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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 Yarmouth, Nova Scotia (YQI), 00Z. Its levels are in the table below.
Observed Sounding at Yarmouth, Nova Scotia (YQI), for (5 h 8 min ago). 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 (56)
Yarmouth, Nova Scotia (YQI): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
998 mb9 m14.013.7185° 13 kt
979 mb178 m13.413.4—
965 mb305 m14.114.1210° 45 kt
932 mb610 m15.615.6230° 57 kt
925 mb680 m16.016.0235° 57 kt
900 mb914 m15.715.7245° 52 kt
868 mb1219 m14.814.8240° 50 kt
850 mb1400 m14.214.2240° 47 kt
808 mb1829 m12.212.2245° 45 kt
779 mb2134 m10.710.7245° 50 kt
751 mb2438 m9.39.3245° 46 kt
724 mb2743 m7.37.3250° 49 kt
700 mb3019 m5.65.5260° 47 kt
666 mb3425 m2.0-1.0—
647 mb3658 m1.7-0.2260° 62 kt
618 mb4028 m-0.3-0.3—
600 mb4267 m-2.0-2.3255° 64 kt
574 mb4616 m-4.5-5.2—
560 mb4810 m-6.1-10.6—
546 mb5008 m-6.7-11.7—
532 mb5211 m-8.1-9.7—
521 mb5373 m-9.3-19.3—
502 mb5659 m-11.1-20.1—
500 mb5690 m-11.1-21.1250° 73 kt
486 mb5907 m-12.3-25.3—
474 mb6096 m-12.9-22.0245° 83 kt
464 mb6259 m-13.9-38.9—
446 mb6559 m-14.7-41.7—
416 mb7080 m-18.9-40.9—
400 mb7370 m-21.3-32.3240° 84 kt
387 mb7620 m-23.3-35.3240° 85 kt
366 mb8020 m-26.3-42.3—
356 mb8230 m-24.7-50.3250° 88 kt
341 mb8534 m-24.6-53.1250° 86 kt
319 mb9018 m-27.6-50.7255° 105 kt
305 mb9342 m-30.1-48.1—
300 mb9460 m-31.3-50.3255° 101 kt
257 mb10532 m-39.9-56.9—
250 mb10720 m-40.9-59.9255° 98 kt
236 mb11109 m-43.1-67.1—
200 mb12192 m-51.4-69.5260° 102 kt
200 mb12200 m-51.5-69.5260° 101 kt
150 mb14020 m-62.5-79.5265° 85 kt
129 mb14935 m-65.8-82.3270° 64 kt
113 mb15746 m-68.9-83.9255° 62 kt
100 mb16459 m-69.2-85.3275° 56 kt
100 mb16480 m-69.3-85.3255° 46 kt
86 mb17374 m-65.5-85.9270° 48 kt
74 mb18288 m-65.3-87.3255° 35 kt
64 mb19202 m-62.2-87.3250° 37 kt
52 mb20422 m-60.6-86.9200° 16 kt
41 mb21946 m-59.4-86.5265° 5 kt
31 mb23774 m-56.2-85.0230° 14 kt
20 mb26500 m-54.9-84.9270° 14 kt
10 mb30980 m-48.5-82.5275° 14 kt
5 mb35313 m-42.7-80.7—
Every station with a sounding (78)

SPC observed soundings checked · Data: NOAA/SPC

Delaware 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.