Flash Flood Warning
N
Issued by NWS Tiyan GU
⏳ In force until Sat 17 Oct, 22:30 📍 Guam, GU (approximate) 🕑 5 h ago
FFWGUM 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 throug…
🗃 Archived report - it is no longer on the live map. Pages are kept for 30 days.
📡 CAP alert details
Common Alerting Protocol
Official alert linked
▾
📡 CAP alert details
Common Alerting Protocol
⚠
SeveritySevere
⏱
UrgencyImmediate
❓
CertaintyLikely
EventFlash Flood Warning
Response typeAvoid
CategoryMet
Affected areaGuam, GU
Issuing authorityNWS Tiyan GU
ContactNot supplied
🕓 Alert timing · EAT
Sent2026-10-18T03:23:00+10:00
Effective2026-10-18T03:23:00+10:00
Onset2026-10-18T03:23:00+10:00
Expires2026-10-18T05:30:00+10:00
📋 Official instructions
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.📄 Message details
Alert identifierurn:oid:2.49.0.1.840.0.cd2b16d8066810fabc926b9874f3602c4569d069.001.1
Message typeUpdate
Senderw-nws.webmaster@noaa.gov
ScopePublic
CAP statusActual
Related messagesurn:oid:2.49.0.1.840.0.186b246c6f9ab08c17bb9c37c0282eaa81a8a198.001.1 urn:oid:2.49.0.1.840.0.30438307a09b9d065860127f9a4633169499f03b.001.1
ⓘ CAP fields populate when an official alert is linked.
🛡 Safety advice
General guidance for this type of incident - not official instructions.
- 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.
- Avoid flooded roads, rivers and drainage channels; do not walk or drive through moving water.
- Move valuables and people to higher ground if water is rising near you.
- Follow local authority and Red Cross updates for the area.
📰 Story summary
From the report shown in the feed:
- FFWGUM 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 throug…
ⓘ News summary · read the original report for full context.
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