674 
WGMY50 PGUM 190505
FFWGUM
GUC010-190600-
/O.NEW.PGUM.FF.W.0024.260819T0505Z-260819T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tiyan GU
305 PM ChST Wed Aug 19 2026

The National Weather Service in Tiyan has issued a

* Flash Flood Warning for...
  Guam...

* Until 400 PM ChST.

* At 305 PM ChST, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 1.2 and 2.4 inches of
  rain have fallen. Additional rainfall amounts of 2 to 3 inches are
  possible in the warned area. Flash flooding is ongoing or expected
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada,
  Yona, Hagatna Heights, Andersen AFB, Talofofo, Mongmong-Toto-Maite,
  Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita and Umatac.

This Flash Flood Warning is for the entirety of Guam.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.

&&

LAT...LON 1334 14461 1340 14463 1342 14462 1344 14460
      1348 14464 1350 14475 1353 14478 1366 14483
      1368 14484 1365 14490 1363 14491 1361 14497
      1359 14497 1351 14495 1341 14481 1327 14479
      1323 14475 1321 14464 1324 14463 1327 14465

FLASH FLOOD...RADAR INDICATED

$$

EM


316 
WGMY50 PGUM 190544
FFWGUM
GUC010-190700-
/O.EXT.PGUM.FF.W.0024.000000T0000Z-260819T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tiyan GU
344 PM ChST Wed Aug 19 2026

The National Weather Service in Tiyan has extended the

* Flash Flood Warning for...
  Guam...

* Until 500 PM ChST.

* At 344 PM ChST, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 2.2 and 3.4 inches of
  rain have fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada,
  Yona, Hagatna Heights, Andersen AFB, Talofofo, Mongmong-Toto-Maite,
  Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita and Umatac.

Heavy rains from earlier have eased, but stratiform rain will
continue for at least the next hour as roads remain flooded,
especially in the Hagatna area and potentially parts of southern
Guam.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.

&&

LAT...LON 1334 14461 1340 14463 1342 14462 1344 14460
      1348 14464 1350 14475 1353 14478 1366 14483
      1368 14484 1365 14490 1363 14491 1361 14497
      1359 14497 1351 14495 1341 14481 1327 14479
      1323 14475 1321 14464 1324 14463 1327 14465

FLASH FLOOD...RADAR INDICATED

$$

EM