Right now
The most recent data we hold from NOAA arrived 11 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 13 August 2026 at 00:45 UTC. It is kept here as a record.
It is the 17th strongest of the 66 detections recorded within 20 km of this point since 6 May 2026. The last comparable one was on 12 August 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 6:06PM MDT until August 12 at 6:45PM MDT by NWS Denver CO
Nearby, since 6 May 2026
- May 30, 2026 · score 46 · 2.5 km
- July 23, 2026 · score 22 · 11.2 km
- June 24, 2026 · score 46 · 14.0 km
How we know
6 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.
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.
Event data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 40.7486, -103.0357 |
| Nearest city | Evans (146 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact tier | minor |
| Timestamp | 2026-08-13T00:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2fdbdad6e6f57385b96bacfa13e14314aa37df8e.001.1 |
| Licence | US public domain · NOAA National Weather Service |
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: 2026-08-13T00:06:00.000Z.
First archived: 2026-08-13T00:18:23.728Z. 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 Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Logan, CO |
| Headline | Severe Thunderstorm Warning issued August 12 at 6:06PM MDT until August 12 at 6:45PM MDT by NWS Denver CO |
| Expires | 2026-08-12T18:45:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 15 S Kimball |
| Iem County | Kimball |
| Iem State | NE |
| Iem Wfo | CYS |
| Iem Remark | Live Stream feed of quarter sized hail falling just north of the CO/NE border on Highway 71. |
| MergedSources | [{"id":"iem_G_40.920_-103.700_1786575240000","source":"iem","severity":"low","severityValue":25,"timestamp":1786575240000,"latitude":40.92,"longitude":-103.7},{"id":"iem_W_41.060_-103.780_1786574880000","source":"iem","severity":"low","severityValue":25,"timestamp":1786574880000,"latitude":41.06,"longitude":-103.78},{"id":"iem_D_40.960_-103.780_1786574940000","source":"iem","severity":"low","severityValue":25,"timestamp":1786574940000,"latitude":40.96,"longitude":-103.78},{"id":"iem_H_41.060_-103.750_1786575120000","source":"iem","severity":"low","severityValue":25,"timestamp":1786575120000,"latitude":41.06,"longitude":-103.75},{"id":"iem_H_41.010_-103.690_1786575960000","source":"iem","severity":"low","severityValue":25,"timestamp":1786575960000,"latitude":41.01,"longitude":-103.69}] |
Safety information
What to do in a thunderstorm
Three things first, then what to do before, during and after. From the US National Weather Service.
For this reportSevere Weather · United States
When thunder roars, go indoors
If you can hear thunder, lightning can reach you. Go into a closed building or a hard-topped car with the windows shut.
NWSNowhere is safe outdoors
Not under a tree, not in a tent or a shelter open at the sides. Get away from water and high ground.
NWSWait 30 minutes
Go back out only 30 minutes after the last thunder.
NWS
Before, during, after. Here it is “after”.
Before · When storms are forecast
Check the forecast
Before going out, especially to mountains, the sea or open fields.
Know where to shelter
A closed building or a car you can reach quickly.
National Weather Service
During · While it storms
Keep off water and plumbing
No baths or showers, no washing up.
Away from windows
And from doors and corded phones.
Flash floods
Never drive or walk into a flooded road.
National Weather Service
After · When it has passed
Thirty minutes
After the last thunder, not the last rain.
Fallen lines
Keep away from power lines and anything touching them.
National Weather Service
Questions people ask
Is a car safe in a thunderstorm?
A hard-topped car with the windows closed is: the metal shell carries the current around you. Convertibles, bicycles and motorbikes are not. Source: US National Weather Service.
How long should I wait to go back out?
Thirty minutes after the last thunder you hear. Source: US National Weather Service.
Is it safe under a tree?
No. It is one of the most dangerous places in a storm. Source: US National Weather Service.
Review the area, threshold and delivery channel in your account.