Right now
The most recent data we hold from NOAA arrived 75 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 3 July 2026 at 02:15 UTC. It is kept here as a record.
It is the 30th strongest of the 184 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 2 July 2026. 53 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 2 at 8:02PM CDT until July 2 at 9:00PM CDT by NWS Aberdeen SD
Nearby, since 15 March 2026
- August 11, 2026 · score 22 · 0.0 km
- June 9, 2026 · score 34 · 0.0 km
- June 5, 2026 · score 22 · 0.0 km
How we know
16 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 43.9000, -99.4000 |
| Nearest City | Mitchell (112 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-03T01:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.226305124bdb7868044f2ec92ff5bd73 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-03T01:02:00.000Z.
First archived: 2026-07-03T01:17:12.456Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Hughes, SD; Jones, SD; Stanley, SD; Sully, SD; Aurora, SD; Beadle, SD; Brookings, SD; Brule, SD; Davison, SD; Douglas, SD; Hanson, SD; Hutchinson, SD; Jerauld, SD; Kingsbury, SD; Lake, SD; Lincoln, SD; McCook, SD; Miner, SD; Minnehaha, SD; Moody, SD; Sanborn, SD; Turner, SD; Butte, SD; Haakon, SD; Harding, SD; Lawrence, SD; Meade, SD; Pennington, SD; Perkins, SD; Ziebach, SD; Crook, WY |
| Headline | Severe Thunderstorm Watch issued July 2 at 8:02PM CDT until July 2 at 9:00PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-02T21:15:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.226305124bdb7868044f2ec92ff5bd73da5a1934.002.1","noaa_urn:oid:2.49.0.1.840.0.cbf4c85f7812a1ffe4319918452fe95efea3ad29.002.1","noaa_urn:oid:2.49.0.1.840.0.bbc3627ea456b2886ed0466355c0bf678b192f09.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 7 SSW Gann Valley |
| Iem County | Buffalo |
| Iem State | SD |
| Iem Wfo | ABR |
| MergedSources | [{"id":"iem_H_43.920_-99.120_1783019400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783019400000,"latitude":43.92,"longitude":-99.12},{"id":"iem_H_43.940_-99.040_1783020600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783020600000,"latitude":43.94,"longitude":-99.04},{"id":"iem_T_43.950_-98.990_1783022160000","source":"iem","severity":"low","severityValue":25,"timestamp":1783022160000,"latitude":43.95,"longitude":-98.99},{"id":"iem_G_43.740_-98.960_1783026000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783026000000,"latitude":43.74,"longitude":-98.96},{"id":"iem_G_44.200_-99.110_1783024860000","source":"iem","severity":"low","severityValue":25,"timestamp":1783024860000,"latitude":44.2,"longitude":-99.11},{"id":"iem_T_44.030_-98.950_1783023000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783023000000,"latitude":44.03,"longitude":-98.95},{"id":"iem_T_44.080_-98.840_1783024200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783024200000,"latitude":44.08,"longitude":-98.84},{"id":"iem_N_43.310_-99.690_1783026600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783026600000,"latitude":43.31,"longitude":-99.69},{"id":"iem_G_43.850_-99.560_1783023840000","source":"iem","severity":"low","severityValue":25,"timestamp":1783023840000,"latitude":43.85,"longitude":-99.56},{"id":"iem_G_43.850_-99.560_1783024440000","source":"iem","severity":"low","severityValue":25,"timestamp":1783024440000,"latitude":43.85,"longitude":-99.56},{"id":"iem_G_44.080_-98.990_1783026300000","source":"iem","severity":"low","severityValue":25,"timestamp":1783026300000,"latitude":44.08,"longitude":-98.99},{"id":"iem_G_44.080_-99.330_1783024800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783024800000,"latitude":44.08,"longitude":-99.33},{"id":"iem_G_44.080_-98.990_1783025700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783025700000,"latitude":44.08,"longitude":-98.99},{"id":"iem_H_44.080_-99.110_1783024860000","source":"iem","severity":"low","severityValue":25,"timestamp":1783024860000,"latitude":44.08,"longitude":-99.11},{"id":"iem_H_43.950_-99.050_1783019700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783019700000,"latitude":43.95,"longitude":-99.05}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Review the area, threshold and delivery channel in your account.
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