{"url_path":"/weather/alerts/2.49.0.1.840.0.f7057ad899de19e9e2c510bfad3303e77f4fdd7f.001.1","section_key":"alert","section_title":"Tornado Watch issued July 20 at 3:03PM CDT until July 20 at 10:00PM CDT by NWS Des Moines IA","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-07-20","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.f7057ad899de19e9e2c510bfad3303e77f4fdd7f.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Des Moines IA"},"word_count":380,"has_tables":false,"body_markdown":"# Tornado Watch: Tornado Watch issued July 20 at 3:03PM CDT until July 20 at 10:00PM CDT by NWS Des Moines IA\n\n**Severity:** Extreme\n**Certainty:** Possible\n**Urgency:** Future\n**Areas:** Adair, IA; Black Hawk, IA; Boone, IA; Bremer, IA; Butler, IA; Cerro Gordo, IA; Dallas, IA; Franklin, IA; Greene, IA; Grundy, IA; Guthrie, IA; Hamilton, IA; Hancock, IA; Hardin, IA; Humboldt, IA; Jasper, IA; Madison, IA; Mahaska, IA; Marion, IA; Marshall, IA; Polk, IA; Poweshiek, IA; Story, IA; Tama, IA; Warren, IA; Webster, IA; Winnebago, IA; Worth, IA; Wright, IA\n**Issued by:** NWS Des Moines IA\n**Sent:** 2026-07-20T15:03:00-05:00\n**Effective:** 2026-07-20T15:03:00-05:00\n**Expires:** 2026-07-20T22:00:00-05:00\n\n## Description\nTHE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 500 IN\nEFFECT UNTIL 10 PM CDT THIS EVENING FOR THE FOLLOWING AREAS\n\nIN IOWA THIS WATCH INCLUDES 29 COUNTIES\n\nIN CENTRAL IOWA\n\nBOONE                 DALLAS                GRUNDY\nHAMILTON              HARDIN                JASPER\nMARSHALL              POLK                  POWESHIEK\nSTORY                 TAMA                  WEBSTER\n\nIN NORTH CENTRAL IOWA\n\nBUTLER                CERRO GORDO           FRANKLIN\nHANCOCK               HUMBOLDT              WINNEBAGO\nWORTH                 WRIGHT\n\nIN NORTHEAST IOWA\n\nBLACK HAWK            BREMER\n\nIN SOUTH CENTRAL IOWA\n\nMADISON               MAHASKA               MARION\nWARREN\n\nIN SOUTHWEST IOWA\n\nADAIR\n\nIN WEST CENTRAL IOWA\n\nGREENE                GUTHRIE\n\nTHIS INCLUDES THE CITIES OF ACKLEY, ADAIR, ADEL, ALLISON, AMES,\nAPLINGTON, BAYARD, BELMOND, BOONE, BRITT, CARLISLE, CASEY,\nCEDAR FALLS, CLARION, CLARKSVILLE, CLEAR LAKE, CONRAD,\nDES MOINES, DIKE, DUMONT, DYSART, EAGLE GROVE, EARLHAM, ELDORA,\nFONTANELLE, FOREST CITY, FORT DODGE, GARNER, GLADBROOK, GREENE,\nGREENFIELD, GRINNELL, GRUNDY CENTER, GUTHRIE CENTER, HAMPTON,\nHUMBOLDT, INDIANOLA, IOWA FALLS, JEFFERSON, KANAWHA, KNOXVILLE,\nLAKE MILLS, MANLY, MARSHALLTOWN, MASON CITY, NEWTON, NORTHWOOD,\nNORWALK, OSKALOOSA, PANORA, PARKERSBURG, PELLA, PERRY, REINBECK,\nSHELL ROCK, STUART, TAMA, TOLEDO, TRAER, WATERLOO, WAUKEE,\nWAVERLY, WEBSTER CITY, WELLSBURG, AND WINTERSET.\n\n* PRIMARY THREATS INCLUDE...\n\nA FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLE.\nSCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS\nTO 75 MPH POSSIBLE.\nSCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5\nINCHES IN DIAMETER POSSIBLE.\n\nPROBABILITY TABLE:\nPROB OF 2 OR MORE TORNADOES                        :  70%\nPROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES       :  50%\nPROB OF 10 OR MORE SEVERE WIND EVENTS              :  60%\nPROB OF 1 OR MORE WIND EVENTS >= 75 MPH            :  50%\nPROB OF 10 OR MORE SEVERE HAIL EVENTS              :  40%\nPROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES          :  40%\nPROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS :  90%\nMEAN STORM MOTION /MPH/                            :  SE 35"}