Right now
The most recent data we hold from NOAA arrived 36 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 10 May 2026 at 09:15 UTC. It is kept here as a record.
It is the 5th strongest of the 9 detections recorded within 20 km of this point since 28 April 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 10 at 3:27AM CDT until May 10 at 4:15AM CDT by NWS Fort Worth TX
An estimated 26,515 people live within 50 km of this point.
Nearby, since 28 April 2026
- June 12, 2026 · score 39 · 14.1 km
- May 10, 2026 · score 39 · 15.0 km
- May 10, 2026 · score 43 · 20.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 34 / 100 |
| Our confidence | 85% |
| Coordinates | 33.4344, -96.0527 |
| Nearest City | Greenville (33 km) |
| Population Exposed | 26.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-10T08:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.556c77a9fec732adef714e0dd8e12e66 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cooke, TX; Grayson, TX; Bowie, TX; Franklin, TX; Red River, TX; Titus, TX |
| Headline | Severe Thunderstorm Warning issued May 10 at 3:27AM CDT until May 10 at 4:15AM CDT by NWS Fort Worth TX |
| Expires | 2026-05-10T04:15:00-05:00 |
| SenderName | NWS Fort Worth TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.556c77a9fec732adef714e0dd8e12e66facd33df.001.1","noaa_urn:oid:2.49.0.1.840.0.6d5d0c763093deb90603ba1db3afafe7b4f9d130.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 2 |
| Iem Unit | Inch |
| Iem City | 2 ENE Southmayd |
| Iem County | Grayson |
| Iem State | TX |
| Iem Wfo | FWD |
| Iem Remark | Spotter reports 2 inch hail near Sherman. |
| MergedSources | [{"id":"iem_H_33.630_-96.680_1778400600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778400600000,"latitude":33.63,"longitude":-96.68}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.