000 NOUS73 KBCQ 211200 ADMCRH Alert Administrative Message National Weather Service Detroit/Pontiac MI 800 AM EDT Thu Mar 21 2024 To: CRH APX IWX MKX GRB LOT NCRFC From: WFO DTX Subject: WFO DTX providing Service Backup for WFO GRR WFO DTX is providing full service backup for WFO GRR for a planned service backup test from 800 AM until Noon EDT. $$ Mann