Web links are given first. The twitter accounts with the @ sign are second. Twitter is a fast way to get a lot of information, almost too much. TweetDeck can scroll this in real time, often faster than you can read it.
State emergency management authorities:
CT:
CT DEMHS
http://www.ct.gov/demhs/site/default.asp
@CTDEMHS
DE:
Delaware EMA
http://www.dema.delaware.gov
@DelawareEMA
MA:
Mass EMA
http://www.mass.gov/mema
@MassEMA
MA DOT
http://transportation.blog.state.ma.us/blog/
@MassDOT
City of Boston OEM
http://www.cityofboston.gov/readyboston
@Ready_Boston
http://on.fb.me/readyboston
ME:
Maine EMA
http://www.maine.gov/mema
@MaineEMA
MD:
Maryland Emergency Mgmt. Agency
http://www.mema.state.md.us
@mema_feeds
NC:
North Carolina Division of Emergency Management
http://www.ncem.org/
NC DOT
http://ncdot.gov
@NCDOT
NJ:
New Jersey OEM
http://www.ready.nj.gov/
http://www.state.nj.us/njoem/
@NJOEM2010
@NJSP
@NJEMSTF
NY:
New York State Emerg Mgmt Ofc
http://www.semo.state.ny.us
@NYSEMO
NYC
http://www.NYC.gov
@NYCMayorsOffice
PA:
Pennsylvania EMA
http://www.pema.state.pa.us/portal/server.pt/community/pema_home/4463
https://www.webeoc.state.pa.us/eoc7/
Philadelphia OEM
http://www.phila.gov/ready
@PhilaOEM
Pittsburgh OEMHS
http://www.city.pittsburgh.pa.us/ps/html/emerg_mgt.html
@PittsburghOEMHS
RI:
Rhode Island EMA
http://www.riema.ri.gov
@RhodeIslandEMA
VA:
Virginia Department of Emergency Management
http://www.vaemergency.gov
@VDEM
http://www.vaemergency.com/programs/gis/
@VDEM_GIS
http://vko.va.ngb.army.mil/VirginiaGuard/
@VaGuardPAO
VT:
Vermont Emerg Mgmt
http://www.vemvt.com
@vemvt
WV:
West Virginia Department of Homeland Security & Emergency Mgmt.
http://www.wvdhsem.gov
@WVDHSEM
Federal/Mil:
FEMA
Federal Emergency Management Agency
http://www.fema.gov
@FEMA
@CraigatFEMA
@femaregion1
@femaregion2
@femaregion3
NHC
National Hurricane Center
http://www.nhc.noaa.gov/
@HurricaneAlerts
@NHC_Atlantic
US Coast Guard
http://www.uscg.mil
@uscoastguard
@USCG
http://www.coastguardd5publicaffairs.com
@uscgmidatlantic
http://www.uscgnewengland.com
@USCGNortheast
Private:
American Red Cross
http://www.redcross.org/
@RedCross
Salvation Army
http://www.salvationarmyusa.org/
@SalvationArmyUS
Weather Channel
http://www.weather.com
@TWCBreaking
@JimCantore