Severe Thunderstorm Warning 189, NWS Des Moines, IA

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-182200-

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

HAZARD--SEVERE THUNDERSTORMS WITH HAIL 1 INCH OR LARGER...
HEAVY RAINS AND DAMAGING WINDS.  AN ISOLATED TORNADO IS ALSO
POSSIBLE.

AREA OF CONCERN AND TIMING DETAILS--

THROUGH NOON--ALONG AND EAST OF A FORT DODGE-ATLANTIC LINE.
NOON TO 800 PM--MAINLY SOUTHEAST OF A FORT DODGE--CRESTON LINE.

METEOROLOGICAL COMMENTS--A COLD FRONT WILL BE THE FOCUS OF
THUNDERSTORM DEVELOPMENT THROUGH THE DAY.  AT 900 AM...THE
FRONT WAS LOCATED FROM NEAR SIOUX CITY TO JUST SOUTH OF OMAHA
INTO SOUTH CENTRAL KANSAS.  A WARM FRONT LOCATED NEAR I-80 WILL
ALSO MOVE NORTH TODAY PROVIDING ANOTHER FOCUS FOR CONVERGENCE.
WARM...UNSTABLE AND VERY MOIST AIR SOUTH OF THIS FRONT AND IS
EXPECTED TO PROVIDE PLENTY OF BUOYANCY FOR STRONG UPDRAFTS FOR
SEVERE THUNDERSTORMS TODAY.  A 100 KNOT SOUTHWESTERLY JET STREAM
WILL BE PUSHING NORTHEAST FROM THE TEXAS PANHANDLE TODAY
INTERSECTING 40 KNOT SOUTHERLY FLOW IN THE LOWEST 5000 FEET.  THIS
WILL CREATE FAVORABLE SHEAR FOR THE MAINTENANCE OF ROTATING
UPDRAFTS AND SEVERE STORMS.  ISOLATED SUPERCELLS ARE POSSIBLE...BUT
AT THIS TIME A SQUALL LINE IS EXPECTED TO FORM EVENTUALLY ALONG THE
COLD FRONT THIS AFTERNOON...SPREADING EASTWARD TOWARD EVENING.

PRECAUTIONS--EMERGENCY MANAGEMENT SHOULD PAY CLOSE ATTENTION TO
SHORT TERM FORECASTS AND FURTHER STATEMENTS TODAY.  SEVERE WEATHER
WATCHES MAY BE ISSUED LATER THIS MORNING OR EARLY AFTERNOON. SPOTTER
ACTIVATION WILL BE REQUIRED IN SEVERAL LOCATIONS. REPORT RAINFALL
AMOUNTS TO THE NATIONAL WEATHER SERVICE IF AVAILABLE.  A FLASH FLOOD
WATCH IS IN EFFECT TODAY.

KULA

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-182200-

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

HAZARD--SEVERE THUNDERSTORMS WITH HAIL 1 INCH OR LARGER...
HEAVY RAINS AND DAMAGING WINDS.  AN ISOLATED TORNADO IS ALSO
POSSIBLE.

AREA OF CONCERN AND TIMING DETAILS--

THROUGH NOON--ALONG AND EAST OF A FORT DODGE-ATLANTIC LINE.
NOON TO 800 PM--MAINLY SOUTHEAST OF A FORT DODGE--CRESTON LINE.

METEOROLOGICAL COMMENTS--A COLD FRONT WILL BE THE FOCUS OF
THUNDERSTORM DEVELOPMENT THROUGH THE DAY.  AT 900 AM...THE
FRONT WAS LOCATED FROM NEAR SIOUX CITY TO JUST SOUTH OF OMAHA
INTO SOUTH CENTRAL KANSAS.  A WARM FRONT LOCATED NEAR I-80 WILL
ALSO MOVE NORTH TODAY PROVIDING ANOTHER FOCUS FOR CONVERGENCE.
WARM...UNSTABLE AND VERY MOIST AIR SOUTH OF THIS FRONT AND IS
EXPECTED TO PROVIDE PLENTY OF BUOYANCY FOR STRONG UPDRAFTS FOR
SEVERE THUNDERSTORMS TODAY.  A 100 KNOT SOUTHWESTERLY JET STREAM
WILL BE PUSHING NORTHEAST FROM THE TEXAS PANHANDLE TODAY
INTERSECTING 40 KNOT SOUTHERLY FLOW IN THE LOWEST 5000 FEET.  THIS
WILL CREATE FAVORABLE SHEAR FOR THE MAINTENANCE OF ROTATING
UPDRAFTS AND SEVERE STORMS.  ISOLATED SUPERCELLS ARE POSSIBLE...BUT
AT THIS TIME A SQUALL LINE IS EXPECTED TO FORM EVENTUALLY ALONG THE
COLD FRONT THIS AFTERNOON...SPREADING EASTWARD TOWARD EVENING.

PRECAUTIONS--EMERGENCY MANAGEMENT SHOULD PAY CLOSE ATTENTION TO
SHORT TERM FORECASTS AND FURTHER STATEMENTS TODAY.  SEVERE WEATHER
WATCHES MAY BE ISSUED LATER THIS MORNING OR EARLY AFTERNOON. SPOTTER
ACTIVATION WILL BE REQUIRED IN SEVERAL LOCATIONS. REPORT RAINFALL
AMOUNTS TO THE NATIONAL WEATHER SERVICE IF AVAILABLE.  A FLASH FLOOD
WATCH IS IN EFFECT TODAY.

KULA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
957 AM CDT THU JUN 18 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0800 AM    CORYDON                   IA   WIND DAMAGE
06/18/98   WAYNE                          UTILITY POLES AND TREES
                                          DOWN, STRONG WINDS

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-190100-

CENTRAL IOWA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
1259 PM CDT THU JUN 18 1998

HAZARD--SEVERE THUNDERSTORMS WITH DAMAGING WINDS ABOVE 60 MPH...HAIL
1 INCH OR LARGER AND HEAVY RAINS.  URBAN AND SMALL STREAM FLOODING
IS LIKELY WITH THE HEAVIEST STORMS.

AREA OF CONCERN AND TIMING DETAILS--

EAST OF A POCAHONTAS--AUDUBON--BEDFORD LINE...OR VIRTUALLY ALL OF
CENTRAL INTO EASTERN IOWA FROM NOW UNTIL 600 PM.

METEOROLOGICAL COMMENTS--A COLD FRONT WAS APPROACHING A STORM LAKE--
AUDUBON--SHENANDOAH LINE AND WILL PUSH EAST THIS AFTERNOON.  THE
FIRST ROUND OF STORMS WHICH PRODUCED SEVERE WEATHER IN CENTRAL IOWA
WAS AFFECTING AREAS OF NORTH CENTRAL IOWA NORTH OF WEBSTER CITY UP
TOWARDS MASON CITY.  NEWER DEVELOPMENT WAS TAKING PLACE RAPIDLY
IN CENTRAL AND SOUTH CENTRAL IOWA FROM BOONE THROUGH CRESTON.  OTHER
STORMS MOVING INTO TAYLOR AND RINGGOLD COUNTIES FROM MISSOURI WILL
MOVE NORTHEAST AT 50 MPH ALSO.  ANY ONE OF THESE STORMS IS CAPABLE
OF SEVERE WEATHER.

PRECAUTIONS--EMERGENCY MANAGEMENT SHOULD PAY CLOSE ATTENTION TO
SHORT TERM FORECASTS AND FURTHER WARNINGS.   SPOTTER ACTIVATION WILL
BE REQUIRED IN SEVERAL LOCATIONS.  REPORT RAINFALL AMOUNTS TO THE
NATIONAL WEATHER SERVICE IF AVAILABLE.  A FLASH FLOOD WATCH IS ALSO
IN EFFECT TODAY.

KULA