Data health
STORM MODEWeather tracking workspace

Storm Mode · Severe weather event

Test123

No alerts

Checked

Weather Operations Mode
More
Choose another storm or areaClassic view
Agency warning geometry · no observed imagery displayed

Map

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.

North ↑
ⓘ About this map

Outlines: NOAA/NWS · Radar cells: IEM/NEXRAD. Outlines are warned areas, not storm paths.

Interactive imagery loads separately. Missing radar does not remove warnings or imply clear weather.

Change time or forecast product

Recorded weather · gaps are marked. Coverage begins with recording activation.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

No observed replay frame displayed.

Open the complete replay reader (works without scripting or WebGL)

Analysis and guidance

Choose product

Current weather

ReportsAnalysis and guidanceRadar

Observations

Coastal observationsRadar-derived cellsStations and river gauges

Severe storms

SPC Day 1 outlookWatchesMesoscale discussions

Rain and flooding

Flash-flood risk, Day 1River gauges in floodRain expected and rain that fell

Analysis

Area, source times and interpretation

Current cached context, independently dated. Regional reference: TX; a reference within a wider monitoring area does not replace the complete warning geography. This section remains separate from the historical replay cursor and official cyclone forecast. Use Forecast to pin a retained model package.

Soundings: what weather balloons measured

SPC’s skew-T diagram and hodograph of the sounding at Sterling, VA (IAD), 12Z. Its levels are in the table below.
Observed Sounding at Sterling, VA (IAD), for (1 h 23 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 (61)
Sterling, VA (IAD): the surface first, then up through the atmosphere. Temperature and dew point in °C, as measured.
PressureHeightTemperatureDew pointWind
1020 mb93 m8.63.8calm
1007 mb198 m11.02.0—
1000 mb256 m10.61.6000° 11 kt
941 mb759 m7.01.0—
925 mb900 m6.4-0.6355° 10 kt
903 mb1097 m5.6-3.4—
890 mb1219 m7.0-9.8000° 13 kt
857 mb1524 m6.8-13.8345° 20 kt
850 mb1593 m6.6-14.4335° 21 kt
803 mb2057 m4.8-18.2—
782 mb2273 m4.2-10.8—
766 mb2438 m3.0-6.6340° 40 kt
749 mb2623 m3.0-16.0—
738 mb2743 m3.0-18.2340° 33 kt
726 mb2875 m3.2-18.8—
700 mb3170 m2.0-18.0330° 27 kt
659 mb3658 m-0.1-37.9320° 29 kt
647 mb3802 m-0.7-20.7—
634 mb3962 m-2.0-11.5315° 30 kt
620 mb4141 m-2.7-12.7—
592 mb4506 m-5.7-10.7—
565 mb4871 m-8.1-21.1—
553 mb5037 m-8.7-26.7—
542 mb5193 m-9.7-28.7—
528 mb5394 m-11.7-18.7—
518 mb5541 m-12.3-27.3—
507 mb5704 m-13.3-32.3—
500 mb5810 m-14.5-18.7295° 36 kt
490 mb5963 m-14.7-26.7—
476 mb6182 m-15.3-27.3—
466 mb6342 m-16.3-31.3—
405 mb7380 m-25.3-30.3—
400 mb7470 m-25.7-32.7300° 49 kt
389 mb7671 m-26.9-32.9—
360 mb8226 m-29.1-33.1—
345 mb8534 m-31.4-36.4285° 66 kt
331 mb8820 m-33.5-39.5—
316 mb9144 m-36.2-41.3290° 68 kt
300 mb9500 m-39.3-42.0290° 71 kt
290 mb9731 m-41.3-43.3—
269 mb10236 m-45.5-47.4—
257 mb10538 m-47.9-52.4—
250 mb10720 m-48.9-57.9290° 77 kt
238 mb11042 m-51.3-66.3—
221 mb11520 m-55.7-62.7—
211 mb11814 m-58.5-65.5—
200 mb12150 m-61.1-69.1285° 83 kt
189 mb12497 m-64.0-72.6290° 84 kt
171 mb13106 m-66.7-73.9300° 81 kt
160 mb13502 m-69.1-75.1280° 86 kt
150 mb13890 m-66.3-81.3285° 77 kt
129 mb14808 m-65.7-83.7—
100 mb16360 m-65.5-86.5290° 61 kt
89 mb17069 m-65.0-86.5265° 44 kt
73 mb18288 m-63.9-88.6285° 36 kt
63 mb19194 m-64.3-89.3—
51 mb20422 m-64.4-89.4310° 16 kt
41 mb21839 m-63.7-90.7—
20 mb26270 m-55.9-86.9255° 45 kt
10 mb30740 m-46.1-83.1260° 114 kt
8 mb32053 m-48.3-84.3—
Every station with a sounding (79)

SPC observed soundings checked · Data: NOAA/SPC

Radar-derived cells (3) · current

Collector checked ; feed generated . Zero cells does not establish coverage or clear weather. Observations from different radars are not merged.

  1. POE / W0 · scan 2026-10-31T13:15:31Z · current
  2. SHV / A8 · scan 2026-10-31T13:14:26Z · current
  3. SHV / Q6 · scan 2026-10-31T13:14:26Z · current
Station and river observations (168)

Surface source current; observed water-level source current. Each reading keeps its own time. Map markers show at most 500 stations and 500 gauges; the complete source directory is paginated.

Circle: surface station; square: water-level gauge. Filled: current reading and source; hollow: stale, unconfirmed or missing observation. Marker color is not a hazard category. Enable “Stations and gauges” in Layers to inspect them on the map.

Showing 100 of 168 listed sources. All surface stations and retained trends · All supported gauges and forecasts

About this monitored event

This event, as this site’s operators set it up

Kind
Severe weather
Window
Open: no start or end was set
Updated

Spotlight

8 products · choose one
Monitoring area details
Area
Texas (NWS states: TX)
Hazards
Tornado, severe thunderstorm, flash flood, river flood, areal flood, coastal flood and other 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 site’s operators, in its admin console. Nothing about a reader is stored. Watch another area

An area the operators chose, not a storm’s footprint: everything here is in force in this area, never “from this event”.

In force in this area

No warning, watch or advisory for these hazards is in force in this area.

NWS’s alerts checked : a successful check, so this is none in force, not “can’t tell”.

My places

Places saved on this device appear here with scripting enabled.

Find or save a place
0AlertsTest123
No alerts in Test123 ·