PHENOMENON OF DIAMOND DUST.

PHENOMENON OF DIAMOND DUST. >> IT IS THE KIND OF WEATHER

PHENOMENON OF DIAMOND DUST. >> IT IS THE KIND OF WEATHER

PHENOMENON OF DIAMOND DUST. >> IT IS THE KIND OF WEATHER MANY OF US WILL TELL OUR

>> IT IS THE KIND OF WEATHER MANY OF US WILL TELL OUR

>> IT IS THE KIND OF WEATHER MANY OF US WILL TELL OUR GRANDCHILDREN ABOUT YEARS FROM

MANY OF US WILL TELL OUR GRANDCHILDREN ABOUT YEARS FROM

MANY OF US WILL TELL OUR GRANDCHILDREN ABOUT YEARS FROM NOW.

GRANDCHILDREN ABOUT YEARS FROM NOW.

GRANDCHILDREN ABOUT YEARS FROM NOW. BUT THERE ARE SOME FASCINATING

NOW. BUT THERE ARE SOME FASCINATING

NOW. BUT THERE ARE SOME FASCINATING PHENOMENA BEING PRODUCED BY THIS

BUT THERE ARE SOME FASCINATING PHENOMENA BEING PRODUCED BY THIS

BUT THERE ARE SOME FASCINATING PHENOMENA BEING PRODUCED BY THIS HISTORIC COLD.

PHENOMENA BEING PRODUCED BY THIS HISTORIC COLD.

PHENOMENA BEING PRODUCED BY THIS HISTORIC COLD. WE'VE ALL SEEN THE STEAM COMING

HISTORIC COLD. WE'VE ALL SEEN THE STEAM COMING

HISTORIC COLD. WE'VE ALL SEEN THE STEAM COMING OFF THE LAKE.

WE'VE ALL SEEN THE STEAM COMING OFF THE LAKE.

WE'VE ALL SEEN THE STEAM COMING OFF THE LAKE. BUT WHEN IT IS THIS COLD, THE

OFF THE LAKE. BUT WHEN IT IS THIS COLD, THE

OFF THE LAKE. BUT WHEN IT IS THIS COLD, THE WATER VAPOR INDEX FREEZES INTO

BUT WHEN IT IS THIS COLD, THE WATER VAPOR INDEX FREEZES INTO

BUT WHEN IT IS THIS COLD, THE WATER VAPOR INDEX FREEZES INTO ICE CRYSTALS THAT GIVE OFF A

WATER VAPOR INDEX FREEZES INTO ICE CRYSTALS THAT GIVE OFF A

WATER VAPOR INDEX FREEZES INTO ICE CRYSTALS THAT GIVE OFF A SHINY GLOW WHEN LIGHT HITS THEM.

ICE CRYSTALS THAT GIVE OFF A SHINY GLOW WHEN LIGHT HITS THEM.

ICE CRYSTALS THAT GIVE OFF A SHINY GLOW WHEN LIGHT HITS THEM. THESE CRYSTALS ARE KNOWN AS

SHINY GLOW WHEN LIGHT HITS THEM. THESE CRYSTALS ARE KNOWN AS

SHINY GLOW WHEN LIGHT HITS THEM. THESE CRYSTALS ARE KNOWN AS DIAMOND DUST, WHICH USUALLY

THESE CRYSTALS ARE KNOWN AS DIAMOND DUST, WHICH USUALLY

THESE CRYSTALS ARE KNOWN AS DIAMOND DUST, WHICH USUALLY OCCURS IN ARCTIC AREAS.

DIAMOND DUST, WHICH USUALLY OCCURS IN ARCTIC AREAS.

DIAMOND DUST, WHICH USUALLY OCCURS IN ARCTIC AREAS. WHEN IT GETS THIS COLD, ORDINARY

OCCURS IN ARCTIC AREAS. WHEN IT GETS THIS COLD, ORDINARY

OCCURS IN ARCTIC AREAS. WHEN IT GETS THIS COLD, ORDINARY ROCKSALT LIKE THIS IS VIRTUALLY

WHEN IT GETS THIS COLD, ORDINARY ROCKSALT LIKE THIS IS VIRTUALLY

WHEN IT GETS THIS COLD, ORDINARY ROCKSALT LIKE THIS IS VIRTUALLY INEFFECTIVE.

ROCKSALT LIKE THIS IS VIRTUALLY INEFFECTIVE.

ROCKSALT LIKE THIS IS VIRTUALLY INEFFECTIVE. HERE IN ELMHURST, THEY TRY TO

INEFFECTIVE. HERE IN ELMHURST, THEY TRY TO

INEFFECTIVE. HERE IN ELMHURST, THEY TRY TO STICK TO REGULAR ROAD SALT UNTIL

HERE IN ELMHURST, THEY TRY TO STICK TO REGULAR ROAD SALT UNTIL

HERE IN ELMHURST, THEY TRY TO STICK TO REGULAR ROAD SALT UNTIL MERCURY'S FALSE TO A CERTAIN

STICK TO REGULAR ROAD SALT UNTIL MERCURY'S FALSE TO A CERTAIN

STICK TO REGULAR ROAD SALT UNTIL MERCURY'S FALSE TO A CERTAIN LEVEL.

MERCURY'S FALSE TO A CERTAIN LEVEL.

MERCURY'S FALSE TO A CERTAIN LEVEL. >> WE START TO ADD CALCIUM

LEVEL. >> WE START TO ADD CALCIUM

LEVEL. >> WE START TO ADD CALCIUM CHLORIDE SPRAYED ON AT THE BACK

>> WE START TO ADD CALCIUM CHLORIDE SPRAYED ON AT THE BACK

>> WE START TO ADD CALCIUM CHLORIDE SPRAYED ON AT THE BACK OF THE TRUCK AND WE CONTINUE TO

CHLORIDE SPRAYED ON AT THE BACK OF THE TRUCK AND WE CONTINUE TO

CHLORIDE SPRAYED ON AT THE BACK OF THE TRUCK AND WE CONTINUE TO USE THAT.

OF THE TRUCK AND WE CONTINUE TO USE THAT.

OF THE TRUCK AND WE CONTINUE TO USE THAT. REPORTER: THE CALCIUM CHLORIDE

USE THAT. REPORTER: THE CALCIUM CHLORIDE

USE THAT. REPORTER: THE CALCIUM CHLORIDE ADDS TO THE COST OF SNOW REMOVAL

REPORTER: THE CALCIUM CHLORIDE ADDS TO THE COST OF SNOW REMOVAL

REPORTER: THE CALCIUM CHLORIDE ADDS TO THE COST OF SNOW REMOVAL AND HAS EFFICACY AT THESE

ADDS TO THE COST OF SNOW REMOVAL AND HAS EFFICACY AT THESE

ADDS TO THE COST OF SNOW REMOVAL AND HAS EFFICACY AT THESE EXTREME TEMP -- AND LOSES

AND HAS EFFICACY AT THESE EXTREME TEMP -- AND LOSES

AND HAS EFFICACY AT THESE EXTREME TEMP -- AND LOSES EFFICACY AT THESE EXTREME

EXTREME TEMP -- AND LOSES EFFICACY AT THESE EXTREME

EXTREME TEMP -- AND LOSES EFFICACY AT THESE EXTREME TEMPERATURES.

EFFICACY AT THESE EXTREME TEMPERATURES.

EFFICACY AT THESE EXTREME TEMPERATURES. ANOTHER PHENOMENA THAT THE

TEMPERATURES. ANOTHER PHENOMENA THAT THE

TEMPERATURES. ANOTHER PHENOMENA THAT THE HISTORIC COLD CAUSES ARE ICE

ANOTHER PHENOMENA THAT THE HISTORIC COLD CAUSES ARE ICE

ANOTHER PHENOMENA THAT THE HISTORIC COLD CAUSES ARE ICE CREEKS -- ICE QUAKES.

HISTORIC COLD CAUSES ARE ICE CREEKS -- ICE QUAKES.

HISTORIC COLD CAUSES ARE ICE CREEKS -- ICE QUAKES. MOISTURE UNDERGROUND RAPIDLY

CREEKS -- ICE QUAKES. MOISTURE UNDERGROUND RAPIDLY

CREEKS -- ICE QUAKES. MOISTURE UNDERGROUND RAPIDLY FREEZES AND EXPANDS, CREATING

MOISTURE UNDERGROUND RAPIDLY FREEZES AND EXPANDS, CREATING

MOISTURE UNDERGROUND RAPIDLY FREEZES AND EXPANDS, CREATING THESE LOUD BOOMS.