARDS AND WARNINGS,
REFERENCE THE FLEET WEATHER CENTER SAN DIEGO HIGH WINDS AND SEAS
PRODUCT OR REFER TO LOCAL WMO DESIGNATED FORECAST AUTHORITY. THE
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN
THE NEXT 24 HOURS IS LOW.
(2) NO OTHER SUBTROPICAL SYSTEMS.
2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
A. TROPICAL CYCLONE SUMMARY: NONE.
B. TROPICAL DISTURBANCE SUMMARY: NONE.
C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: JUSTIFICATION FOR REISSUE: ADDED AREA IN
1.C.(1) AS A LOW.//
NNNN
THUNDERSTORM (c/o PAGASA) Thunderstorm Advisory No. 3 #VISPRSD
Issued at 10:15 AM 20 August 2026
Moderate to Heavy rainshowers with lightning and strong winds are expected over #Palawan(Brooke'sPoint, SofronioEspanola, Narra, Aborlan and PuertoPrincesaCity) within the next 30 minutes to an hour.
The above conditions are being experienced in #Palawan(Balabac and Bataraza) which may persist within 1 to 2 hours and may affect nearby areas.
Published by: VISPRSD Valid until: Aug 20, 2026 12:15 PM
Affected Areas: Palawan
THUNDERSTORM Thunderstorm Watch #MINPRSD
Issued at 10:00 AM 20 August 2026
Thunderstorm is MORE LIKELY to develop over #DavaoOccidental, #DavaoDelSur, #DavaoOriental, #DavaoDelNorte, #DavaoDeOro, #DavaoCity, #MisamisOccidental, #MisamisOriental, #Camiguin, #Bukidnon and #LanaoDelNorte within 12 hours.
Published by: MINPRSD Valid until: Aug 20, 2026 10:00 PM
Affected Areas: Davao Occidental, Davao del Sur, Davao Oriental, Davao del Norte, Davao de Oro + 6 more
THUNDERSTORM Thunderstorm Watch #VISPRSD
Issued at 10:00 AM 20 August 2026
Thunderstorm is MORE LIKELY to develop over #Palawan, #OccidentalMindoro, #Iloilo, #Guimaras, #Antique, #Capiz, #Aklan, #Cebu, #Bohol, #Siquijor, #NegrosOriental, #NegrosOccidental, #Leyte, #SouthernLeyte, #Biliran, #EasternSamar and #Samar within 12 hours.
Published by: VISPRSD Valid until: Aug 20, 2026 10:00 PM
Affected Areas: Palawan, Occidental Mindoro, Iloilo, Guimaras, Antique + 12 more
THUNDERSTORM Thunderstorm Watch #NLPRSD
Issued at 10:00 AM 20 August 2026
Thunderstorm is MORE LIKELY to develop over #IlocosNorte and #Cagayan within 12 hours.
Published by: NLPRSD Valid until: Aug 20, 2026 10:00 PM
Affected Areas: Ilocos Norte, Cagayan
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