Weather Center: Northern Mariana Islands

Current alerts

1 typhoon warning, 1 tropical storm warning, 1 coastal flood warning and 1 high surf warning touch Northern Mariana Islands. 1 typhoon warning 1 tropical storm warning 1 coastal flood warning 1 high surf warning (touching Northern Mariana Islands)

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NWS alerts checked 04:24Z · Data: NOAA/NWS

Sources & update times

SPC Day 1 outlook issued 00:50Z · Data: NOAA/SPC

SPC Day 2 outlook issued 16 Oct 17:24Z · Data: NOAA/SPC

SPC Day 3 outlook issued 16 Oct 19:22Z · Data: NOAA/SPC

SPC discussions checked 04:24Z · Data: NOAA/SPC

SPC storm reports checked 04:20Z · Data: NOAA/SPC

WPC Day 1 outlook issued 00:56Z · Data: NOAA/WPC

WPC Day 2 outlook issued 16 Oct 19:17Z · Data: NOAA/WPC

WPC Day 3 outlook issued 16 Oct 19:17Z · 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 / SPC selected outlook: feeds current

NWS warnings: Feed current; checked 04:24Z.

SPC selected outlook: Feed current; checked 04:20Z.

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

Potential too low: SPC expects too little severe weather to outline a 15% area. Predictability too low: the forecasts differ too much to place an area; severe storms are not ruled out. Neither means no hazardous weather.

Hazard & forecast product

Days 4–8 carry one product: SPC’s chance of any severe storm, outlined at 15% and 30%.

SPC Day 8 outlook, any severe, Friday 23 Oct

Source: SPC

Now, not forecast: Current warnings as of 04:24Z are drawn over the outlook for Friday 23 Oct, the warnings hatched so the forecast shows through. They are in force now; the outlook is for its own period. Show the forecast alone

Forecast: SPC’s scale

SPC Day 8 outlook, any severe: Potential too low

SPC Day 8 outlook, any severe, valid 23 Oct 12:00Z to 24 Oct 12:00Z, issued 16 Oct 07:52Z · Data: NOAA/SPC. Warnings and watches are as of 04:24Z (now), not for the outlook’s period.Northern Mariana Islands is outside this map, which draws the conterminous states; its warnings are listed below.

Everything on the map, as a list

SPC Day 8 outlook, any severe: Potential too low

Briefing details · Where, When, Main hazards

Friday planning outlook for Northern Mariana Islands

SPC Days 4–8 · planning

Highest anywhere in Northern Mariana Islands: no outlook here

SPC issues outlooks for the lower 48 states only; Northern Mariana Islands’s warnings are listed with the current alerts.

Where: No area is outlined anywhere for this day.
When: 23 Oct 12:00Z to 24 Oct 12:00Z: SPC’s Day 8, counted from its issuance at 16 Oct 07:52Z. No time of day is given.
Prepare: No preparation is indicated by this planning outlook. Check again as the day comes closer.

Official discussion

SPC’s discussion covers the whole country and all five days, not Northern Mariana Islands alone.

SPC Day 4–8 Convective Outlook, issued 16 Oct 07:54Z · Data: NOAA/SPC

000
ACUS48 KWNS 160754
SWOD48
SPC AC 160752

Day 4-8 Convective Outlook  
NWS Storm Prediction Center Norman OK
0252 AM CDT Fri Oct 16 2026

Valid 191200Z - 241200Z

...DISCUSSION...
A rather stagnant upper-air pattern will be in place across the
CONUS into early next week, with an upper ridge continuing over the
central U.S. as a mid-level cut-off low meanders along the Atlantic
coastline and an upper trough gradually amplifies along the West
Coast. By the middle to end of next week, the West Coast upper
trough will advance eastward toward the Rockies, encouraging surface
lee troughing and subsequent low-level moisture return (albeit
modest) across the Great Plains states. Thunderstorm development is
possible, especially across portions of the southern High Plains
Days 6-7 (next Wednesday-Thursday). However, deterministic guidance
suggests that little overlap of meaningful buoyancy and vertical
wind shear will take place over the southern High Plains next
Wednesday-Thursday, with calibrated ML/AI guidance only hinting at a
severe threat that will be isolated at best. Therefore, severe
probabilities have been withheld this outlook.

..Squitieri.. 10/16/2026

SPC’s Days 4–8 page

Forecast details

SPC’s Days 4–8 outlook outlines where it sees at least a 15% or a 30% chance of severe thunderstorms within 25 miles of a point on each day. It has no categories and no hazard of its own. “Potential too low” means SPC expects too little severe weather to outline 15%; “Predictability too low” means the forecasts differ too much to place an area, and severe storms are not ruled out. A day further out is less certain than Days 1–3. SPC’s Days 4–8 page.

Coming days · Northern Mariana Islands

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

Flash-flood risk

WPC outlines no excessive rainfall area at this scope. WPC’s Excessive Rainfall Outlook: a separate forecast with its own scale.

View flash-flood risk

Recent reports

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

0 tornado · 0 wind · 0 hail in Northern Mariana Islands

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 Northern Mariana Islands. Watches, discussions and warnings in the Live tracker

Warnings in Northern Mariana Islands

4 warnings touching Northern Mariana Islands

4 warnings touch Northern Mariana Islands, most urgent first. A warning across a state line is counted here and in the other state.

NWS alerts checked 04:24Z · Data: NOAA/NWS

Since 03:25Z: no change in the warnings.

Warnings 4

Typhoon Guam Coastal Waters; Rota Coastal Waters; Guam; Rota until 20:00Z crosses Guam and Northern Mariana Islands Track: Typhoon Warning, Guam Coastal Waters; Rota Coastal Waters; Guam; Rota
Tropical storm Tinian Coastal Waters; Saipan Coastal Waters; Tinian; Saipan until 20:00Z Track: Tropical Storm Warning, Tinian Coastal Waters; Saipan Coastal Waters; Tinian; Saipan
Coastal flood Guam; Rota; Tinian; Saipan until 18 Oct 18:00Z crosses Guam and Northern Mariana Islands Track: Coastal Flood Warning, Guam; Rota; Tinian; Saipan
High surf Guam; Rota; Tinian; Saipan until 18 Oct 18:00Z crosses Guam and Northern Mariana Islands Track: High Surf Warning, Guam; Rota; Tinian; Saipan

All 4 warnings touching Northern Mariana Islands, with their full text, in the Live tracker

55 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.

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