021  
FXUS63 KDVN 291128  
AFDDVN  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE QUAD CITIES IA IL  
628 AM CDT THU JUL 29 2021  
   
..AVIATION UPDATE
 
 
   
SYNOPSIS
 
 
ISSUED AT 352 AM CDT THU JUL 29 2021  
 
THUNDERSTORMS WITH DAMAGING WINDS WERE MOVING THROUGH THE HIGHWAY 20  
CORRIDOR EARLY THIS MORNING. OTHERWISE THE WARM AND MUGGY CONDITIONS  
CONTINUED. TEMPERATURES WERE IN THE MID 70S TO LOWER 80S. DEW POINTS  
WERE MAINLY IN THE MID AND UPPER 70S.  
 

 
   
SHORT TERM
 
(TODAY AND TONIGHT)  
ISSUED AT 352 AM CDT THU JUL 29 2021  
 
1) HEAT AND HUMIDITY CONTINUES ROUGHLY ALONG AND SOUTH OF I-80  
 
2) SLIGHT RISK FOR SEVERE STORMS THIS AFTERNOON INTO THE EVENING  
SOUTH OF HIGHWAY 34.  
 
TODAY, THE MORNING ACTIVITY IS EXPECTED TO MOVE SOUTHEAST AND  
DIMINISH AROUND DAYBREAK. A COLD FRONT WILL DROP SOUTH THROUGH  
THE AREA THIS MORNING WITH REDEVELOPMENT OF SHOWERS AND STORMS  
ACROSS THE SOUTH CWA THIS AFTERNOON ALONG THE FRONT. SPC HAS A  
SLIGHT RISK OF SEVERE STORMS WITH DAMAGING WIND GUSTS AND LARGE  
HAIL THE MAIN THREAT. AREAS MOST AT RISK ARE THE SOUTHERN TIER OF  
COUNTIES FROM 2 PM TO 7 OR 8 PM WHEN THE ACTIVITY SHOULD MOVE  
SOUTH OUT OF THE AREA. TEMPERATURES WILL BE IN THE UPPER 80S AND  
LOWER 90S WITH A FEW MID 90 READINGS IN THE SW CWA. RELIEF FROM  
THE HEAT WILL WORK SOUTHWARD THROUGH THE AREA AS THE FRONT MOVES  
SOUTHWARD WITH DEW POINTS SLOWLY DROPPING INTO THE 60S TO NEAR 70  
AND WINDS INCREASING OUT OF THE NORTH. THE HEAT ADVISORY WILL  
REMAIN IN EFFECT FOR THE SOUTHERN HALF OF THE CWA WITH HEAT  
INDICES IN THE 100 TO 105 DEGREE RANGE WITH LOCALLY HIGHER  
READINGS AT TIMES. TONIGHT, QUIET AND LESS HUMID CONDITIONS WILL  
BE FOUND WITH LOWS IN THE LOWER 60S IN NW IL AND LOWER 70S IN NE  
MO.  
   
LONG TERM
 
(FRIDAY THROUGH WEDNESDAY)  
ISSUED AT 352 AM CDT THU JUL 29 2021  
 
KEY MESSAGES:  
 
1) MID 70S TO LOWER 80S RETURN FRIDAY THROUGH THURSDAY  
 
2) SHOWERS AND STORMS LIKELY MAINLY FRIDAY NIGHT AND SATURDAY  
MORNING IN THE SW HALF OF THE CWA  
 
3) DRY CONDITIONS SUNDAY THROUGH THURSDAY  
 
FRIDAY INTO SATURDAY, A DISTURBANCE IN NW FLOW WILL BRING SHOWERS  
AND STORMS TO THE SW HALF OR SO OF THE CWA MAINLY FRIDAY EVENING  
THROUGH SATURDAY MORNING. AFTER LOWS IN THE MID 50S TO MID 60S FROM  
NE TO SW EARLY SATURDAY, WITH THE RAIN, TEMPERATURES WILL STRUGGLE  
INTO THE LOW TO MID 70S IN WEST CENTRAL IL, WITH UPPER 70S AND LOW  
80S ELSEWHERE.  
 
SUNDAY THROUGH THURSDAY, HIGH PRESSURE WILL BE SLOWLY MOVING ACROSS  
THE AREA WITH DRY CONDITIONS AND TEMPERATURES BACK IN THE UPPER 70S  
TO LOW 80S FOR HIGHS AND PLEASANTLY COOL MID 50S TO LOWER 60S FOR  
LOWS. OPEN THE WINDOWS!  
 

 
   
AVIATION
 
(FOR THE 12Z TAFS THROUGH 12Z FRIDAY MORNING)  
ISSUED AT 620 AM CDT THU JUL 29 2021  
 
STORMS WILL CONTINUE TO IMPACT KMLI THROUGH ABOUT 13Z THIS  
MORNING. OTHERWISE, EXPECT A BOUNDARY TO DROP SOUTH THROUGH THE  
AREA TODAY, BRING A SHIFT TO A NORTHERLY WIND. MAINLY VFR  
CONDITIONS WILL CONTINUE. ONE POSSIBLE EXCEPTION IS POTENTIAL FOR  
DEVELOPMENT OF STORM NEAR KBRL THIS AFTERNOON. THIS WILL DEPEND ON  
HOW FAR SOUTH THE BOUNDARY PUSHES THROUGH THE DAY. WITH A HIGH  
LEVEL OF UNCERTAINTY, HAVE NOT INCLUDED IN THE 12Z TAF.  
 

 
   
DVN WATCHES/WARNINGS/ADVISORIES
 
 
IA...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR CEDAR-DES MOINES-  
HENRY IA-IOWA-JEFFERSON-JOHNSON-KEOKUK-LEE-LOUISA-MUSCATINE-  
SCOTT-VAN BUREN-WASHINGTON.  
 
IL...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR HANCOCK-HENDERSON-  
HENRY IL-MCDONOUGH-MERCER-ROCK ISLAND-WARREN.  
 
MO...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR CLARK-SCOTLAND.  
 

 
 

 
 
SYNOPSIS...14  
SHORT TERM...14  
LONG TERM...14  
AVIATION...RP KINNEY  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab IL Page
The Nexlab IA Page
The Nexlab MO Page Main Text Page