Severe Weather Alerts and Storm Warnings

This dataset provides detailed, real-time severe weather alerts and storm warnings from the National Weather Service, including event type, severity, timing, geographic coverage, and emergency activation status. It enables emergency responders, public safety officials, and data analysts to track, visualize, and respond to hazardous weather events efficiently across regions.

  • last updated 2 Nov 2025
  • by GoMask
The brief that made it

Emergency response activation and resource deployment

Sample rows

preview · 8 of 100 rows · all 22 columns
alert_idstringcertaintystringis_emergency_activationbooleanevent_codestringalert_typestringalert_statusstringseveritystringurgencystringeffective_datetimedatetimeexpires_datetimedatetimeissued_datetimedatetimeupdated_datetimedatetimearea_namestringarea_statestringarea_countrystringlatitudefloatlongitudefloatnws_officestringheadlinestringdescriptionstringinstructionstringpolygon_pointsstring
TX-0001-TORNADOobservedtrueTO.Wtornado warningissuedextremeimmediate2024-06-01T15:45:00Z2024-06-01T16:30:00Z2024-06-01T15:40:00Z2024-06-01T15:50:00ZHarris CountyTXUSA29.775-95.31NWS HoustonTornado Warning for Harris CountyA tornado has been observed in Harris County. Seek shelter immediately.Take shelter in a basement or interior room away from windows.29.770,-95.315,29.780,-95.305,29.775,-95.310
FL-0002-HUR-WARNlikelytrueHU.Whurricane warningissuedsevereexpected2024-06-05T08:00:00Z2024-06-06T08:00:00Z2024-06-05T07:45:00Z2024-06-05T09:00:00ZMiami-Dade CountyFLUSA25.7617-80.1918NWS MiamiHurricane Warning issued for Miami-DadeHurricane conditions expected within 24 hours in Miami-Dade County.Evacuate low-lying areas and secure property.25.762,-80.192,25.760,-80.190,25.761,-80.191
OK-0003-TORNADOobservedtrueTO.Wtornado warningupdatedextremeimmediate2024-06-02T18:10:00Z2024-06-02T18:55:00Z2024-06-02T18:05:00Z2024-06-02T18:15:00ZOklahoma CityOKUSA35.4634-97.5151NWS NormanTornado Warning for Oklahoma CityTornado spotted near Oklahoma City. Immediate action required.Take cover in a sturdy building away from windows.35.460,-97.510,35.470,-97.520,35.463,-97.515
CA-0004-FLASHFLOODlikelytrueFF.Wflash flood warningissuedsevereimmediate2024-06-10T14:30:00Z2024-06-10T17:30:00Z2024-06-10T14:15:00Z2024-06-10T15:00:00ZLos AngelesCAUSA34.0522-118.2437NWS Los AngelesFlash Flood Warning for Los AngelesHeavy rainfall leading to flash flooding in Los Angeles area.Avoid flooded roads and move to higher ground.34.052,-118.243,34.050,-118.241,34.053,-118.244
IL-0005-SEVERE-THUNlikelytrueSV.Wsevere thunderstorm warningissuedsevereexpected2024-06-11T16:00:00Z2024-06-11T17:00:00Z2024-06-11T15:45:00Z2024-06-11T16:10:00ZCook CountyILUSA41.8781-87.6298NWS ChicagoSevere Thunderstorm Warning for Cook CountyLarge hail and strong winds expected in Cook County.Remain indoors and stay away from windows.41.878,-87.630,41.880,-87.628,41.879,-87.629
NY-0006-WINTER-STORMlikelytrueWS.Wwinter storm warningissuedsevereexpected2024-12-10T03:00:00Z2024-12-10T09:00:00Z2024-12-10T02:45:00Z2024-12-10T03:15:00ZAlbany CountyNYUSA42.6526-73.7562NWS AlbanyWinter Storm Warning for Albany CountyHeavy snowfall and ice accumulation expected in Albany County.Limit travel and keep emergency supplies ready.42.650,-73.755,42.653,-73.758,42.652,-73.756
LA-0007-TROP-STORM-WARNlikelytrueTR.Wtropical storm warningissuedsevereexpected2024-07-14T13:00:00Z2024-07-15T13:00:00Z2024-07-14T12:45:00Z2024-07-14T13:15:00ZOrleans ParishLAUSA29.9511-90.0715NWS New OrleansTropical Storm Warning for Orleans ParishTropical storm conditions expected in New Orleans and surrounding areas.Secure outdoor items and prepare for possible evacuation.29.950,-90.070,29.952,-90.072,29.951,-90.071
GA-0008-FLASHFLOODlikelytrueFF.Wflash flood warningissuedmoderateexpected2024-06-09T07:30:00Z2024-06-09T10:30:00Z2024-06-09T07:00:00Z2024-06-09T08:00:00ZFulton CountyGAUSA33.749-84.388NWS AtlantaFlash Flood Warning for Fulton CountyFlash flooding possible due to heavy rainfall in Fulton County.Monitor local news and avoid flooded areas.33.749,-84.389,33.750,-84.387,33.748,-84.388

What the 100 rows show

from the 100-row sample

Likely certainty stands out: 50 of its 55 rows have is_emergency_activation = true, against 19 of 45 for the rest.

  • 69%is_emergency_activation = true
  • 4alert statuses
  • 4severities
  • 4urgencies
  • 8alert types
Is emergency activation rate by certaintyis_emergency_activation = true
0%50%100%85%observed11 of 1391%likely50 of 5533%possible8 of 240%unlikely0 of 8
event_code100 rows · top 10 of 14 values
  1. SV.W16
  2. FF.W11
  3. HUW11
  4. SVR9
  5. WSW9
  6. TO.W8
  7. FFW8
  8. WS.W7
  9. TOR7
  10. TSW6
22 columns by typefrom the column list below
  • string 15
  • float 2
  • datetime 4
  • boolean 1

Columns

22 columns in four groups
blueprint · 22 columns
columntypedescriptionexample
Text 15 columns
alert_idstringUnique identifier for each severe weather alert issued by NWSuniqueTX-0001-TORNADO
alert_typestringType of severe weather alert (e.g., tornado warning, severe thunderstorm warning, flash flood warning, winter storm warning, hurricane warning, tropical storm watch)8 valuestornado warning
alert_statusstringCurrent status of the alert (e.g., issued, updated, cancelled, expired)issued · updated · cancelled · expiredissued
severitystringSeverity level of the alert (e.g., extreme, severe, moderate, minor)extreme · severe · moderate · minorextreme
urgencystringUrgency of the alert (e.g., immediate, expected, future, past)immediate · expected · future · pastimmediate
certaintystringCertainty of the event occurrence (e.g., observed, likely, possible, unlikely)observed · likely · possible · unlikelyobserved
headlinestringShort headline summarizing the alertTornado Warning for Harri…
descriptionstringDetailed description of the alert and recommended actionsA tornado has been observ…
instructionstringSpecific instructions for emergency response or public safetyoptionalTake shelter in a basemen…
area_namestringName of the affected area (e.g., county, city, region)Harris County
area_statestringState or territory of the affected areaTX
area_countrystringCountry of the affected areaUSA
polygon_pointsstringComma-separated list of latitude,longitude pairs outlining the affected area polygonoptional29.770,-95.315,29.780,-95…
nws_officestringIdentifier or name of the NWS office that issued the alertNWS Houston
event_codestringOfficial NWS event code for the alert typeoptionalTO.W
Numbers 2 columns
latitudefloatLatitude coordinate of the center of the affected area-90 to 90 · optional29.775
longitudefloatLongitude coordinate of the center of the affected area-180 to 180 · optional-95.31
Dates and times 4 columns
effective_datetimedatetimeDate and time when the alert becomes effective2024-06-01T15:45:00Z
expires_datetimedatetimeDate and time when the alert expires2024-06-01T16:30:00Z
issued_datetimedatetimeDate and time when the alert was issued2024-06-01T15:40:00Z
updated_datetimedatetimeDate and time when the alert was last updatedoptional2024-06-01T15:50:00Z
True or false 1 column
is_emergency_activationbooleanIndicates if emergency response activation is requiredtrue

Use it for

  • is emergency a…69%69 of 100 rowsis emergency activati…85%obse…91%like…33%poss…0%unli…

    A government dashboard

    The is_emergency_activation rate, is_emergency_activation by certainty and a breakdown of event_code. Excel, Power BI or Tableau.

  • Why do 69 of 100 rows have is_emergency_activation = true?

    A root-cause class exercise

    Hand out the rows and one question. The answer is in the data, not in the brief.

  • A software demo

    Believable alerts with alert_type, alert_status and severity to fill a screen in front of a buyer.

Not quite right?

Make it yours.

Same 22 columns, your size and your rules. See 20 rows before you pay.

Preview 20 rows free

1,000 rows: $1.99 · 10,000: $12.99One-time. No subscription. All prices

This dataset100 rows22 columns
Yours1,000 rows22 columnsarea_state: UK only

blueprint · severe-weather-alerts-and-storm-warnings

Behind this dataset

Same schema. As many rows as you need.

These 100 rows came out of a blueprint — 22 columns with generation rules behind each one. Open it in Data Factory to retune a column, add your own, wire in foreign keys, and run it at the size you actually need.

Rules it was built with
  • Alert ID and issuance timestamp
  • Alert type: tornado warning, severe thunderstorm, flash flood, winter storm
  • Affected counties or zones (FIPS codes)
  • Valid time period (start and expiration)
  • Severity: extreme, severe, moderate, minor
  • Hazards: tornadoes, hail (size in inches), wind gusts (mph), flooding
  • Probability of occurrence and confidence level
  • Utility response: activate storm center, position crews, mutual assistance
Rows
Open the blueprint in Data Factory

1 credit per row. Preview 20 rows free. Buy rows for the full run.

Exports
CSV, JSON, JSONL, Parquet, SQL, Excel, TSV, XML
Licence
yours to use, including commercially
API slug
severe-weather-alerts-and-storm-warnings

More in Government

Browse all
Also in GovernmentProcurement Spend AnalyticsCivic Participation Event AttendanceUrban Noise Pollution Sensor DataAll 1,958 datasets

What should your data show?

Preview 20 rows free
No signup. No card.