Data health

Storm Mode / Tracked area

Winter: Tennessee

Wall mode

0 warnings total · 0 tornado warnings · 2 alerts including watches and advisories

Current alert feed · checked

Warnings in area

2 of 2 alerts
  1. Freeze WatchAshe; Watauga; Tazewell; Smyth; Bland; Wythe; Grayson; Mercer; Summers; Monroe; Eastern Greenbrier; Western GreenbrierNWS Blacksburg VA · until watch · radar-alerts checked
  2. Freeze WatchAvery; Madison; Yancey; Mitchell; Swain; Haywood; Buncombe; Graham; Northern Jackson; Macon; Southern JacksonNWS Greenville-Spartanburg SC · until watch · radar-alerts checked

Watched places

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Layers

Map

  • Freeze Watch 2

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
North ↑

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 2026-10-16 18:00:00 UTC, picture retrieved 2026-10-17 03:08:05.170 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.

    Inspector

    Choose a warning, cell or place

    Select a row or map feature for its official details. Overlapping features offer a choice; all peer warnings remain in the list.

    Recent source changes

    Recording coverage and limits
    • warnings: retained from 2026-10-16T03:59:52.967Z through 2026-10-17T03:59:02.907Z
    • outlooks: retained from 2026-10-16T03:59:52.967Z through 2026-10-17T03:55:05.244Z
    • hydro: retained from 2026-10-16T03:59:52.967Z through 2026-10-17T03:55:04.490Z
    • analysis: retained from 2026-10-16T03:59:52.967Z through 2026-10-17T03:45:15.535Z
    • winter: retained from 2026-10-16T03:59:52.967Z through 2026-10-17T03:53:02.974Z

    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: Winter Storm Severity Index

    1 of 7

    Winter Storm Severity Index

    WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”

    • Winter Weather Area highest in this area
    • Minor Impacts
    • Moderate Impacts
    • Major Impacts
    • Extreme Impacts

    Highest in this area, by day and by cause

    Day 1
    Winter Weather Area
    Day 2
    nothing drawn
    Day 3
    nothing drawn
    Snow amount, Days 1–3
    Winter Weather Area
    Snow load, Days 1–3
    nothing drawn
    Ice, Days 1–3
    nothing drawn
    Blowing snow, Days 1–3
    nothing drawn

    Each day and cause on the Winter tab, with its own issue time

    WPC’s WSSI, overall impact, Days 1–3, valid to , issued . WPC issues each day and cause on its own clock. Not a warning, and not a chance. Data: NOAA/NWS/WPC.

    Chance of Moderate impacts or worse, Day 1

    WPC: “WSSI does not depict official warnings and should always be used in context with official NWS forecasts and warnings.”

    • 5–10%
    • 10–20%
    • 20–30%
    • 30–40%
    • 40–50%
    • 50–60%
    • 60–70%
    • 70–80%
    • 80–90%
    • 90–95%
    • 95% or more

    Each level and day on the Winter tab

    WPC’s WSSI-P, the 24 hours to , WPC’s forecast from . Each band runs to the next. Data: NOAA/NWS/WPC.

    Chance of at least 4 inches of snow, Day 1

    WPC gives no chance of 4 inches of snow or more in this area over the next three days, so Day 1’s 4 inches is shown.

    • Slight: at least 10%
    • Moderate: at least 40%
    • High: at least 70%

    Every day and amount on the Winter tab

    WPC’s Probabilistic Winter Precipitation Forecast, to , issued . Outlines, as WPC draws them. Data: NOAA/NWS/WPC.

    Winter watches, warnings and advisories

    • Freeze Watch 2 2 not yet in effect · until · NWS Blacksburg VA, NWS Greenville-Spartanburg SC

    NWS’s winter and cold alerts in force in the area, by event as issued, each counted once, with the offices that issued them and the latest end. Data: NOAA/NWS.

    Snow on the ground

    NOHRSC snow depth and snow water equivalent use the source’s original pictures and legends, with qualified footprint times. Open the cached source page for availability and retained history. This wall has no snow picture to rotate; missing imagery does not mean no snow.

    NOHRSC snow analysis and retained pictures

    Data: NOAA/NWS/NOHRSC. Snow analysis, not a measurement at a place.

    WPC’s heavy snow and icing discussion

    The whole discussion

    Issued , for to . WPC’s words, as written. Data: NOAA/NWS/WPC.

    Radar, winter preset

    The Radar page’s winter preset over the area: HRDPS forecast snow with NWS’s warnings on top, loaded by your browser. A forecast, labelled as one there.

    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 03:32Z.

    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
    Tennessee (NWS states: TN)
    Hazards
    Winter 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 2

    1. Freeze Watch22 not yet in effect · until 18 Oct 13:00Z
    Every alert in this area, most urgent first
    1. Freeze WatchAshe; Watauga; Tazewell; Smyth; Bland; Wythe; Grayson; Mercer; Summers; Monroe; Eastern Greenbrier; Western GreenbrierFrom · until · NWS Blacksburg VA · drawn over this area
    2. Freeze WatchAvery; Madison; Yancey; Mitchell; Swain; Haywood; Buncombe; Graham; Northern Jackson; Macon; Southern JacksonFrom · until · NWS Greenville-Spartanburg SC · drawn over this area

    Most urgent first, by the Briefing’s ranking. Checked .

    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.