Severe Thunderstorm Warning 170, NWS Des Moines, IA

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-182100-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
510 AM CDT THU JUN 18 1998

HAZARD--SCATTERED THUNDERSTORMS WITH HEAVY RAINFALL OF 2 TO 3
INCHES IN A FEW LOCATIONS...LARGE HAIL AND WIND GUSTS TO 60 MPH.

TIMING AND AREA OF CONCERN--THIS MORNING ALONG AND EAST OF A LINE
FROM FOREST CITY...TO WEBSTER CITY...TO DES MOINES...TO CRESTON.
THIS AFTERNOON OVER ALL OF CENTRAL AND EASTERN IOWA.

METEOROLOGICAL COMMENTS--EARLY THIS MORNING...A LINE OF STRONG
THUNDERSTORMS EXTENDING FROM NORTH-CENTRAL IOWA THROUGH CENTRAL IOWA
INTO SOUTHEAST IOWA WAS MOVING NORTHEAST AROUND 35 MPH.  THIS LINE
WILL BE CAPABLE OF PRODUCING DOWNBURST WINDS TO 70 MPH...HAIL TO ONE
INCH IN DIAMETER AND VERY HEAVY RAIN IN LOCALIZED AREAS.  ADDITIONAL
THUNDERSTORM REDEVELOPMENT IS LIKELY THIS AFTERNOON AS A COLD FRONT
OVER CENTRAL NEBRASKA MOVES INTO IOWA.  ABUNDANT LOW LEVEL MOISTURE
WILL STILL BE IN PLACE FOR THUNDERSTORM DEVELOPMENT.  ADDITIONALLY...
RIVERS CONTINUE TO RUN HIGH OVER THE STATE AND THE GROUND IS NEARLY
SATURATED.  SO ALTHOUGH THE STORMS SHOULD MOVE QUICKLY TO THE EAST
THIS MORNING AND AFTERNOON...LOCALIZED HEAVY RAINS COULD CAUSE STREET
FLOODING...SMALL STREAMS AND DITCHES WILL QUICKLY RISE SINCE COPIOUS
QUANTITIES OF WATER HAVE RECENTLY FALLEN OVER IOWA.  A FLASH FLOOD
WATCH REMAINS IN EFFECT FOR ALL OF CENTRAL AND EASTERN IOWA TODAY.

PRECAUTIONS--SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS MORNING
AND AFTERNOON TO REPORT WIND SPEEDS...HAIL SIZE...AND RAINFALL
AMOUNTS.  A FLASH FLOOD WATCH MEANS RAPIDLY RISING WATER OR FLOODING
IS POSSIBLE WITHIN THE WATCH AREA.  IF YOU ARE IN THE WATCH
AREA...CHECK PREPAREDNESS REQUIREMENTS...KEEP INFORMED...AND BE READY
FOR QUICK ACTION IF FLASH FLOODING IS OBSERVED OR IF A WARNING IS
ISSUED.

SEARCY

IAZ044-181125-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
521 AM CDT THU JUN 18 1998

...SEVERE THUNDERSTORM WATCH 602 HAS BEEN CANCELLED...

SEVERE WEATHER WAS NO LONGER EXPECTED OVER WESTERN IOWA THROUGH 600
AM.  THEREFORE THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT
UNTIL 600 AM HAS BEEN CANCELLED.

HOWEVER...ADDITIONAL THUNDERSTORMS WILL LIKELY REDEVELOP LATER
TODAY AHEAD OF AN EASTWARD MOVING COLD FRONT THAT IS OVER CENTRAL
AND EASTERN NEBRASKA EARLY THIS MORNING.

ADDITIONALLY...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR OF CENTRAL
AND EASTERN IOWA...INCLUDING CRAWFORD COUNTY.

KEEP AN EYE TO THE SKY TODAY AS THE WEATHER COULD BECOME ACTIVE
ONCE AGAIN.

SEARCY

IAZ016-017-025-026-036-037-048-181234-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
534 AM CDT THU JUN 18 1998

DOPPLER RADAR IS INDICATING AN AREA OF STRONG WINDS FROM NORTH OF
AMES TOWARDS MASON CITY ASSOCIATED WITH A LINE OF THUNDERSTORMS.
WIND GUSTS COULD REACH JUST BELOW SEVERE LIMITS...WITH GUSTS TO 50
MPH POSSIBLE. THE STRONG WINDS WILL PUSH TOWARDS A CHARLES CITY TO
WATERLOO LINE OVER THE NEXT HOUR.

MYERS