Right now
The most recent data we hold from NOAA arrived 8 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 20 June 2026 at 01:47 UTC. It is kept here as a record.
It is the 2nd strongest of the 149 detections recorded within 20 km of this point since 1 April 2026. Another comparable one was recorded here earlier the same day. 24 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 19 at 6:37PM PDT until June 19 at 6:45PM PDT by NWS Reno NV
Urban PEI: 488,978 within a heuristic 50 km radius; not unique people.
Nearby, since 1 April 2026
- June 19, 2026 · score 43 · 0.0 km
- August 12, 2026 · score 43 · 4.8 km
- August 12, 2026 · score 43 · 14.2 km
How we know
7 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 39.4833, -119.6717 |
| Nearest City | Sparks (8 km) |
| Urban exposure index (PEI) | 489.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T01:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9bc735506f4ba80f8ddc0353d4e4c7a4e7f7ff16.001.1 |
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: 2026-06-20T01:37:00.000Z.
First archived: 2026-06-20T01:40:40.656Z. 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 | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Storey, NV; Washoe, NV |
| Headline | Flash Flood Warning issued June 19 at 6:37PM PDT until June 19 at 6:45PM PDT by NWS Reno NV |
| Expires | 2026-06-19T18:47:00-07:00 |
| SenderName | NWS Reno NV |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 ESE Sparks |
| Iem County | Washoe |
| Iem State | NV |
| Iem Wfo | REV |
| Iem Remark | 1 inch diameter hail reported. |
| MergedSources | [{"id":"iem_F_39.650_-119.700_1781913420000","source":"iem","severity":"low","severityValue":25,"timestamp":1781913420000,"latitude":39.65,"longitude":-119.7},{"id":"iem_x_39.490_-119.710_1781910600000","source":"iem","severity":"low","severityValue":25,"timestamp":1781910600000,"latitude":39.49,"longitude":-119.71},{"id":"iem_F_39.660_-119.700_1781912700000","source":"iem","severity":"low","severityValue":25,"timestamp":1781912700000,"latitude":39.66,"longitude":-119.7},{"id":"iem_F_39.520_-119.700_1781910600000","source":"iem","severity":"low","severityValue":25,"timestamp":1781910600000,"latitude":39.52,"longitude":-119.7},{"id":"iem_F_39.670_-119.710_1781913600000","source":"iem","severity":"low","severityValue":25,"timestamp":1781913600000,"latitude":39.67,"longitude":-119.71},{"id":"iem_H_39.530_-119.700_1781910300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781910300000,"latitude":39.53,"longitude":-119.7}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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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