Data health
NationalSite status

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 frontWarm frontCold frontOccluded frontCold frontWarm frontStationary frontH1025H1026H1026H1026H1029H1029H1031H1031H1029H1026H1026H1021H1022L995L999L10254340383240283431433236344743554352334136533148434040423535315035363436354434413540385039544352484636454341364139343036343632342830283734484541324848413736324845633446415234393436364341502732127039614046416134635045375945645445358659603854395421632857576434523455365939754560567759646452377355593963418039633755556245593872538058513552325936454163465338593961365343644443376341574563365544553358485958552561435252653957394639633965406145644468505844644664456430503862425743493966516853553751376445523768436145616077595639643359328369633356334535503454435841614658215726624259405943493051367048573546455243593941395018614443385739727059376355523655366848594163435739553959365452473951344630616165366326654143325842544352275532453447406944563561375939645961427048583761314926543957395847523779646634514472544121585045365436816673727957544552527952595981598268826373737239595763596654793982708472
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 2,153 stations, each at its own time, most between and . Airport and other automated stations’ reports (METARs), as AviationWeather.gov decodes them. Left out: 590 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.

  • Warm front across Montana
  • Cold front across Montana, Idaho and Oregon
  • Cold front across Iowa and Missouri
  • Warm front across Pennsylvania
  • Stationary front across Oregon

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.