Severe Thunderstorm Warning 141, NWS Des Moines, IA

IAZALL-301630-

SPECIAL STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1048 AM CDT SAT JUN 30 1990

AT 1035 AM...INTENSE THUNDERSTORMS WERE LOCATED ALONG THE IOWA/MISSOURI
BORDER OVER EXTREME SOUTHEAST IOWA. THE STORMS WERE OCCURRING SOUTH OF
A LINE FROM 30 MILES SOUTHEAST OF OTTUMWA...NEAR KEOSAUQUA EAST TO
BURLINGTON. THE STRONGEST STORM WAS LOCATED NEAR DONNELLSON OR 20
MILES SOUTHWEST OF BURLINGTON.

LARGE HAIL...VERY HEAVY RAIN AND DAMAGING THUNDERSTORMS WINDS COULD
OCCUR WITH THESE STORMS.

FLOODING IS LIKELY PARTICULARLY IN LOW LYING AREAS AND AROUND SMALL
RIVERS AND STREAMS...AS SEVERAL STORMS HAVE MOVED OVER THIS AREA IN
THE PAST TWO HOURS.

THE THUNDERSTORMS
 WERE MOVING SOUTHEAST AT 25 MILES AN HOUR.

BARLOW

IAZALL-301730-

SPECIAL STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1148 AM CDT SAT JUN 30 1990

AT 1135 AM...INTENSE THUNDERSTORMS PERSISTED ALONG THE IOWA/MISSOURI
BORDER OVER EXTREME SOUTHEAST IOWA. THE STRONGEST STORM IN IOWA WAS
LOCATED IN SOUTHWEST VAN BUREN COUNTY NEAR THE TOWN OF CANTRIL...OR
35 MILES SOUTH SOUTHEAST OF OTTUMWA.

THIS STORMS WILL PRODUCE VERY HEAVY RAIN...FRQUENT DEADLY LIGHTNING AND
POSSIBLY SOME SMmALL HAIL.

A THUNDERSTORM HAD DEVELOPED OVER CENTRAL IOWA AND WAS LOCATED ABOUT
30 MILES NORTH OF DES MOINES NEAR NEVADA.

THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR.

BARLOW

IAZALL-301730-

SPECIAL STATEMENT AND RADAR SUMMARY...CORRECTED TYPO
NATIONAL WEATHER SERVICE DES MOINES IA
1148 AM CDT SAT JUN 30 1990

AT 1135 AM...INTENSE THUNDERSTORMS PERSISTED ALONG THE IOWA/MISSOURI
BORDER OVER EXTREME SOUTHEAST IOWA. THE STRONGEST STORM IN IOWA WAS
LOCATED IN SOUTHWEST VAN BUREN COUNTY NEAR THE TOWN OF CANTRIL...OR
35 MILES SOUTH SOUTHEAST OF OTTUMWA.

THIS STORM WILL PRODUCE VERY HEAVY RAIN...FREQUENT DEADLY LIGHTNING }AND
POSSIBLY SOME SMALL HAIL.

A THUNDERSTORM HAD DEVELOPED OVER CENTRAL IOWA AND WAS LOCATED ABOUT
30 MILES NORTH OF DES MOINES NEAR NEVADA.

THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR.

BARLOW

IAZALL-302000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1230 PM CDT SAT JUN 30 1990

...DANGEROUS HEAT AND HUMIDITY LEVELS OVER IOWA...

A POTENTIALLY DANGEROUS COMBINATION OF HEAT AND HUMIDITY IS BUILDING
OVER IOWA THIS AFTERNOON.  WHILE THE LAST FEW DAYS HAVE ALSO BEEN HOT
AND HUMID...CONDITIONS WILL BE FAR WORSE IN MOST AREAS THIS AFTERNOON.

ALREADY AT 12 NOON...TEMPERATURES IN THE STATE WERE HOVERING AROUND
THE 90 DEGREE MARK...WITH DEWPOINTS IN THE MIDDLE 70S.  THE HEAT INDEX..
WHICH IS A MEASURE OF THE COMBINED EFFECTS OF HEAT AND HUMIDITY...
WAS ALREADY AROUND THE 100 DEGREE MARK IN MANY AREAS.

AN ADDED STRESS IS BEING CAUSED BY A LACK OF WIND...AS SPEEDS THROUGHOUT
THE STATE WERE UNDER 10 MILES AN HOUR.

CONDITIONS WILL ONLY WORSEN DURING THE AFTERNOON...AS TEMPERATURES
CLIMB SLOWLY.

REMEMBER...IN THIS WEATHER YOU SHOULD SLOW DOWN AND TAKE IT EASY.
STRENOUS ACTIVITY CAN BE VERY DANGEROUS...ESPECIALLY FOR THOSE WHO ARE
NOT IN TOP PHYSICAL CONDITION.  IF WORKING OUTDOORS...TAKE FREQUENT
BREAKS...DRINK PLENTY OF NON-ALCOHOLIC BEVERAGES...AND TRY TO STAY OUT
OF THE DIRECT SUN.  IF POSSIBLE...TAKE ADVANTAGE OF AIR CONDITIONING.

THE LEAST SEVERE CONDITIONS WILL BE OVER THE NORTHWEST COUNTIES...AS
HUMIDITY LEVELS WILL BE SLIGHTLY LESS THAN ELSEWHERE IN THE STATE.
HOWEVER...TEMPERATURES IN THE NORTHWEST WILL STILL BE WELL INTO THE 90S.

TRUETT

IAZALL-301800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1230 AM CDT SAT JUN 30 1990

TO USERS OF IAWAS...

STATE RADIO CALLED AND STATED THAT THE PROBLEM WITH IAWAS IS BEING
WORKED ON BUT THEY DO NOT KNOW HOW LONG THEY IT WILL BE. PLEASE
PAY ATTENTION TO YOUR WIRES IN THE EVENT THAT SEVERE THUNDERSTORM
OR TORNADO WATCHES ARE ISSUED FROM THE NATIOMAL WEATHER SERVICE
AT OMAHA...DES MOINES...WATERLOO...MOLINE...DUBUQUE OR SIOUX CITY.

WEINBRECHT

IAZALL-301830-

SPECIAL STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1249 PM CDT SAT JUN 30 1990

AT 1235 PM...INTENSE THUNDERSTORMS PERSISTED ALONG THE IOWA/MISSOURI
BORDER OVER EXTREME SOUTHEAST IOWA. THE STRONGEST STORM IN IOWA WAS
LOCATED IN DAVIS COUNTY ABOUT 5 MILES EAST OF BLOOMFIELD OR ABOUT 20
MILES SOUTHEAST OF OTTUMWA.

THIS STORM WILL PRODUCE VERY HEAVY RAIN...FREQUENT DEADLY LIGHTNING AND
POSSIBLY SOME HAIL.

ISOLATED THUNDERSTORMS HAD DEVELOPED IN SOUTHWEST IOWA SOME 70 TO 85
MILES SOUTHWEST OF DES MOINES...JUST WEST OF VILLISCA AND 5 MILES
SOUTHEAST OF SHENANDOAH.

THE THUNDERSTORM OVER CENTRAL IOWA NORTH OF DES MOINES HAD DISSIPATED.

THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR.

BARLOW