{"url_path":"/weather/alerts/2.49.0.1.840.0.1c28728ae8a458dd93b1430e124b0459c0a1e75a.001.1","section_key":"alert","section_title":"Hydrologic Outlook issued May 13 at 9:34AM MDT by NWS Billings MT","topic":"weather","document":{"doc_type":"alert","doc_date":"2026-05-13","source_url":"https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1c28728ae8a458dd93b1430e124b0459c0a1e75a.001.1","accession_number":null,"cik":null,"ticker":null,"issuer_name":null,"edgar_url":null,"primary_entity_key":null,"primary_entity_name":"NWS Billings MT"},"word_count":272,"has_tables":false,"body_markdown":"# Hydrologic Outlook: Hydrologic Outlook issued May 13 at 9:34AM MDT by NWS Billings MT\n\n**Severity:** Unknown\n**Certainty:** Possible\n**Urgency:** Future\n**Areas:** Big Horn, MT; Carbon, MT; Golden Valley, MT; Park, MT; Stillwater, MT; Sweet Grass, MT; Wheatland, MT; Yellowstone, MT; Sheridan, WY\n**Issued by:** NWS Billings MT\n**Sent:** 2026-05-13T09:34:00-06:00\n**Effective:** 2026-05-13T09:34:00-06:00\n**Expires:** 2026-05-14T15:00:00-06:00\n\n## Description\nESFBYZ\n\nRecent very warm temperatures has enhanced snowmelt in the mountains\nthis week, resulting in significantly higher flows on area waterways.\nFlooding is not expected at this time due to marginal remaining\nsnowpack in the middle elevations between 6000 and 8000 feet. Rivers\nthat have seen increased flows include the Yellowstone, Shields,\nBoulder, Stillwater, and Clarks Fork. Some smaller streams flowing\nout of the mountains have also experienced rises.\n\nLooking ahead, cooler temperatures are in store for the end of the\nweek. In fact, a seasonably cold weather system may bring freezing\ntemperatures at high elevations and potential snowfall this weekend\ninto early next week. The colder weather will slow or briefly halt\nthe high elevation snow melt.\n\nThose with interests along foothills waterways should be prepared for\nhigher water levels, and move property and livestock away from\nrivers, streams, and low lying areas.\n\nRunoff may fill culverts, ditches, and storm drains causing water to\nflow over foothills roadways potentially causing damage. Do not drive\nover flooded roadways, Turn Around Don't Drown.\n\nRecreationists in the mountains and foothills should be prepared for\nchanging conditions and use extra caution when near waterways. Flows\nwill be faster, and the water is very cold.\n\nStay tuned to the forecast. Please report any flooding to local law\nenforcement and have them relay the report to the National Weather\nService."}