Not sure if this helps at all…
Piston state: at 7:08 P.M. on 8/1 saying [[adminDistrict:Tennessee, adminDistrictCode:TN, areaId:TNC093, areaName:Knox County, areaTypeCode:C, categories:[[category:Met, categoryCode:2]], certainty:Unknown, certaintyCode:5, countryCode:US, countryName:UNITED STATES OF AMERICA, detailKey:8abbb7b5-4465-39ca-a010-3fbf795a6de4, disclaimer:null, effectiveTimeLocal:2019-08-01T17:21:00-04:00, effectiveTimeLocalTimeZone:EDT, eventDescription:Flood Advisory, eventTrackingNumber:0156, expireTimeLocal:2019-08-01T19:15:00-04:00, expireTimeLocalTimeZone:EDT, expireTimeUTC:1564701300, flood:[floodCrestTimeLocal:null, floodCrestTimeLocalTimeZone:null, floodEndTimeLocal:null, floodEndTimeLocalTimeZone:null, floodImmediateCause:Excessive Rainfall, floodImmediateCauseCode:ER, floodLocationId:00000, floodLocationName:N/A, floodRecordStatus:N/A, floodRecordStatusCode:OO, floodSeverity:None, floodSeverityCode:N, floodStartTimeLocal:null, floodStartTimeLocalTimeZone:null], headlineText:Flood Advisory from THU 5:21 PM EDT until THU 7:15 PM EDT, ianaTimeZone:America/New_York, identifier:d4e33ef8a098d40077e64242d1a6adde, issueTimeLocal:2019-08-01T17:21:00-04:00, issueTimeLocalTimeZone:EDT, latitude:00.00, longitude:00.00, messageType:New, messageTypeCode:1, officeAdminDistrict:Tennessee, officeAdminDistrictCode:TN, officeCode:KMRX, officeCountryCode:US, officeName:Knoxville/Tri-Cities, onsetTimeLocal:2019-08-01T17:21:00-04:00, onsetTimeLocalTimeZone:EDT, phenomena:FA, processTimeUTC:1564694510, productIdentifier:FLS, responseTypes:[[responseType:Avoid, responseTypeCode:5]], severity:Moderate, severityCode:3, significance:Y, source:National Weather Service, urgency:Unknown, urgencyCode:5]]