Data health

Storm Mode / Tracked area

Other hazards: Maryland

Wall mode

4 warnings total · 0 tornado warnings · 5 alerts including watches and advisories

Current alert feed · checked

Warnings in area

5 of 5 alerts
  1. Freeze WarningWashington; Frederick; Carroll; Northern Baltimore; Extreme Western Allegany; Central and Eastern Allegany; Northwest Harford; Western Garrett; Eastern Garrett; Augusta; Rockingham; Shenandoah; Frederick; Page; Warren; Clarke; Western Highland; Eastern Highland; Western Loudoun; Northern Virginia Blue Ridge; Central Virginia Blue Ridge; Hampshire; Morgan; Berkeley; Jefferson; Hardy; Western Grant; Eastern Grant; Western Mineral; Eastern Mineral; Western Pendleton; Eastern PendletonNWS Baltimore MD/Washington DC · until warning · alerts checked
  2. Freeze WarningWarren; Potter; Elk; Cameron; Northern Clinton; Clearfield; Northern Centre; Southern Centre; Cambria; Blair; Huntingdon; Mifflin; Juniata; Somerset; Bedford; Fulton; Franklin; Tioga; Northern Lycoming; Sullivan; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; LancasterNWS State College PA · until warning · alerts checked
  3. Freeze WarningTuscarawas; Carroll; Columbiana; Coshocton; Harrison; Jefferson; Muskingum; Guernsey; Belmont; Noble; Monroe; Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Allegheny; Armstrong; Washington; Greene; Westmoreland; Westmoreland Ridges; Fayette; Fayette Ridges; Indiana; Higher Elevations of Indiana; Hancock; Brooke; Ohio; Marshall; Wetzel; Marion; Monongalia; Ridges of Eastern Monongalia and Northwestern Preston; Preston; Eastern Preston; Western Tucker; Eastern TuckerNWS Pittsburgh PA · until warning · alerts checked
  4. Freeze WarningSussex; Carbon; Monroe; Warren; Morris; Hunterdon; Berks; Lehigh; Northampton; Western Chester; Western Montgomery; Upper BucksNWS Mount Holly NJ · until warning · alerts checked
  5. Frost AdvisoryNorthwest Montgomery; Northwest Howard; Nelson; Albemarle; Greene; Madison; Rappahannock; Orange; Culpeper; Northern Fauquier; Southern Fauquier; Eastern Loudoun; Northwest Prince WilliamNWS Baltimore MD/Washington DC · until advisory · radar-alerts checked

Watched places

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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.

Agency warning geometry · no observed imagery displayed
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Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.

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 2026-10-17 00:00:00 UTC, picture retrieved 2026-10-17 06:08:57.387 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

Radar-derived cells (0) · unavailable

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

    Station and river observations (25)

    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 25 of 25 listed sources. All surface stations and retained trends · All supported gauges and forecasts

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    Water-level gauge SGSM2

    unavailable · No observation in the latest cached source list. Retained readings below are historical; an absent gauge may have fallen below action stage or stopped reporting.

    Tide gauge (coastal water level) · Straits Point (IN MLLW) · St. George Creek · -76.5, 38.138333. Units ft; datum not supplied.

    Source checked 2026-10-17 07:05:03.334Z · current.

    Stage in this gauge’s units, not a regional flood depth. Tide/lake gauges remain water levels; datum is not supplied by this feed. Historical observations and the latest forecast keep separate times.

    Retained observations: 0; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:05.234Z; oldest available reading none.

    No retained observations yet. Reload after the existing scheduled source pass runs.

    NWS forecast · current

    Highest listed forecast: 3.1 ft at 2026-10-19 14:00:00 UTC; issued 2026-10-16 18:30:00 UTC. Action stage.

    Impacts and the full forecast are read for gauges in flood; this one is at action stage.

    Gauge thresholds: action 2.5 ft; minor 3.5 ft; moderate 4 ft; major 5 ft.

    Observed reports as a table (0)
    Observed (UTC)Stage / unitsSource category / water
    No retained observations.
    Capture times, quality and provenance

    Each report keeps its observation time, first capture of this version, and the SHA-256 of the source bulk body. Corrections at the same observation time replace that point and are marked; unrelated bulk-file changes do not freshen a report.

      Only observed gauge records enter this history. Forecast maxima and forecast hydrograph points never become observations. A missing datum or unsupported flow value remains unknown.

      Observation source page · Cached readings as JSON · Official source

      Recent source changes

      Recording coverage and limits
      • warnings: retained from 2026-10-16T07:14:19.019Z through 2026-10-17T07:14:03.382Z
      • outlooks: retained from 2026-10-16T07:14:19.019Z through 2026-10-17T07:10:05.968Z
      • hydro: retained from 2026-10-16T07:14:19.019Z through 2026-10-17T07:05:03.665Z
      • analysis: retained from 2026-10-16T07:14:19.019Z through 2026-10-17T07:00:07.405Z
      • winter: retained from 2026-10-16T07:14:19.019Z through 2026-10-17T07:08:03.464Z

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

      Auto-updating checks this site’s cache every minute; each source keeps its own clock.

      Spotlight: Radar

      1 of 1

      Radar

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

      Open the radar

      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 07:13Z.

      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
      Maryland (NWS states: MD)
      Hazards
      Other 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

      Choose another storm or areaChange monitoring areaSource status

      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.