Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert is in force until 21 September 2026, 13:00 UTC.
No stronger detection stands among the 19 recorded within 20 km of this point since 19 August 2026 — 16 others scored the same. The last comparable one was on 20 September 2026. 17 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued September 20 at 8:48PM EDT by NWS Tampa Bay Ruskin FL
Urban PEI: 128,694 within a heuristic 50 km radius; not unique people.
Nearby, since 19 August 2026
- September 20, 2026 · score 37 · 0.0 km
- September 19, 2026 · score 37 · 0.0 km
- September 18, 2026 · score 37 · 0.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 37 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Legacy data-support index | 0.87/1 |
| Coordinates | 29.0280, -82.4340 |
| Nearest City | Marion Oaks (25 km) |
| Urban exposure index (PEI) | 128.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T00:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.affd7dc767c3d04b8641134a1f1d725a4256bfe2.002.1 |
Physical priority index · v5. 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: 2026-09-21T00:48:00.000Z.
First archived: 2026-09-21T00:52:43.292Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-21T01:46:18.438Z · data_change
Index 37 → 37; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Citrus, FL; Levy, FL; Marion, FL |
| Headline | Flood Warning issued September 20 at 8:48PM EDT by NWS Tampa Bay Ruskin FL |
| Expires | 2026-09-21T09:00:00-04:00 |
| SenderName | NWS Tampa Bay Ruskin FL |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 49 |
| Iem Unit | MPH |
| Iem City | 1 SSE Cedar Key |
| Iem County | GMZ850 |
| Iem State | FL |
| Iem Wfo | TBW |
| Iem Remark | Buoy station CKYF1 Cedar Key, FL reported 49 mph wind gust. |
| MergedSources | [{"id":"iem_G_28.900_-82.650_1789934400000","source":"iem","severity":"low","severityValue":25,"timestamp":1789934400000,"latitude":28.9,"longitude":-82.65},{"id":"iem_M_29.140_-83.030_1789939800000","source":"iem","severity":"low","severityValue":25,"timestamp":1789939800000,"latitude":29.14,"longitude":-83.03}] |
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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