Narrative:

On a flight we had an EICAS indication of hydraulic 1 low qty while in cruise. We quickly determined the situation to be odd as the hydraulic were checked a couple of minutes ago as a routine and were shown well within limits; half way in the green range. However once we noted the message we went back to check the fluids and saw them on the top of the amber range. At this point we have pulled out the QRH and looked at the procedure. A couple of minutes went by and the number 1 hydraulic qty kept dropping to half range on the amber.at this point we needed to come up with plan; we knew we were losing hydraulic qty. At this time the weather at clt was showing exactly at minimums leaving us with the risk of a possible go around. We knew we kept losing hydraulic fluid each minute that went by on the number 1 system. If we would have continued to clt we would be at risk of a possible go around due to the weather being at minimums; and if we kept losing pressure the system would not allow us to bring up the gear back up in the event of a go around in case we lost the number 1 hydraulic's.leaving us with limited options we decided as a crew that the safest action would be to divert to ZZZ and fix the issue there. Getting the plane on the ground safely was the priority. The weather at ZZZ had skies approximately at 3000 AGL; winds calm and good visibility with long runways available. Once we decided to divert the controller advised us that ATC had [given priority handling] to ' make it official'. Once we landed we were able to continue to the gate without any issues.EICAS message indicated low qty. Hydraulic leak on the number one side. We kept monitoring the system and came up with a plan in the event of several scenarios; depending on the indication of the systems. Not taking any chances; once landed on ZZZ maintenance did a couple of checks of the hydraulic and within 5 minutes they had lost all the hydraulic fluid on the number 1 side. This occurred at the gate while they were doing their checks. In this case that could have given us the trouble of possibly executing a go around and not being able to bring the gear up.

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Original NASA ASRS Text

Title: ERJ145 flight crew reported a loss of hydraulic fluid resulted in a diversion.

Narrative: On a flight we had an EICAS indication of HYD 1 Low QTY while in cruise. We quickly determined the situation to be odd as the HYD were checked a couple of minutes ago as a routine and were shown well within limits; half way in the green range. However once we noted the message we went back to check the fluids and saw them on the top of the amber range. At this point We have pulled out the QRH and looked at the procedure. A couple of minutes went by and the number 1 HYD QTY kept dropping to half range on the amber.At this point we needed to come up with plan; we knew we were losing HYD QTY. AT this time the weather at CLT was showing exactly at minimums leaving us with the risk of a possible go around. We knew we kept losing HYD FLUID each minute that went by on the number 1 system. If we would have continued to CLT we would be at risk of a possible go around due to the weather being at minimums; and if we kept losing pressure the system would not allow us to bring up the gear back up in the event of a go around in case we lost the number 1 HYD's.Leaving us with limited options we decided as a crew that the safest action would be to divert to ZZZ and fix the issue there. Getting the plane on the ground safely was the priority. The weather at ZZZ had skies approximately at 3000 AGL; winds calm and good visibility with long runways available. Once we decided to divert the controller advised us that ATC had [given priority handling] to ' make it official'. Once we landed we were able to continue to the gate without any issues.EICAS message indicated low QTY. Hydraulic leak on the number one side. We kept monitoring the system and came up with a plan in the event of several scenarios; depending on the indication of the systems. Not taking any chances; once landed on ZZZ maintenance did a couple of checks of the HYD and within 5 minutes they had lost all the HYD fluid on the number 1 side. This occurred at the gate while they were doing their checks. In this case that could have given us the trouble of possibly executing a go around and not being able to bring the gear up.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.