urn:oid:2.49.0.1.840.0.a7c731b26bc3a0e5a339b36289f9125565ebd3ea.001.1.IPAWSw-nws.webmaster@noaa.gov2026-09-18T17:47:00-06:00ActualAlert211803 v2.3.0PublicIPAWSv1.0en-USMetFlash Flood WarningAvoidImmediateSevereLikelySAMEFFWNationalWeatherServiceFFW2026-09-18T17:47:00-06:002026-09-18T17:47:00-06:002026-09-18T20:15:00-06:00NWS Boise IDFlash Flood Warning issued September 18 at 5:47PM MDT until September 18 at 8:15PM MDT by NWS Boise IDFFWBOI The National Weather Service in Boise has issued a * Flash Flood Warning for... The Wapiti Burn Area in... Northeastern Boise County in southwestern Idaho... * Until 815 PM MDT. * At 547 PM MDT, emergency management reported thunderstorms producing heavy rain over the Wapiti Burn Area. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the High Drainage Test. The debris flow can consist of rock, mud, vegetation and other loose materials. HAZARD...Life threatening flash flooding and debris flows in and around the Wapiti Fire Burn Scar. SOURCE...Emergency management reported debris on Idaho State Highway 21 between mileposts 103 and 105. IMPACT...Life threatening flash flooding and debris flows in and around the Wapiti Fire Burn Scar will impact Grandjean Road and Highway 21 from east of Lowman to Banner Summit. * Some locations that will experience flash flooding include... Grandjean. This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Wapiti Burn Area. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety.http://www.weather.govAWIPSidentifierFFWBOIWMOidentifierWGUS55 KBOI 182347flashFloodDetectionOBSERVEDflashFloodDamageThreatCONSIDERABLEBLOCKCHANNELEASBLOCKCHANNELNWEMEAS-ORGWXRVTEC/O.NEW.KBOI.FF.W.0013.260918T2347Z-260919T0215Z/eventEndingTime2026-09-18T20:15:00-06:00WEAHandlingImminent ThreatCMAMtextNWS: FLASH FLOOD WARNING this area til 8:15 PM MDT. Avoid flooded areas.CMAMlongtextNational Weather Service: A FLASH FLOOD WARNING is in effect for this area until 8:15 PM MDT. This is a dangerous and life-threatening situation. Do not attempt to travel unless you are fleeing an area subject to flooding or under an evacuation order.Boise, ID44.25,-115.32 44.28,-115.33 44.32,-115.29 44.29,-115.24 44.31,-115.22 44.28,-115.2 44.29,-115.17 44.2,-115.17 44.19,-115.13 44.15,-115.08 44.16,-115.06 44.12,-115.07 44.11,-115.04 44.09,-115.04 44.06,-115.14 44.1,-115.17 44.09,-115.24 44.14,-115.31 44.14,-115.36 44.16,-115.37 44.25,-115.32SAME016015UGCIDC015es-USMetFlash Flood WarningAvoidImmediateSevereLikelySAMEFFWNationalWeatherServiceFFW2026-09-18T17:47:00-06:002026-09-18T17:47:00-06:002026-09-18T20:15:00-06:00NWS Boise IDFlash Flood Warning issued September 18 at 5:47PM MDT until September 18 at 8:15PM MDT by NWS Boise IDFFWBOI The National Weather Service in Boise has issued a * Flash Flood Warning for... The Wapiti Burn Area in... Northeastern Boise County in southwestern Idaho... * Until 815 PM MDT. * At 547 PM MDT, emergency management reported thunderstorms producing heavy rain over the Wapiti Burn Area. Flash flooding is ongoing or expected to begin shortly. Excessive rainfall over the burn scar will result in debris flow moving through the High Drainage Test. The debris flow can consist of rock, mud, vegetation and other loose materials. HAZARD...Life threatening flash flooding and debris flows in and around the Wapiti Fire Burn Scar. SOURCE...Emergency management reported debris on Idaho State Highway 21 between mileposts 103 and 105. IMPACT...Life threatening flash flooding and debris flows in and around the Wapiti Fire Burn Scar will impact Grandjean Road and Highway 21 from east of Lowman to Banner Summit. * Some locations that will experience flash flooding include... Grandjean. This is a life threatening situation. Heavy rainfall will cause extensive and severe flash flooding of creeks...streams...and ditches in the Wapiti Burn Area. Severe debris flows can also be anticipated across roads. Roads and driveways may be washed away in places. If you encounter flood waters...climb to safety.http://www.weather.govAWIPSidentifierFFWBOIWMOidentifierWGUS55 KBOI 182347flashFloodDetectionOBSERVEDflashFloodDamageThreatCONSIDERABLEBLOCKCHANNELEASBLOCKCHANNELNWEMEAS-ORGWXRVTEC/O.NEW.KBOI.FF.W.0013.260918T2347Z-260919T0215Z/eventEndingTime2026-09-18T20:15:00-06:00WEAHandlingImminent ThreatCMAMtextSNM: AVISO DE INUNDACIONES REPENTINAS hasta 8:15 PM MDT. Evite areas inundadas.CMAMlongtextServicio Nacional de Meteorologia: AVISO DE INUNDACIONES REPENTINAS en efecto para esta area hasta las 8:15 PM MDT. Esta es una situacion peligrosa y amenaza la vida. No intente viajar a menos que sea para abandonar un area propensa a inundaciones o bajo una orden de desalojo.Boise, ID44.25,-115.32 44.28,-115.33 44.32,-115.29 44.29,-115.24 44.31,-115.22 44.28,-115.2 44.29,-115.17 44.2,-115.17 44.19,-115.13 44.15,-115.08 44.16,-115.06 44.12,-115.07 44.11,-115.04 44.09,-115.04 44.06,-115.14 44.1,-115.17 44.09,-115.24 44.14,-115.31 44.14,-115.36 44.16,-115.37 44.25,-115.32SAME016015UGCIDC0157n+FnMyG1djbSVS0Kuudd7fyMQczS8NJsxC5VB3aeag=FtVyN9lz5XxZH4phn/DAs100K6nD6CJ45EmTtc/uAVBSqTm6pkQLU+77S3k/nzCuHXPBmPIXpRRH nGgNxVWMBECEvPC1Qw6hdtbxSdXZuwNMsOpcbZmAuTogyZccWcYVoR715Ds6IlS3QiaQUdmse2L5 vnDYOxd2RpwQU+OxA0mFhAg1Wpq/jTEks5UcTffiWGqc/4hysoJaz9VadFakTbCn7OtXMuWoCCvQ qKjgXp/Glqqgbj6aFRjGFPOocUdAVv2a6Y3P05LM4QY+587Z93kRPzQxE/osQC8Nwfix4pumtcz8 FNppxXDVWiN7GohXGa2rw4Yn+XAKepHj4wfRDg==CN=IPAWSOPEN200032,OU=A01410D0000019A5E4549540014DF2C,OU=Devices IPAWS,OU=National Continuity Programs,O=FEMA IPAWS,C=USMIIHPzCCBSegAwIBAgIQQAGaXkVJb3yj70Q8FAqMbzANBgkqhkiG9w0BAQsFADBdMQswCQYDVQQG EwJVUzESMBAGA1UEChMJSWRlblRydXN0MSAwHgYDVQQLExdJZGVuVHJ1c3QgR2xvYmFsIENvbW1v bjEYMBYGA1UEAxMPSUdDIERldmljZSBDQSAyMB4XDTI1MTEwNzEyMjMxMFoXDTI4MTEwNjEyMjIx MFowgaUxCzAJBgNVBAYTAlVTMRMwEQYDVQQKEwpGRU1BIElQQVdTMSUwIwYDVQQLExxOYXRpb25h bCBDb250aW51aXR5IFByb2dyYW1zMRYwFAYDVQQLEw1EZXZpY2VzIElQQVdTMSgwJgYDVQQLEx9B MDE0MTBEMDAwMDAxOUE1RTQ1NDk1NDAwMTRERjJDMRgwFgYDVQQDEw9JUEFXU09QRU4yMDAwMzIw ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCOdhA5DPitMFp6DUbiQZi/anJ6L9qtPrRz gZksP2aOSve50875b4yi2eMv2caKpF+lxtbmzxdZjRuV55TnCkn7HaaLpi+7nFP4aDB9DDw/Gnop 65nNzLvZ7MXpCC3ikJk09iSgwVaw6RGte9X2WyUoPaEmygjv1lsVx+JGohgvPxTtiZhQJyxkxbM5 rR2MAC5VjsrZNu3idfvd1B0EEGM1cVU9jpVuyiWK53k+vPuSOH/UWMXezzrBEwjtw1SMVv2/dxKz 79gaITMmF6z5QqDFV0cstzmyEZWhyoavCpXW4W+vU+FLO0IgXINzY34IsnFQ/cqGEJ6MtC63uM8f 2L7dAgMBAAGjggKwMIICrDAOBgNVHQ8BAf8EBAMCBaAwfQYIKwYBBQUHAQEEcTBvMCkGCCsGAQUF BzABhh1odHRwOi8vaWdjLm9jc3AuaWRlbnRydXN0LmNvbTBCBggrBgEFBQcwAoY2aHR0cDovL3Zh bGlkYXRpb24uaWRlbnRydXN0LmNvbS9jZXJ0cy9pZ2NkZXZpY2VjYTIucDdjMB8GA1UdIwQYMBaA FD+LR65hHetlI5XEOi3tu0jVIykiMIIBQwYDVR0gBIIBOjCCATYwDQYLYIZIAYb5LwBkJQEwggEj BgtghkgBhvkvAGQmATCCARIwSwYIKwYBBQUHAgEWP2h0dHBzOi8vc2VjdXJlLmlkZW50cnVzdC5j b20vY2VydGlmaWNhdGVzL3BvbGljeS9JR0MvaW5kZXguaHRtbDCBwgYIKwYBBQUHAgIwgbUMgbJD ZXJ0aWZpY2F0ZSB1c2UgcmVzdHJpY3RlZCB0byBSZWx5aW5nIFBhcnR5KHMpIGluIGFjY29yZGFu Y2Ugd2l0aCBJR0MtQ1AgKHNlZSBodHRwczovL3NlY3VyZS5pZGVudHJ1c3QuY29tL2NlcnRpZmlj YXRlcy9wb2xpY3kvaWdjL2luZGV4Lmh0bWwpLiBJR0MtQ1BTIGluY29ycG9yYXRlZCBieSByZWZl cmVuY2UuMEUGA1UdHwQ+MDwwOqA4oDaGNGh0dHA6Ly92YWxpZGF0aW9uLmlkZW50cnVzdC5jb20v Y3JsL2lnY2RldmljZWNhMi5jcmwwGgYDVR0RBBMwEYIPSVBBV1NPUEVOMjAwMDMyMB0GA1UdDgQW BBQ8QhNU0KQ6GUEOz5peBrNTppU+fDAxBgNVHSUEKjAoBggrBgEFBQcDAgYIKwYBBQUHAwUGCCsG AQUFBwMGBggrBgEFBQcDBzANBgkqhkiG9w0BAQsFAAOCAgEAXiYe+0catdoGF4nXiIoyywVkVTaG BacaUIjTceAJv35LhC5gwAM+O3OudKQQbMeIzOcjJluFc4vFjmzL/DxLLKk6IVVZQ+MXO8O5UZ6e 0hSwQv3mO+9JkCYL7M/GIJwiq6XuEiLS7wESwnHq2tIppZNfpcZcMSlQC+4hoUPJuVNU7QVFtvXe 6FaB/zDMTU3pzOuCxn/SNIhBKHVesE8n5soIp5q8U/R/I9vYM52NISzZcYPGUp6Snyd9mVqmxAo+ t3pAgsojLOrSBPLQoPoip/KeKCMahrumQuaHi6t3ML6IlCIuOeNnHEaxnUIWGD7kAswOKsqGGjMN JwXw6TeqrddvCg8Nd0SH7mWI/vjOq/ykZs2q6lB3b/5ur7YjGOdT3310R0VhZ8pxuyUTrR6EFlFR PkWhg46BaEiP1GtzmEW7wT0YStf4wvwDR3HkjpzNoBO92+iwhVHPKyl7T4METnDyTAD+aDn/Xtp/ pZePlh9uOkCqS7NOm6B4Hjra/iL3BQG2gwcE6XOzbETH6/ibKwMroFDAgqe8AA6xdmcajHBf7/wA maMrAQmgbINPpZWjMo3wf2IccUTVHxLaZj+yQZcWMuX9R2H84eTo/CfqmG1RyxcqO0Nd1BS8i8Ii YnCXXUlXkpl0xFj1R1xiGv8bd4l5AGjorijY2Wnub1m4Y4k=