{"url_path":"/weather/alerts/2.49.0.1.840.0.ab6de4e7d81560593f094b5c3c09e854a2592e41.002.1","section_key":"alert","section_title":"Severe Thunderstorm Warning issued July 20 at 6:00PM CDT until July 20 at 6:45PM 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.ab6de4e7d81560593f094b5c3c09e854a2592e41.002.1","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":130,"has_tables":false,"body_markdown":"# Severe Thunderstorm Warning: Severe Thunderstorm Warning issued July 20 at 6:00PM CDT until July 20 at 6:45PM CDT by NWS Des Moines IA\n\n**Severity:** Severe\n**Certainty:** Observed\n**Urgency:** Immediate\n**Areas:** Poweshiek, IA; Tama, IA\n**Issued by:** NWS Des Moines IA\n**Sent:** 2026-07-20T18:00:00-05:00\n**Effective:** 2026-07-20T18:00:00-05:00\n**Expires:** 2026-07-20T18:45:00-05:00\n\n## Description\nAt 600 PM CDT, a severe thunderstorm was located near Grinnell,\nmoving southeast at 35 mph.\n\nHAZARD...60 mph wind gusts and quarter size hail.\n\nSOURCE...Radar indicated.\n\nIMPACT...Hail damage to vehicles is expected. Expect wind damage to\nroofs, siding, and trees.\n\nLocations impacted include...\nGrinnell, Montezuma, Brooklyn, Holiday Lake, Malcom, and Guernsey.\n\nThis includes Interstate 80 between mile markers 184 and 204.\n\n## Instructions\nA Tornado Watch remains in effect until 1000 PM CDT for central Iowa.\n\nFor your protection move to an interior room on the lowest floor of a\nbuilding."}