Data health
GuamSite status

Weather Center

SPC’s and WPC’s outlooks cover the lower 48 states; none is issued for Guam. Its warnings are listed below.

Current alerts

1 typhoon warning, 1 coastal flood warning and 1 high surf warning touch Guam. 1 typhoon warning 1 coastal flood warning 1 high surf warning (touching Guam)

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NWS alerts checked · Data: NOAA/NWS

Sources & update times

SPC Day 1 outlook issued · Data: NOAA/SPC

SPC Day 2 outlook issued · Data: NOAA/SPC

SPC Day 3 outlook issued · Data: NOAA/SPC

SPC discussions checked · Data: NOAA/SPC

SPC storm reports checked · Data: NOAA/SPC

WPC Day 1 outlook issued · Data: NOAA/WPC

WPC Day 2 outlook issued · Data: NOAA/WPC

WPC Day 3 outlook issued · Data: NOAA/WPC

Each feed is judged on its own clock. The masthead’s reading is the site’s publishing health, which is a different thing: a publishing delay does not make a freshly read warning stale, and a fresh check does not make an old outlook newly issued.

NWS warnings / MRMS selected rainfall: feeds current

NWS warnings: Feed current; checked .

MRMS selected rainfall: Feed current; checked .

Checked means retrieved, not newly issued. Each graphic retains its issue, observation, initialization or valid time. Site publishing status is separate.

Hazard & forecast product

Rain in the past 24 hours, MRMS radar estimate

Layers 3 on

Source: NOAA MRMS

Rain that fell: MRMS radar estimate, 24 hours, in inches

  • 0.01 to 0.1 in
  • 0.1 to 0.25 in
  • 0.25 to 0.5 in
  • 0.5 to 0.75 in
  • 0.75 to 1 in
  • 1 to 1.5 in
  • 1.5 to 2 in
  • 2 to 3 in
  • 3 to 4 in
  • 4 to 6 in
  • 6 to 8 in
  • 8 to 10 in
  • 10 in or more
  • No radar estimate
MRMS radar estimate of the rain that fell, the 24 hours to · Data: NOAA/MRMS. A measurement of the past, from radar alone: not a forecast, and not corrected to rain gauges. Warnings and watches are as of (now), not for the hours the rain fell in.Guam is outside this map, which draws the conterminous states; its warnings are listed below.
Everything on the map, as a list
  • Rain that fell in the 24 hours to : up to 6 to 8 in anywhere on the map, by radar estimate

Coming days · Guam

2026-10-17Severe storms: Outside lower-48 outlook coverageFlash flooding: Outside lower-48 outlook coverage2026-10-17Severe storms: Outside lower-48 outlook coverageFlash flooding: Outside lower-48 outlook coverage2026-10-18Severe storms: Outside lower-48 outlook coverageFlash flooding: Outside lower-48 outlook coverage

These are daily outlooks, not arrival times. Days 4–8 retain SPC’s predictability and potential-too-low wording in the dated outlook controls.

Severe storms

General thunderstorms at its highest nationally. SPC’s convective outlook, on its own scale.

View severe outlook

Recent reports

Reporting period: 12Z 16 Oct – 12Z 17 Oct

0 tornado · 0 wind · 0 hail in Guam

Preliminary reports: a count of reports, not of storms. None reported is not proof that nothing happened.

View reports: map, table & download

No watches or mesoscale discussions in Guam. Watches, discussions and warnings in the Live tracker

Warnings in Guam

3 warnings touching Guam

3 warnings touch Guam, most urgent first. A warning across a state line is counted here and in the other state.

NWS alerts checked · Data: NOAA/NWS

Since : no change in the warnings.

Warnings 3

All 3 warnings touching Guam, with their full text, in the Live tracker

56 warnings elsewhere in the country: the national list.

Not an official warning service. Warnings and watches are the National Weather Service’s, outlooks and reports the Storm Prediction Center’s and the Weather Prediction Center’s (Data: NOAA/NWS, NOAA/SPC, NOAA/WPC). When a warning is issued for you, act on it, and use weather.gov or a NOAA Weather Radio for where you are.