Calamity
MediumSevere WeatherCalamity Score: 16

Severe Weather in United States

LakeUnited StatesNOAA

Right now

The most recent data we hold from NOAA arrived 3 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 31 May 2026 at 18:00 UTC. It is kept here as a record.

It is the 5th strongest of the 12 detections recorded within 20 km of this point since 7 April 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Flood Watch issued May 30 at 11:58AM MDT until June 5 at 1:00AM MDT by NWS Missoula MT

Nearby, since 7 April 2026

How we know

One source: NOAA. Not yet confirmed by a second, independent source.

Our own score for this event is 16 out of 100, at 61 % 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

TypeSevere Weather
SeverityMedium
Calamity Score (ours)16 / 100
Our confidence61%
Coordinates47.6588, -114.0070
Nearest CityKalispell (64 km)
Impact Tierminor
Timestamp2026-06-01T16:25:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Flood Watch_noaa_urn:oid:2.49.0.1.840.0.d4eb5756cbb80224c2a13f3b617b7f9c

Score Breakdown

35
intensity
0
population
0
cascading
18
historical

Technical Details

EventFlood Watch
UrgencyFuture
CertaintyPossible
AreaDescMissoula, MT; Flathead, MT; Flathead, MT; Lake, MT; Missoula, MT
HeadlineFlood Watch issued May 30 at 11:58AM MDT until June 5 at 1:00AM MDT by NWS Missoula MT
Expires2026-05-31T12:00:00-06:00
SenderNameNWS Missoula MT
HasExactCoordstrue
MergedCount3
MergedIds["noaa_urn:oid:2.49.0.1.840.0.d4eb5756cbb80224c2a13f3b617b7f9cf53f9423.001.1","noaa_urn:oid:2.49.0.1.840.0.d704ddb986866a85c7d710ff82b234ffbb374d6e.001.1","noaa_urn:oid:2.49.0.1.840.0.d749093fae7bfd330a0285975bcf817a5fc3b9fc.001.1"]

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.

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