Calamity
MediumSevere WeatherCalamity Score: 43

Severe Weather near Marshfield

MarathonUnited StatesNOAA

This alert expired on 27 May 2026 at 22:30 UTC. It is kept here as a record.

It is the 4th strongest of the 79 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Severe Thunderstorm Warning issued May 27 at 5:21PM CDT until May 27 at 5:30PM CDT by NWS Green Bay WI

An estimated 117,284 people live within 50 km of this point.

Nearby, since 15 March 2026

How we know

Confirmed by 22 independent sources, including NOAA.

Our own score for this event is 43 out of 100, at 90 % 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)43 / 100
Our confidence90%
Coordinates44.6980, -89.8270
Nearest CityMarshfield (27 km)
Population Exposed117.3K within 50 km
Impact Tiersignificant
Timestamp2026-05-27T22:21:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6918911d2b92097d7196e13695191726

Score Breakdown

35
intensity
70
population
0
cascading
80
historical

Technical Details

EventSevere Thunderstorm Warning
UrgencyImmediate
CertaintyObserved
AreaDescPortage, WI; Marathon, WI
HeadlineSevere Thunderstorm Warning issued May 27 at 5:21PM CDT until May 27 at 5:30PM CDT by NWS Green Bay WI
Expires2026-05-27T17:30:00-05:00
SenderNameNWS Green Bay WI
HasExactCoordstrue
MergedCount2
MergedIds["noaa_urn:oid:2.49.0.1.840.0.6918911d2b92097d7196e1369519172658ccc44b.001.1","noaa_urn:oid:2.49.0.1.840.0.66da7a3dcf87a3cce012c753497decf266db5e2c.001.1"]
Iem TypeSummaryH
Iem Magnitude1.75
Iem UnitInch
Iem City1 ESE Rib Mountain Stat
Iem CountyMarathon
Iem StateWI
Iem WfoGRB
MergedSources[{"id":"iem_D_44.930_-89.630_1779916560000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916560000,"latitude":44.93,"longitude":-89.63},{"id":"iem_H_44.850_-89.600_1779918660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779918660000,"latitude":44.85,"longitude":-89.6},{"id":"iem_H_44.950_-89.620_1779916740000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916740000,"latitude":44.95,"longitude":-89.62},{"id":"iem_H_44.930_-89.680_1779916620000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916620000,"latitude":44.93,"longitude":-89.68},{"id":"iem_H_44.920_-89.620_1779916800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916800000,"latitude":44.92,"longitude":-89.62},{"id":"iem_H_44.900_-89.710_1779916920000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916920000,"latitude":44.9,"longitude":-89.71},{"id":"iem_H_44.980_-89.670_1779916200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916200000,"latitude":44.98,"longitude":-89.67},{"id":"iem_H_44.890_-89.600_1779917100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779917100000,"latitude":44.89,"longitude":-89.6},{"id":"iem_H_44.850_-89.620_1779917640000","source":"iem","severity":"low","severityValue":25,"timestamp":1779917640000,"latitude":44.85,"longitude":-89.62},{"id":"iem_H_44.960_-89.610_1779916800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916800000,"latitude":44.96,"longitude":-89.61},{"id":"iem_H_44.840_-89.610_1779918360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779918360000,"latitude":44.84,"longitude":-89.61},{"id":"iem_H_44.990_-89.630_1779916560000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916560000,"latitude":44.99,"longitude":-89.63},{"id":"iem_H_44.950_-89.720_1779916500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916500000,"latitude":44.95,"longitude":-89.72},{"id":"iem_H_44.920_-89.660_1779917820000","source":"iem","severity":"low","severityValue":25,"timestamp":1779917820000,"latitude":44.92,"longitude":-89.66},{"id":"iem_H_44.850_-89.610_1779918480000","source":"iem","severity":"low","severityValue":25,"timestamp":1779918480000,"latitude":44.85,"longitude":-89.61},{"id":"iem_H_44.900_-89.700_1779917340000","source":"iem","severity":"low","severityValue":25,"timestamp":1779917340000,"latitude":44.9,"longitude":-89.7},{"id":"iem_H_44.960_-89.640_1779916320000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916320000,"latitude":44.96,"longitude":-89.64},{"id":"iem_H_44.960_-89.690_1779916740000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916740000,"latitude":44.96,"longitude":-89.69},{"id":"iem_H_44.950_-89.620_1779916560000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916560000,"latitude":44.95,"longitude":-89.62},{"id":"iem_G_44.780_-89.670_1779919140000","source":"iem","severity":"low","severityValue":25,"timestamp":1779919140000,"latitude":44.78,"longitude":-89.67},{"id":"iem_H_44.910_-89.650_1779916680000","source":"iem","severity":"low","severityValue":25,"timestamp":1779916680000,"latitude":44.91,"longitude":-89.65}]

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 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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Calamity.live data shows a weather event with CalamityScore 43/100, near Marshfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.