Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Situational Awareness; Distraction; Workload
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR; Inflight Event / Encounter Weather / Turbulence
Flight Crew Returned To Clearance; Flight Crew Became Reoriented
Human Factors; Weather
During preflight brief we noted (via radar app on iPhone and release) possible weather enroute during the departure; but given the early morning departure time it was most likely just rain (returns were yellow on radar app). We turned the radar on shortly after takeoff; it displayed a cell in red ahead of us; about this this time we received a handoff. Immediately after checking in; I asked the PM (pilot monitoring) to request right deviations for weather; then turned on the autopilot. I selected vertical speed mode and dialed in 1500 ft/min climb rate to accelerate to 250 knots; we were at approximately 220 knots through 6000 feet. Cleared for deviations to the right I switched to heading mode and selected a heading to avoid the weather; as I did this the rain was moderate to heavy so I selected continuous ignition. Looking down at the MFD (Multi-function Flight Displays) to check our course and the radar the PM called out check speed; we were accelerating through 260 knots; I immediately dialed in 3000 ft/min to slow to 250 knots. Once below 260 knots I selected speed mode; and dialed in 250 knots.My distraction with the weather ahead vs aircraft control; [and] a busier than anticipated cockpit environment. Using vertical speed mode vs speed mode; especially below 10;000 feet in the climb. We also did not anticipate the weather being as close to the field as it turned out to be; we last looked at the radar app at least 30 minutes prior to takeoff. The information from the radar app is not an official source of weather; considered as such only advisory.Turn the radar on before takeoff. Request the autopilot sooner; and use speed mode below 10;000 feet to accelerate to a desired speed not vertical speed mode.
CRJ-700 Captain reported exceeding 250 knots below 10;000 feet on departure due to distraction by weather.