Here are two sample UR Storm decks from me. One has Past in Flames as its Noble, and the other's Noble is the soon-to-be-released Epic Experiment:
Noble Past in Flames
Noble
1 Past in Flames
Lands
4 Gemstone Mine
1 Sandstone Needle
7 Island
2 Mountain
Spells
4 Ponder
4 Preordain
4 Brainstorm
4 Serum Visions
4 Manamorphose
4 Gitaxian Probe
4 Rite of Flame
4 Desperate Ritual
4 Seething Song
2 Lotus Petal
4 Grapeshot
3 Lightning Bolt
Sideboard
3 Empty the Warrens
4 Echoing Truth
4 Dispel
4 Early Frost
The Epic Noble Storm
Noble
1 Epic Experiment
Lands
4 Gemstone Mine
1 Sandstone Needle
7 Island
2 Mountain
Spells
4 Ponder
4 Preordain
4 Brainstorm
4 Serum Visions
3 Peer Through Depths
4 Manamorphose
4 Gitaxian Probe
4 Rite of Flame
4 Desperate Ritual
4 Seething Song
2 Lotus Petal
4 Grapeshot
Sideboard
4 Echoing Truth
4 Dispel
4 Early Frost
1 Lightning Bolt
2 Flaring Pain
The Epic Experiment build is highly dependent on resolving multiple Grapeshots but is immune to common graveyard hate like Relic of Progenitus, while the Past in Flames build can afford to combo off on only one Grapeshot but is vulnerable to graveyard hate. The Past in Flames build can play around counterspells like Spell Pierce more easily.
The uncommon in both builds is the wonderfully mana-fixing Gemstone Mine. IMO, it is highly underrated in Noble Storm decks of all kinds and allows one to run more blue mana sources without compromising on ritual colour sources. It has tested better than Mystical Tutor for me.
Does anyone else have any UR Storm builds they would like to share? Different Nobles (Diminishing Returns seems like a viable unbanned Noble)? Different flex slots? Different uncommons? Anyone?