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Severe weather analysis

Observations and analyses of the atmosphere now, from NWS, WPC and SPC. Not a forecast and not a warning: for those, see the Briefing and the Live tracker.

Surface observations / WPC surface analysis: feeds current

Surface observations: Feed current; checked .

WPC surface analysis: Feed current; checked .

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

Surface: what stations observe and WPC analyses

Occluded frontStationary frontCold frontCold frontStationary frontCold frontH1037H1038H1036H1027H1016L996L1006L1015L10153834473444333327463145395849552439355440733426235332333247283432353334304433282342384938302252234641502843413025322332303228362859594132555528273232552552343027363639284343592130163455143413632237057483055365439797749414841342555255454413041373625793451514223694679755223433072636330552750393831463240257671767532267552484841235959716946404336393654495345393070633932514444384632724471336137817345234330553260485144483457396345736943345342747058324437827050286423463853405342593446225137724337345037623779704944453239335450533164512926524448393425621746396363544140296660623548305837612575735541542339345349481876698477817045405248714137307350373056383934787670637168523961344131613257335246573158394824521258474933393461215046502747386427813461514719451652416338666470665524402784436229844882303930776852215040704179774423847588505723504591544846867388758670883257545450884384758279
The lower 48: one station shown in each small area of the map, so it stays legible; the table lists every station in a state.

On the map

  • Observed temperature, °F, above-left of the station
  • Observed dew point, °F, below-left
  • Observed temperature and dew point are left off the map on a screen this narrow: the table below lists every station’s.
  • Observed wind: the staff points to where it blows from; a full barb is 10 kt, a half 5, a pennant 50; a ring is calm
  • Analysis cold front
  • Analysis warm front
  • Analysis stationary front
  • Analysis occluded front
  • Analysis dry line
  • Analysis trough
  • Analysis high and low pressure centres, with their pressure in millibars

WPC’s bulletin does not say which side of a front its symbols go, so this map draws no triangles or half-circles; each front is named on the map and in the list.

Observed 2,265 stations, each at its own time, most between and . Airport and other automated stations’ reports (METARs), as AviationWeather.gov decodes them. Left out: 462 reports flagged by the station for maintenance and one report that cannot be right; no other quality control is applied here.

Analysis WPC’s surface analysis valid , issued . A forecaster’s analysis of the fronts and pressure centres at that hour, every three hours.

  • Occluded front across Maine
  • Stationary front across North Carolina, Georgia, Alabama and Mississippi
  • Cold front across Maine, New York and New Jersey
  • Cold front across Maryland, Virginia and North Carolina
  • Stationary front across Delaware
  • Warm front across Maine
  • Cold front across Washington

Choose a state or a place for a table of its stations.

Surface observations checked · Data: NOAA/NWS Aviation Weather Center

WPC surface analysis checked · Data: NOAA/WPC

The briefing

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.