263 

WGMY50 PGUM 171723

FFWGUM

GUC010-171930-

/O.EXT.PGUM.FF.W.0036.000000T0000Z-261017T1930Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/



BULLETIN - EAS ACTIVATION REQUESTED

Flash Flood Warning

National Weather Service Tiyan GU

323 AM ChST Sun Oct 18 2026



The National Weather Service in Tiyan has extended the



* Flash Flood Warning for...

  Guam...



* Until 530 AM ChST.



* At 323 AM ChST, Doppler radar indicated thunderstorms producing

  heavy rain across the warned area with the inner eyewall of Champi

  approaching southern Guam. Between 2 and 4 inches of rain have

  fallen. Flash flooding is ongoing or expected to begin shortly and

  will last through Sunday morning.



  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.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Turn around, don't drown when encountering flooded roads. Most flood

deaths occur in vehicles.



Be especially cautious at night when it is harder to recognize the

dangers of flooding.



&&



LAT...LON 1344 14459 1346 14460 1348 14462 1350 14475

      1353 14478 1366 14483 1368 14484 1368 14487

      1363 14491 1362 14497 1359 14497 1351 14494

      1341 14481 1327 14479 1323 14476 1321 14464

      1324 14463 1327 14465 1333 14461 1340 14463



FLASH FLOOD...RADAR INDICATED



$$



CO