Data health

Storm Mode / Tracked area

Flash flooding: North Carolina

Wall mode

3 warnings total · 0 tornado warnings · 9 alerts including watches and advisories

Current alert feed · checked

Warnings in area

9 of 9 alerts
  1. Coastal Flood WarningHatteras Island; Ocracoke IslandNWS Newport/Morehead City NC · until warning · alerts checked
  2. Freeze WarningAvery; Madison; Yancey; Mitchell; Swain; Haywood; Buncombe; Graham; Northern Jackson; Macon; Southern JacksonNWS Greenville-Spartanburg SC · until warning · alerts checked
  3. Freeze WarningAshe; Alleghany; Watauga; Tazewell; Smyth; Bland; Giles; Wythe; Pulaski; Montgomery; Grayson; Carroll; Floyd; Craig; Alleghany; Bath; Mercer; Summers; Monroe; Eastern Greenbrier; Western GreenbrierNWS Blacksburg VA · until warning · alerts checked
  4. Coastal Flood WatchEastern CurrituckNWS Wakefield VA · until watch · radar-alerts checked
  5. Coastal Flood WatchChesapeake; Suffolk; Norfolk; PortsmouthNWS Wakefield VA · until watch · radar-alerts checked
  6. Coastal Flood WatchVirginia BeachNWS Wakefield VA · until watch · radar-alerts checked
  7. Frost AdvisoryFannin; Gilmer; Union; Towns; Dawson; Lumpkin; WhiteNWS Peachtree City GA · until advisory · radar-alerts checked
  8. Frost AdvisorySurry; Wilkes; Roanoke; Botetourt; Rockbridge; Patrick; Franklin; Bedford; AmherstNWS Blacksburg VA · until advisory · radar-alerts checked
  9. Frost AdvisoryRabun; Habersham; Alexander; Transylvania; Henderson; Caldwell Mountains; Greater Caldwell; Burke Mountains; Greater Burke; McDowell Mountains; Eastern McDowell; Rutherford Mountains; Polk Mountains; Oconee Mountains; Pickens Mountains; Greenville MountainsNWS Greenville-Spartanburg SC · until advisory · radar-alerts checked

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Layers

Map

NWS’s polygons as issued, or the zones a zone-issued alert names; SPC’s watches by their counties. Checked . Data: NOAA/NWS, NOAA/SPC.

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Alert outlines: NOAA/NWS; cell points/observed segments: IEM/NEXRAD. A warning polygon is not a tornado footprint.

Lightning activity — GOES GLM

Total lightning, including in-cloud activity. Not ground-strike locations or a safe-to-go-outside signal.

Cached lightning observations have not loaded. An empty map is not zero lightning.

Cached lightning source details and text readings

Snow analysis — NOHRSC

Source-rendered snow depth and snow water equivalent for the lower 48. History changes this snow picture only; warnings and radar keep their own clocks.

Stored snow depth · footprint valid 2026-10-18 06:00:00 UTC, picture retrieved 2026-10-18 12:23:04.796 UTC.

No NOHRSC picture displayed on the interactive map.

  • 0 - 0.39 in
  • 0.39 - 2.0 in
  • 2.0 - 3.9 in
  • 3.9 - 9.8 in
  • 9.8 - 20 in
  • 20 - 39 in
  • 39 - 59 in
  • 59 - 98 in
  • 98 - 197 in
  • 197 - 295 in
  • 295 - 394 in
  • 394 - 787 in
NOHRSC snow analysis for the lower 48; see the adjacent source legend and time qualification
NOAA/NWS/NOHRSC’s original picture and legend. No station or address value is inferred.

NOHRSC footprint times are metadata; pixel analysis time is not independently verified. Snow-depth pixels have previously differed from the footprint time. This is modeled/assimilated snow analysis, not a measurement at a place. Unshaded and no-data areas do not establish zero snow.

Snow pictures, retained history and source provenance

Change time or forecast product

Replay uses retained source bytes. Recording begins with activation; missing history is not clear weather.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

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Radar-derived cells (0) · current

Collector checked ; feed generated . Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

    Station and river observations (70)

    Surface source current; observed water-level source current. Each reading keeps its own time. Map markers show at most 500 stations and 500 gauges; the complete source directory is paginated.

    Circle: surface station; square: water-level gauge. Filled: current reading and source; hollow: stale, unconfirmed or missing observation. Marker color is not a hazard category. Enable “Stations and gauges” in Layers to inspect them on the map.

    Showing 70 of 70 listed sources. All surface stations and retained trends · All supported gauges and forecasts

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    Current NWS warning

    Hatteras Island; Ocracoke Island

    Coastal Flood Warning

    Issued
    Updated
    Ends as issued
    Office
    NWS Newport/Morehead City NC
    Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth. Swimmers should remain out of the water due to dangerous surf conditions.

    Official NWS warning ↗

    The polygon is a warned area, not a tornado footprint. NWS detection tags are independent of radar algorithms and reports.

    Relevant watched places

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    Full official message

    Coastal Flood Warning issued October 18 at 3:24AM EDT until October 20 at 5:00PM EDT by NWS Newport/Morehead City NC

    * WHAT...For the Coastal Flood Warning, 2 to 4 feet of
inundation above ground level expected in low- lying areas
near shorelines and tidal waterways. For the High Surf
Advisory, large breaking waves of 9 to 14 feet in the surf
zone. For the Beach Hazards Statement, dangerous rip currents,
large breaking waves, and strong longshore currents in the
surf zone.

* WHERE...Hatteras Island.

* WHEN...For the Coastal Flood Warning, until 5 PM EDT Tuesday.
For the Beach Hazards Statement, from Sunday morning through
Sunday evening.

* IMPACTS...2 to 4 feet of inundation above ground level is
expected in some areas near shorelines and tidal waterways
resulting in an elevated threat of property damage. Flooding
will extend inland from the waterfront threatening some homes
and businesses. Numerous road closures and flooding of
vehicles will be possible. Vulnerable portions of NC-12 may be
inundated, especially around high tide. There is a possibility
of being stranded on Hatteras Island for multiple days. This
could be life threatening if you have an emergency. Dangerous
swimming and surfing conditions and localized beach erosion.
Rip currents can sweep even the best swimmers away from shore
into deeper water. Dangerous shore break can throw a swimmer
or surfer head first into the bottom causing neck and back
injuries. Strong longshore currents will create dangerous
swimming conditions.

* ADDITIONAL DETAILS...This has the potential to be a long
duration event bringing more significant ocean overwash impacts
to vulnerable oceanside areas through multiple high tide cycles
into the work week. Minor soundside water level rises will also
be possible.
    Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.

Swimmers should remain out of the water due to dangerous surf
conditions.
    Warning-message history (8)

    Data: NOAA/NWS · KMHX.CF.W.0003

    Recent source changes

    Recording coverage and limits
    • warnings: retained from 2026-10-17T12:45:33.982Z through 2026-10-18T12:45:06.904Z
    • outlooks: retained from 2026-10-17T12:45:33.982Z through 2026-10-18T12:45:07.160Z
    • hydro: retained from 2026-10-17T12:45:33.982Z through 2026-10-18T12:45:07.092Z
    • analysis: retained from 2026-10-17T12:45:33.982Z through 2026-10-18T12:45:10.349Z
    • winter: retained from 2026-10-17T12:45:33.982Z through 2026-10-18T12:38:05.100Z

    Source-message history is not recorded imagery replay. Recorded radar/satellite imagery is not available in this view.

    Checks every minute; each layer keeps its own time.

    Spotlight: Flash-flood risk, Day 1

    1 of 4

    Flash-flood risk, Day 1

    • Marginal

    WPC’s excessive rainfall outlook, to , issued : a chance of flash flooding, in four categories. Data: NOAA/WPC.

    Rain expected and rain that fell

    WPC’s rain forecast and MRMS’s radar estimate of the rain that fell, on the Briefing’s map for the area.

    Open Rain & rivers

    Data: NOAA/WPC, NOAA/NSSL MRMS.

    Radar

    NOAA’s radar for the area, loaded by your browser as on the Radar page.

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    Live tiles; the radar keeps no last-good copy.

    What changed, last 60 minutes

    since , when this server began watching this area

    Nothing has changed since 12:45Z.

    The products’ own words and times, and what is no longer in force since the last read. Never written by AI.

    Monitoring area, legacy alert summary and selection rules
    Area
    North Carolina (NWS states: NC)
    Hazards
    Flash flood warnings, watches and advisories, and the forecasts for them
    Window
    In force now, with the next days of SPC’s and WPC’s products
    Made by
    This address: anyone can make one, and nothing is stored. Change the area or hazards

    An area you chose, not a storm’s footprint: everything here is in force in this area, never “from this storm”.

    In force in this area

    No warning, watch or advisory for these hazards is in force in this area.

    NWS’s alerts checked : a successful check, so this is none in force, not “can’t tell”.

    Sources

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    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.