Calamity
mediumSevere weatherCalamity Score: 34

Severe weather in United States

MorrisonUnited StatesNOAA

This alert expired on 16 March 2026 at 03:15 UTC. It is kept here as a record.

It is the 35th strongest of the 170 detections recorded within 20 km of this point since 15 March 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: Heavy Freezing Spray Warning issued March 15 at 10:07AM CDT until March 16 at 12:00PM CDT by NWS Duluth MN

An estimated 16,788 people live within 50 km of this point.

Nearby, since 15 March 2026

How we know

Confirmed by 48 independent sources, including NOAA.

Our own score for this event is 34 out of 100, at 87 % confidence.

The score is ours, computed from intensity, exposed population and local history — not the source’s.

Event Data

TypeSevere weather
Severitymedium
Calamity Score (ours)34 / 100
Our confidence87%
Coordinates46.0000, -94.3000
Nearest CitySartell (43 km)
Population Exposed16.8K within 50 km
Impact Tiersignificant
Timestamp2026-03-15T15:07:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Heavy-Freezing-Spray-Warning_noaa_urn-oid-2_49_0_1_840_0_5d927a3f051d4a8bc17413b60a7738b1

Score Breakdown

35
intensity
40
population
0
cascading
80
historical

Technical Details

EventHeavy Freezing Spray Warning
UrgencyExpected
CertaintyLikely
AreaDescSilver Bay Harbor to Two Harbors MN; Two Harbors to Duluth MN; Duluth MN to Port Wing WI; Port Wing to Sand Island WI; Grand Portage to Grand Marais MN; Taconite Harbor to Silver Bay Harbor MN; Sand Island to Bayfield WI; Oak Point to Saxon Harbor WI; Outer Apostle Islands Beyond 5 NM from Mainland and 2 more areas
HeadlineHeavy Freezing Spray Warning issued March 15 at 10:07AM CDT until March 16 at 12:00PM CDT by NWS Duluth MN
Expires2026-03-15T22:15:00-05:00
SenderNameNWS Duluth MN
HasExactCoordsfalse
MergedCount5
MergedIds["noaa_urn:oid:2.49.0.1.840.0.5d927a3f051d4a8bc17413b60a7738b167db41e5.004.2","noaa_urn:oid:2.49.0.1.840.0.5d927a3f051d4a8bc17413b60a7738b167db41e5.001.2","noaa_urn:oid:2.49.0.1.840.0.5d927a3f051d4a8bc17413b60a7738b167db41e5.003.2","noaa_urn:oid:2.49.0.1.840.0.5d927a3f051d4a8bc17413b60a7738b167db41e5.002.2","noaa_urn:oid:2.49.0.1.840.0.3e16dfa0bb4d85badfa6028e440201397413ebd2.001.2"]
Iem TypeSummaryS
Iem Magnitude4
Iem UnitInch
Iem City1 SW Little Falls
Iem CountyMorrison
Iem StateMN
Iem WfoMPX
Iem RemarkCocorahs station MN-MR-4 Little Falls 1.2 SW.
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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 10 February 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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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 188 scientific monitoring sources.