{"url_path":"/weather/alerts/2.49.0.1.840.0.1b740ef0df441d47852e81588812970bca26df02.001.1","section_key":"alert","section_title":"Flash Flood Warning issued September 18 at 4:13PM MDT until September 18 at 7:15PM MDT by NWS Grand Junction CO","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-09-18","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1b740ef0df441d47852e81588812970bca26df02.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Grand Junction CO"},"word_count":265,"has_tables":false,"body_markdown":"# Flash Flood Warning: Flash Flood Warning issued September 18 at 4:13PM MDT until September 18 at 7:15PM MDT by NWS Grand Junction CO\n\n**Severity:** Severe\n**Certainty:** Likely\n**Urgency:** Immediate\n**Areas:** Mesa, CO\n**Issued by:** NWS Grand Junction CO\n**Sent:** 2026-09-18T16:13:00-06:00\n**Effective:** 2026-09-18T16:13:00-06:00\n**Expires:** 2026-09-18T19:15:00-06:00\n\n## Description\nFFWGJT\n\nThe National Weather Service in Grand Junction has issued a\n\n* Flash Flood Warning for...\nNorthwestern Mesa County in west central Colorado...\n\n* Until 715 PM MDT.\n\n* At 413 PM MDT, Doppler radar indicated thunderstorms producing\nheavy rain across the warned area. Between 0.4 and 0.8 inches of\nrain have fallen. The expected rainfall rate is 1.5 to 3 inches in\n1 hour. Flash flooding is ongoing or expected to begin shortly.\n\nHAZARD...Life threatening flash flooding. Thunderstorms producing\nflash flooding.\n\nSOURCE...Radar indicated.\n\nIMPACT...Life threatening flash flooding of creeks and streams,\nurban areas, highways, streets and underpasses.\n\n* Some locations that will experience flash flooding include...\nLoma and Mack. This includes portions of I-70 between mile markers\n8 and 15.\n\n## Instructions\nTurn around, don't drown when encountering flooded roads. Most flood\ndeaths occur in vehicles.\n\nRemain alert for flooding even in locations not receiving rain.\nArroyos, streams, and rivers can become raging currents in a matter\nof minutes, even from distant rainfall.\n\nFlooding is occurring or is imminent. It is important to know where\nyou are relative to streams, rivers, or creeks which can become life\nthreatening in heavy rains. Campers and hikers should avoid streams\nor creeks.\n\nPlease report observed flooding to local emergency services or law\nenforcement and request they pass this information to the National\nWeather Service when you can do so safely."}