Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Confusion; Time Pressure; Situational Awareness; Distraction
Inflight Event / Encounter Fuel Issue; Inflight Event / Encounter Weather / Turbulence
Flight Crew Diverted
Airport; Weather
Unforeseen storms at destination airport caused a diversion that lead to a low fuel emergency.We were operating a flight to JAX; on taxi out numerous aircraft were receiving reroutes; as many of the southerly routes were closed. We received a reroute to the north of Dulles; after entering the new flight plan we showed 3.0 over the destination and sent dispatch a message with our reroute. There was no alternate required and the TAF showed VFR conditions with a possibility of typical FL isolated thunderstorms (TS) on our arrival so both the captain and I were comfortable with this amount of fuel. The departure and first phases of flight were unremarkable. We made some minor deviations along the coast of the Carolina's and showed 2.7 over our destination. We confirmed with dispatch and they said our route looked good going into JAX.We knew there was isolated TS activity in the northern FL region so we remained as high as long as ATC would allow. We were also checking our possible diversion airport north of JAX which all had extreme storms. When we checked on with JAX Approach; they informed us that there was a cell directly over the field and numerous microburst alerts some in excess of 80 knots. The Tower said that the cell was moving extremely slowly with little to no ground track. We sent dispatch a message and looked at our closest alternates of SAV and MCO. SAV was +TSRA and MCO was clear VFR. We also looked into SGJ as well as SFB. Both airports showed thunderstorms in the area; and we did not have charts for these airports. Our FMS showed 1.2 fuel remaining at MCO. Taking into account the weather at all our other options we diverted to MCO and declared [minimum] fuel. We touched down in MCO with 1.2 FOB and proceeded to the gate without further incident.
Air carrier flight crew arrived at their destination to find a slow moving thunderstorm over the field. They consulted with Dispatch; diverted and landed with emergency fuel level on board.