Heat Bursts Produce Gusty Winds and
Rising Temperatures Overnight


...HIGHEST WINDS FROM JUNE 29TH, 2012... 

...LOCATION... ...TIME... ...WIND...
BROKEN BOW AIRPORT (CUSTER NE) (ASOS)      235 AM JUN 29      78 MPH  
NORTH PLATTE AIRPORT (LINCOLN NE) 200 AM JUN 29 64 MPH  
IMPERIAL AIRPORT (CHASE NE) (ASOS) 924 PM JUN 28 61 MPH  
3 S WHITECLAY (SHERIDAN NE) (NEDOR) 522 AM JUN 29 53 MPH  
3 E BIG SPRINGS (KEITH NE) (MESOWEST) 1000 PM JUN 28 50 MPH  
1 WNW RUSHVILLE (SHERIDAN NE) (NEDOR) 540 AM JUN 29 49 MPH  
1 SE WELLFLEET (LINCOLN NE) (NEDOR) 1123 PM JUN 28 47 MPH  
OGALLALA AIRPORT (KEITH NE) (AWOS) 1015 PM JUN 28 46 MPH  
12 W BIG SPRINGS (DEUEL NE) (NEDOR) 911 PM JUN 28 43 MPH  
1 S SUTHERLAND (LINCOLN NE) (NEDOR) 1147 PM JUN 28 39 MPH  
2 SE LEWELLEN (GARDEN NE) (NEDOR) 1025 PM JUN 28 36 MPH


----------------------------------------------------------------------
...HEAT BURSTS OCCUR ACROSS PARTS OF THE REGION...  
 
A PHENOMENA KNOWN AS HEAT BURSTS OCCURRED OVERNIGHT...CAUSING RAPID  
RISES IN TEMPERATURES AND DECREASES IN DEW POINT TEMPERATURES.  
THESE HEAT BURSTS WERE DETECTED BY AUTOMATED SURFACE OBSERVING  
STATIONS AT THE NORTH PLATTE AND BROKEN BOW AIRPORTS.  
 
A HEAT BURST IS A RARE ATMOSPHERIC PHENOMENON ASSOCIATED WITH GUSTY  
WINDS AND A RAPID INCREASE IN TEMPERATURE...AND A DECREASE IN DEW  
POINT TEMPERATURES. HEAT BURSTS CAN ALSO BE CHARACTERIZED BY  
EXTREMELY DRY AIR AND ARE SOMETIMES ASSOCIATED WITH VERY STRONG OR  
DAMAGING WINDS.  
 
IN BROKEN BOW...A DOWNBURST OCCURRED ALLOWING WARMER AIR ALOFT TO  
RAPIDLY DESCEND TO THE GROUND. AT 235 AM CDT...THIS DOWNBURST  
CAUSED WINDS TO GUST TO 78 MPH AT THE BROKEN BOW AIRPORT. THE  
TEMPERATURE ROSE FROM 73 TO 82 DEGREES AS THE DEW POINT TEMPERATURE  
FELL FROM 63 DEGREES TO 52 DEGREES.  
 
IN NORTH PLATTE...TWO SEPARATE DOWNBURSTS OCCURRED AT 139 AM CDT AND  
AGAIN AT 200 AM CDT. THE FIRST DOWNBURST HELPED CAUSE WIND GUSTS TO  
60 MPH...AS THE TEMPERATURE ROSE FROM 73 TO 81 DEGREES...AND THE  
SECOND DOWNBURST AT 200 AM CDT CAUSED A TEMPERATURE RISE FROM 73 TO  
81 DEGREES.

Page composition
by
Steve Carmel

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