How to pronounce Florissant?

Florissant, MO - northern suburb of St. Louis

FLOR-iss-uhnt

'Flor' as in floor, 'iss' as in hiss, 'uhnt' as in the last syllable of deodorant

Northern suburb of St. Louis, MO

French

Flourishing, Blooming

'Flor' as in floor, 'iss' as in hiss, 'uhnt' as in the last syllable of deodorant

NOT pronounced (we know your radio spot was recorded outside of St. Louis when we hear...)
"floor" ESS ent
FLUER ess ent (too French-like!)
"Floor" ess "ant"

Name of the city in Missouri

French, but St. Louis-style mangling

Prior post on correct pronunciation is correct.
St Louisans commonly mispronounce names of French and German origin. To add to the challenge, the mispronunciation isn't consistent. Names of Native American origin are spelled phonetically but likely only resemble the original language (Meramec River.)
Other commonly mispronounced St. Louis place names: Gravois, Des Peres (city and river -- heck, it's not even a river!), Creve Coeur, Dunegant, St Francois (person and river), St. Louis.
Other Missouri names: Cortoix Creek, Nevada (city), New Madrid (city, fault line)