Calamity
HighSevere WeatherCalamity Score: 48

Severe Weather near Clive

PolkUnited StatesNOAA

Right now

The most recent data we hold from NOAA arrived 19 minutes ago, and this point is in it.

19 other detections within 20 km in the last 24 hours, the nearest 2 km from here.

This alert is in force until 9 September 2026, 19:15 UTC.

No stronger detection stands among the 130 recorded within 20 km of this point since 16 March 2026 — 23 others scored the same. Another comparable one was recorded here earlier the same day.

What the source measured

NOAA reported: Flood Warning issued September 9 at 2:08AM CDT until September 9 at 7:00PM CDT by NWS Des Moines IA

An estimated 531,891 people live within 50 km of this point.

Nearby, since 16 March 2026

How we know

Confirmed by 2 independent sources, including NOAA.

Our own score for this event is 48 out of 100, at 86 % confidence.

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

Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.

Event Data

TypeSevere Weather
SeverityHigh
Calamity Score (ours)48 / 100
Our confidence86%
Coordinates41.5970, -93.7407
Nearest CityClive (2 km)
Population Exposed531.9K within 50 km
Impact Tiersevere
Timestamp2026-09-09T07:08:00.000Z
Sourcehttps://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c4b96362fa1fbc31019199a7411eb29cfe51311b.001.1

Score Breakdown

50
intensity
85
population
0
cascading
25
historical

Technical Details

EventFlood Warning
UrgencyExpected
CertaintyLikely
AreaDescDallas, IA; Polk, IA; Polk, IA
HeadlineFlood Warning issued September 9 at 2:08AM CDT until September 9 at 7:00PM CDT by NWS Des Moines IA
Expires2026-09-09T14:15:00-05:00
SenderNameNWS Des Moines IA
HasExactCoordstrue
MergedCount2
MergedIds["noaa_urn:oid:2.49.0.1.840.0.c4b96362fa1fbc31019199a7411eb29cfe51311b.001.1","noaa_urn:oid:2.49.0.1.840.0.6009ad014ac5f82d58b67adb242441c67f3e26cf.001.1"]
Spc ReportTypehail
Spc Speed150
Spc LocationMitchellville
Spc CountyPolk
Spc StateIA
Spc CommentsReport from mPING: Ping Pong Ball (1.50 in.). (DMX)
MergedSources[{"id":"spc_wind_41.83_-93.80_1","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.83,"longitude":-93.8},{"id":"spc_wind_41.76_-93.62_3","source":"spc","severity":"high","severityValue":70,"timestamp":1788938476413,"latitude":41.76,"longitude":-93.62},{"id":"spc_wind_41.77_-93.58_4","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.77,"longitude":-93.58},{"id":"spc_wind_41.76_-93.57_6","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.76,"longitude":-93.57},{"id":"spc_wind_41.61_-93.75_7","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.61,"longitude":-93.75},{"id":"spc_wind_41.59_-93.59_8","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.59,"longitude":-93.59},{"id":"spc_wind_41.53_-93.66_9","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.53,"longitude":-93.66},{"id":"spc_wind_41.59_-93.64_10","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.59,"longitude":-93.64},{"id":"spc_wind_41.61_-93.63_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.61,"longitude":-93.63},{"id":"spc_wind_41.59_-93.64_12","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.59,"longitude":-93.64},{"id":"spc_wind_41.69_-93.37_13","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.69,"longitude":-93.37},{"id":"spc_wind_41.58_-93.10_14","source":"spc","severity":"medium","severityValue":45,"timestamp":1788938476413,"latitude":41.58,"longitude":-93.1},{"id":"spc_hail_41.73_-93.60_23","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.73,"longitude":-93.6},{"id":"spc_hail_41.74_-93.55_24","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.74,"longitude":-93.55},{"id":"spc_hail_41.70_-93.48_25","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.7,"longitude":-93.48},{"id":"spc_hail_41.74_-93.55_26","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.74,"longitude":-93.55},{"id":"spc_hail_41.70_-93.54_27","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.7,"longitude":-93.54},{"id":"spc_hail_41.70_-93.48_28","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.7,"longitude":-93.48},{"id":"spc_hail_41.66_-93.36_29","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.66,"longitude":-93.36},{"id":"spc_hail_41.66_-93.36_30","source":"spc","severity":"high","severityValue":65,"timestamp":1788938476413,"latitude":41.66,"longitude":-93.36}]

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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