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TROPICAL CYCLONE ADVISORY: ABPW10 PGTW 261500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH PACIFIC OCEANS REISSUED/261500Z-270600ZMAY2026// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/261451ZMAY2026// AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.// RMKS/ 1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: (1) THE AREA OF CONVECTION (INVEST 99W) PREVIOUSLY LOCATED NEAR 8.3N 138.5E IS NOW LOCATED NEAR 8.7N 137.2E, APPROXIMATELY 77 NM SOUTHWEST OF YAP. ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND A PARTIAL 261216Z ASCAT PASS DEPICT A SWATH OF 25 KT WINDS ON THE WESTERN AND SOUTHERN PERIPHERIES OF AN ELONGATED AREA OF ROTATION WHICH EXTENDS FROM THE LOW LEVEL CIRCULATION CENTER (LLCC) TOWARDS THE SOUTHWEST TOWARDS PALAU. ENVIRONMENTAL ANALYSIS REVEALS A FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH MODERATE POLEWARD UPPER-LEVEL OUTFLOW, LOW TO MODERATE VERTICAL WIND SHEAR (10-15 KTS), AND WARM SEA SURFACE TEMPERATURES (29-30 C). GLOBAL DETERMINISTIC AND ENSEMBLE MODELS AGREE ON 99W TRACKING GENERALLY NORTHWESTWARD OVER THE NEXT 24-48 HOURS AS IT CONTINUES TO CONSOLIDATE AND STEADILY INTENSIFY. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO HIGH. SEE REF A (WTPN21 PGTW 261500) FOR FURTHER DETAILS. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE. 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: UPGRADED AREA IN PARA. 1.B.(1) TO HIGH.// NNNN
THUNDERSTORM (c/o PAGASA)

Thunderstorm Advisory No. 4 #VISPRSD
Issued at 04:21 AM 27 May 2026

Moderate to Heavy rainshowers with lightning and strong winds are being experienced in #Iloilo(Carles, SanDionisio, Concepcion) and #Guimaras(NuevaValencia) which may persist within 1 to 2 hours and may affect nearby areas.

Published by: VISPRSDValid until: May 27, 2026 06:21 AM
Affected Areas: Iloilo, Guimaras
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METRIC | IMPERIAL
Updated: 05/27/2026 @ 4:30am  
Temperature Current Conditions Forecast / Storm Prediction
Outside Temperature: Warmer 0.3°C than last hour.

29.0°C

Heat Index:  37.1°C
Feels like:  37°C
Warm
Indoor Temperature

94.4°C

Max Humidex:  43.9°C
Indoor Humidity: %
High Today
30.4°C
12:01 AM 		Low Today
28.5°C
3:17 AM
Yest High
35.9°C
2:16 PM 		Yest Low
29.0°C
5:03 AM
Sta* High
37.0°C
4/28/2026
 Sta* Low
21.4°C
1/24/2026
Space Weather Status
X-Ray: C1.6 Max: C2.5
NORMAL
Geomagnetic Field: 1
QUIET
Partly cloudy Partly cloudy ,
Partly cloudy

Calm Wind:  NE
0.0
Gusting to:
 0.0 km/h
Current Rain Rain Total:
0.6 mm
Rain Warning Rain Rate:
Chandler Burning Index: LOW Current CBI
Fire Danger:
-0.4 % of 100%
LA NINA / EL NINO
EL Nino and La Nina Scripted by PIMOHWEATHER Philippines
Wednesday
Rain, Partially cloudy rain
Rain, Partially cloudy with 35°C
27°C 		Thursday
Rain, Partially cloudy rain
Rain, Partially cloudy with 34°C
27°C 		Friday
Rain, Overcast rain
Rain, Overcast with 34°C
27°C
Official Record High
99W INVEST LPA 37 kph OUTSIDE PAR
VOLCANO THERMAL ALERT STATUS
TAAL
Volcano Alert Status
 MAYON
Volcano Alert Status
 PINATUBO
Volcano Alert Status
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.3°C since last hour. 27.2°C
Last Hour: Decreased 0.3°C since last hour. 0.3°C
High 12:10 AM: 28.4°C
Low 3:17 AM: 27.1°C
Record High: 30.2°C on
May-26-2026
Record Low: 16.2°C on
Mar-14-2026
Wetbulb: 27.7°C


Today: 0.60 mm
Yesterday: 0.00 mm
Last 7 Days: 0.90 mm
May Rain: 54.60 mm
May to Date
  Avg:10 		0.00 mm
May to Date
  Diff from Avg:10 		Over 54.6 mm for the month 54.60 mm
May Avg: 200.30 mm
Diff from Avg: Under 145.7 mm for the month 145.70 mm
Season:1 117.6 mm
YTD
  Avg:11 		199.40 mm
YTD
  Diff from Avg:11 		Under 81.8 mm for the year 81.80 mm
Last Rain
Time/Date: 		May-27-2026
at 2:58 AM
28 rain days in 2026
8 days in May
0 days since last rain
Current: NE  0.0 km/h
Highest Speed: 7.4 km/h
1Hr Average: 0.1 km/h
Wind Run: 8.02 km
Wind Gust
Current: 0.0 km/h
Today: 16.7 km/h 12:03 AM
Month: 100.8 km/h May-13
Year: 100.8 km/h May-13
Record Gust: 100.8 km/h
May-13-2026
Sunlight:
12 hrs 54 min 19 sec
of Sunlight Today
Which is 24 sec Longer
Than Yesterday


(Noon)
graph (Midnight)

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LAST QUARTER, 10 days, 0 hours, 47 minutes in cycle
50%
Illuminated
Outside Humidity Barometer
Current: Decreased 3% since last hour. 90%
Last Hour: Decreased 3% since last hour. 3%
High 3:04 AM: 93%
Low 1:37 AM: 85%
Record High: 99%
Dec-10-2025
Record Low: 42%
Apr-7-2026
Current: Falling 0.2 hPa/hr 1006.5 hPa
Last Hour: Steady
High 12:02 AM: 1007.8
Low 2:47 AM: 1006.1
Record High: 1017.0 hPa
Jan-24-2026
Record Low: 1001.5 hPa
May-12-2026
Cooling Degree Days Tide Heat Index Air Quality
Today: 2.1
May: 332.8
2026 to Date: 1170.3
Heating Degree Days
2026 to Date: 0.0

2 hours, 57 minutes to high tide at
07:45 AM PST
Current: 37.1°C
High 12:10am: 41.9°C
Yesterday: 54.4°C
Record: 55.7°C
May-24-2026

60

Moderate

PM2.5: 16.15 ug/m3 PM10: 20 ug/m3

Last Updated: 2026-05-27 04:48:48 PHT
UV Summary/Forecast Solar Summary
High Yest:   10.0 @ 8:40 AM
May-27

12.5 		May-28

12.4 		May-29

12.8
High Yest:   690.1 @ 8:40 AM
Sun Hours Today:
00:00
   This Month: 50:06 Hrs
Rise: 5:26 am  Set: 6:20 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Early Morning
YTD Avg Temp: 27.7°C
Sunrise: 5:26 am
Sunset: 6:20 pm
Moonrise: 2:59 pm
Moonset: 2:52 am
Full Moon: 08:46 UTC May 31 2026
Next Eclipse:
Image
12 Aug 2026 (79 days away): Total solar eclipse Thu, 13 Aug 2026 01:47:00 AM PST
Updated at Midnight
Current ET: 0.50 mm
7-Days Rain: 0.90 mm
7-Days ET: 16.70 mm
7-Day: 15.8 mm water in deficit of what evaporated in last 7 days. 15.8 mm
May: 115.8 mm water in deficit of what evaporated this month. 115.8 mm
Solar HF Condition
HIGHS: LOWS:
37.0°C
Apr-28-2026 		21.4°C
Jan-24-2026
Daytime Records
  34.1°C
May-23-2026 		  23.4°C
Dec-20-2025
Nitetime Records
  31.6°C
Apr-05-2026 		  23.4°C
Jan-02-2026
ICN:4 | S3C2:5 | Ajax 3.xx
ISS:Ok | CON:%vpconsolebattery% | RCP:%vpreception2%
METRIC | IMPERIAL
Updated: 05/27/2026 @ 4:30am  
1 Rain season in the Philippines: June 1st to Oct 31st.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   6 Air Quality Index is provided by Luftdaten System esp8266 and is updated every 5 mins..   10 Historical average only to day 27 of just the month of May for this station since 2016.   11 Historical average rain this season to day 27 of May for this station since 2016.
 VC Weather Forecast  -   with local Weather Outlook for Wednesday & Thursday
Wednesday
Rain, Partially cloudy rain
Rain, Partially cloudy
35°C
27°C 		VC forecast: Becoming cloudy in the afternoon with storms possible. Chance of precipitation (rain) 74%. High: 35°C. Low: 27°C. Wind SSW 21->22 km/h. UV Index 10.
Local Weather Advisory:

Southwesterly Windflow affecting Palawan and the western section of Mindanao. Trough of Tropical Depression (TD) affecting the rest of Mindanao.
 Thursday
Rain, Partially cloudy rain
Rain, Partially cloudy
34°C
27°C 		VC forecast: Partly cloudy throughout the day with storms possible. Chance of precipitation (rain) 81%. High: 34°C. Low: 27°C. Wind SSW 16->12 km/h. UV Index 9.
 VC Short Term Weather Forecast
Friday
Rain, Overcast rain
Rain, Overcast 		Saturday
Rain, Partially cloudy rain
Rain, Partially cloudy 		Sunday
Rain, Partially cloudy rain
Rain, Partially cloudy 		Monday
Rain, Partially cloudy rain
Rain, Partially cloudy 		Tuesday
Rain, Overcast rain
Rain, Overcast 		Wednesday
Rain, Overcast rain
Rain, Overcast 		Thursday
Rain, Overcast rain
Rain, Overcast
34°C
27°C 		34°C
27°C 		33°C
27°C 		31°C
27°C 		28°C
26°C 		29°C
25°C 		28°C
26°C
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