Flash Flood Warning 28, NWS Des Moines, IA

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-071100-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
442 PM CDT MON JUL 6 1998

HAZARD--WIDESPREAD HEAVY RAIN OF 1 TO 3 INCHES AND ISOLATED AMOUNTS
UP TO 5. A FEW STORMS COULD ALSO PRODUCE WIND GUSTS TO 80 MPH AND
HAIL UP TO GOLFBALL SIZE.

AREA OF CONCERN--ALL OF CENTRAL IOWA.

TIMING DETAILS--THE HEAVY RAIN THREAT WILL LAST ALL NIGHT AND INTO
TUESDAY MORNING. THE SEVERE WEATHER THREAT WILL BE HIGHEST BETWEEN
800 PM AND 300 AM.

METEOROLOGICAL COMMENTS--A THUNDERSTORM COMPLEX HAS ALREADY
DEVELOPED OVER NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA THIS
AFTERNOON WITH NUMEROUS SEVERE THUNDERSTORM WARNINGS IN EFFECT.
WIND GUSTS UP TO 70 MPH AND 1 INCH DIAMETER HAIL HAVE ALREADY BEEN
REPORTED. THIS COMPLEX WILL MOVE INTO IOWA AFTER DARK AS IT FEEDS ON
EXTREMELY HIGH MOISTURE VALUES THROUGHOUT THE ATMOSPHERE.
PRECIPITABLE WATERS WERE APPROACHING 2 INCHES THIS AFTERNOON WITH
SURFACE DEWPOINTS APPROACHING 80 DEGREES. AS THE NIGHT WEARS ON THE
THUNDERSTORMS SHOULD BECOME WEAKER...BUT THEY WILL ALSO BEGIN TO
TRAIN ALONG AN EAST-WEST STATIONARY FRONT STUCK RIGHT OVER THE
HEART OF IOWA.

PRECAUTIONS--A FLASH FLOOD WATCH IS ALREADY IN EFFECT FOR THE ENTIRE
STATE...AND SEVERE THUNDERSTORM WATCHES MAY BE REQUIRED LATER THIS
EVENING. SPOTTER ACTIVATION IS A NEAR CERTAINTY TONIGHT...ESPECIALLY
IN THE NORTHWEST HALF OF THE STATE WHERE THE STORMS WILL LIKELY BE AT
THEIR STRONGEST LATE THIS EVENING.

PYTLAK

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-071100-

CENTRAL IOWA THUNDERSTORM OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
458 PM CDT MON JUL 6 1998

HAZARD--WIDESPREAD HEAVY RAIN OF 1 TO 3 INCHES AND ISOLATED AMOUNTS
UP TO 5. A FEW STORMS COULD ALSO PRODUCE WIND GUSTS TO 80 MPH AND
HAIL UP TO GOLFBALL SIZE.

AREA OF CONCERN--ALL OF CENTRAL IOWA.

TIMING DETAILS--THE HEAVY RAIN THREAT WILL LAST ALL NIGHT AND INTO
TUESDAY MORNING. THE SEVERE WEATHER THREAT WILL BE HIGHEST BETWEEN
800 PM AND 300 AM.

METEOROLOGICAL COMMENTS--A THUNDERSTORM COMPLEX HAS ALREADY
DEVELOPED OVER NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA THIS
AFTERNOON WITH NUMEROUS SEVERE THUNDERSTORM WARNINGS IN EFFECT.
WIND GUSTS UP TO 70 MPH AND 1 INCH DIAMETER HAIL HAVE ALREADY BEEN
REPORTED. THIS COMPLEX WILL MOVE INTO IOWA AFTER DARK AS IT FEEDS ON
EXTREMELY HIGH MOISTURE VALUES THROUGHOUT THE ATMOSPHERE.
PRECIPITABLE WATERS WERE APPROACHING 2 INCHES THIS AFTERNOON WITH
SURFACE DEWPOINTS APPROACHING 80 DEGREES. AS THE NIGHT WEARS ON THE
THUNDERSTORMS SHOULD BECOME WEAKER...BUT THEY WILL ALSO BEGIN TO
TRAIN ALONG AN EAST-WEST STATIONARY FRONT STUCK RIGHT OVER THE
HEART OF IOWA.

PRECAUTIONS--A FLASH FLOOD WATCH IS ALREADY IN EFFECT FOR THE ENTIRE
STATE...AND A TORNADO WATCH WILL BE ISSUED FOR NORTHWEST IOWA SHORTLY.
SPOTTER ACTIVATION IS A NEAR CERTAINTY TONIGHT...ESPECIALLY IN THE
NORTHWEST HALF OF THE STATE WHERE THE STORMS WILL LIKELY BE AT
THEIR STRONGEST LATE THIS EVENING.

PYTLAK
UPDATED TO MENTION IMPENDING TORNADO WATCH IN NORTHWEST IOWA

IAZ004-005-015-023-024-033-034-044-045-070340-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
844 PM CDT MON JUL 6 1998

...TORNADO WATCH HAS BEEN CANCELLED FOR PARTS OF WEST CENTRAL AND
NORTHWEST IOWA...

THE TORNADO WATCH THAT WAS IN EFFECT FOR PARTS OF WEST CENTRAL AND
NORTHWEST IOWA IS NO LONGER IN EFFECT. THE STRONGEST THUNDERSTORMS
HAVE SHIFTED SOUTHEAST OF THE AREA AN NO LONGER POSE A THREAT TO THE
AREA. THUNDERSTORMS WILL CONTINUE INTERMITTANTLY DURING THE NIGHT
BUT THE THREAT OF WIDESPREAD SEVERE WEATHER HAS ENDED.

SMITH

IAZ004-005-015-023-024-033-034-044-045-070340-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
844 PM CDT MON JUL 6 1998

...TORNADO WATCH HAS BEEN CANCELLED FOR PARTS OF WEST CENTRAL AND
NORTHWEST IOWA...

THE TORNADO WATCH THAT WAS IN EFFECT FOR PARTS OF WEST CENTRAL AND
NORTHWEST IOWA IS NO LONGER IN EFFECT. THE STRONGEST THUNDERSTORMS
HAVE SHIFTED SOUTHEAST OF THE AREA AN NO LONGER POSE A THREAT TO THE
AREA. THUNDERSTORMS WILL CONTINUE INTERMITTANTLY DURING THE NIGHT
BUT THE THREAT OF WIDESPREAD SEVERE WEATHER HAS ENDED.

SMITH