That's what I thought too -- but he clipped the GIF version instead of the flash version of ADDS, which indeed uses whole integer numbers for SLP (the flash version uses the tenths, like in METARs). Still, the lowest I can find from the station's METAR record is:
KCYD 291035Z AUTO 1/4SM -RA FG OVC004 27/26 A2809 RMK A02 P0002 T02710260
Which is about 951mb. The issue is that the station didn't report an altimeter for 90m prior to that and it was on the way up -- so we don't really know.