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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.

SPC soundings: feeds current

SPC soundings: Feed current; checked .

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

Soundings: what weather balloons measured

SPC’s skew-T diagram and hodograph of the sounding at EDW, 18Z. Its levels are in the table below.
Observed Sounding at EDW, for (34 h 59 min ago) older than the last two launches. SPC’s graphic; the values in its panels (CAPE, shear, the indices) are SPC’s computations from these levels. Data: NOAA/SPC.

A balloon launched about an hour before the time named, measuring as it rose and drifted with the wind: the atmosphere above one place, at one time. Model soundings, which are forecasts, are not shown here.

The levels this sounding was drawn from (39)
EDW: the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
939 mb702 m21.8-3.2060° 5 kt
927 mb832 m19.4-3.6—
925 mb854 m19.6-3.4060° 12 kt
890 mb1185 m18.0-5.0—
850 mb1575 m14.4-5.6040° 27 kt
825 mb1829 m12.2-5.4040° 32 kt
798 mb2103 m9.8-5.2—
766 mb2438 m7.8-6.3045° 39 kt
738 mb2743 m5.9-7.2045° 39 kt
711 mb3048 m4.0-8.2045° 41 kt
700 mb3179 m4.6-9.4045° 33 kt
659 mb3658 m1.8-11.3045° 35 kt
635 mb3962 m-0.2-12.6050° 28 kt
611 mb4267 m-2.2-13.9040° 25 kt
588 mb4572 m-4.2-15.2030° 24 kt
566 mb4877 m-6.2-16.5030° 24 kt
524 mb5486 m-9.3-22.2030° 24 kt
503 mb5791 m-11.7-24.7000° 19 kt
500 mb5840 m-12.1-25.1000° 19 kt
483 mb6096 m-14.2-26.9010° 19 kt
427 mb7010 m-21.5-33.1020° 14 kt
400 mb7500 m-25.5-36.5010° 18 kt
377 mb7925 m-29.3-39.7020° 21 kt
334 mb8781 m-37.3-42.3—
317 mb9144 m-39.0-55.8000° 22 kt
303 mb9449 m-40.7-60.9350° 19 kt
300 mb9520 m-41.1-62.1355° 27 kt
290 mb9754 m-41.1-64.7350° 27 kt
267 mb10311 m-38.5-69.5—
253 mb10668 m-39.3-70.3330° 47 kt
250 mb10760 m-39.5-70.5335° 47 kt
232 mb11278 m-42.5-70.8340° 44 kt
217 mb11721 m-45.1-71.1—
200 mb12270 m-43.9-75.9340° 63 kt
168 mb13411 m-52.2-78.9330° 44 kt
153 mb14021 m-57.0-80.6295° 34 kt
150 mb14140 m-57.9-80.9295° 37 kt
139 mb14616 m-61.5-82.5—
132 mb14935 m-61.9-82.9—
Every station with a sounding (78)

SPC observed soundings checked · Data: NOAA/SPC

Pennsylvania 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.