The Collaborative International Dictionary of English v.0.48:

Squall \Squall\ (skw[add]l), n. [Cf. Sw. sqval an impetuous
   running of water, sqvalregn a violent shower of rain, sqvala
   to stream, to gush.]
   A sudden and violent gust of wind often attended with rain or
   snow.
   [1913 Webster]

         The gray skirts of a lifting squall.     --Tennyson.
   [1913 Webster]

   Black squall, a squall attended with dark, heavy clouds.

   Thick squall, a black squall accompanied by rain, hail,
      sleet, or snow. --Totten.

   White squall, a squall which comes unexpectedly, without
      being marked in its approach by the clouds. --Totten.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Squall \Squall\, v. i. [imp. & p. p. Squalled (skw[add]ld); p.
   pr. & vb. n. Squalling.] [Icel. skvala. Cf. Squeal.]
   To cry out; to scream or cry violently, as a woman
   frightened, or a child in anger or distress; as, the infant
   squalled.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Squall \Squall\, n.
   A loud scream; a harsh cry.
   [1913 Webster]

         There oft are heard the notes of infant woe,
         The short, thick sob, loud scream, and shriller squall.
                                                  --Pope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

squall
    n 1: sudden violent winds; often accompanied by precipitation
    v 1: make high-pitched, whiney noises [syn: squall, waul,
         wawl]
    2: utter a sudden loud cry; "she cried with pain when the doctor
       inserted the needle"; "I yelled to her from the window but
       she couldn't hear me" [syn: shout, shout out, cry,
       call, yell, scream, holler, hollo, squall]
    3: blow in a squall; "When it squalls, a prudent sailor reefs
       his sails"

Moby Thesaurus II by Grady Ward, 1.0:

172 Moby Thesaurus words for "squall":
   altercation, bark, battle cry, bawl, bay, beef, bell, bellow,
   bickering, black squall, blare, blast, blat, blate, bleat,
   blizzard, blow, blow a hurricane, blow great guns, blow over,
   blow up, blubber, bluster, boom, brawl, bray, breathe, breeze,
   breeze up, brew, buzz, cackle, call, caterwaul, caw, chant, cheer,
   chirp, come up, coo, croak, crow, cry, cry out, cyclone,
   dirty weather, dispute, drawl, equinoctial, exclaim, falling-out,
   feud, fight, flute, foul weather, freshen, gale, gasp, gather,
   give tongue, give voice, groan, growl, grunt, hail, half a gale,
   halloo, hassle, heavy blow, hiss, holler, hollo, hoot, howl, huff,
   hurrah, hurricane, ill wind, keen, lilt, line squall, line storm,
   low, make an outcry, meow, mew, mewl, miaow, moan, moo, mumble,
   murmur, mutter, neigh, nicker, pant, pipe, pipe up, puff, pule,
   rage, rainstorm, rallying cry, roar, rough weather, rumble, screak,
   scream, screech, set in, shout, shriek, sibilate, sigh, sing, snap,
   snarl, snort, snowstorm, sob, squall line, squawk, squeak, squeal,
   storm, storm wind, stormy weather, stormy winds, strong wind,
   tempest, tempestuous rage, tempestuous wind, thick squall, thunder,
   thundersquall, thunderstorm, tirade, tornado, troat,
   tropical cyclone, trumpet, twang, typhoon, ugly wind, ululate,
   violent blow, waft, wail, war cry, war whoop, warble, whicker,
   whiff, whiffle, whine, whinny, whisper, white squall, whole gale,
   whoop, williwaw, wind-shift line, windstorm, yammer, yap, yawl,
   yawp, yell, yelp, yip, yo-ho, yowl