Severe Thunderstorm Warning 4, NWS Fort Worth, TX

TXZ031-037-191345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
645 AM CST FRI JAN 19 1990

...A TORNADO WATCH IS IN EFFECT UNTIL 800 AM THIS FRIDAY MORNING FOR
BELL...BOSQUE...CORYELL...AND MCLENNAN COUNTIES OF CENTRAL TEXAS...

...A FLASH FLOOD WATCH IN EFFECT FOR THE EASTERN HALF OF CENTRAL TEXAS
INCLUDING WACO AND THE BRYAN/COLLEGE STATION AREA UNTIL 600 PM TODAY...

AT 640 AM CST LIGHT SHOWERS HAD FORMED OVER NORTHERN BOSQUE AND
NORTHERN HILL COUNTIES.  THE SHOWERS EXTENDED NORTH OF A LINE FROM
20 MILES SOUTHEAST OF HICO TO NEAR WHITNEY.  ELSESHERE...A LINE OF
THUNDERSTORMS...SOME WITH VERY HEAVY RAIN EXTENDED FROM BOWIE TO 15
MILES NORTHEAST OF GOLDTHWAITE.  THE HEAVIEST RAIN WAS OCCURRING OVER
COMANCHE FROM WEST OF HAMILTON TO NEAR DUBLIN.  THE THUNDERSTORMS WERE
MOVING NORTHEAST AT 40 MILES AN HOUR AND THE LINE WAS MOVING EAST AT
25 MILES AN HOUR.
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PERSONS IN CENTRAL TEXAS SHOULD BE ON THE LOOKOUT FOR FLASH FLOODING
TODAY.  THUNDERSTORMS ARE EXPECTED TO CONTINUE FORMING AND MOVING
ACROSS THE AREA PRODUCING OCCASIONAL HEAVY RAINS.  WITH THE GROUND
ALREADY SATURATED MOST OF THE WATER WILL RUN OFF.  PERSONS IN LOW
LYING AND FLOOD PRONE AREAS SHOULD BE READY TO MOVE TO HIGHER GROUND
IF FLOODING IS OBSERVED.

CENTRAL TEXANS SHOULD ALSO BE ALERT TO THE POSSIBLITY OF STRONG
THUNDERSTORMS MOVING ACROSS THE REGION.  THESE THUNDERSTORMS COULD
PRODUCE VERY HEAVY RAIN..STRONG GUSTY WINDS...DANGEROUS LIGHTNING
AND SMALL HAIL.

STAY TUNED TO NOAA WEATHER RADIO OR TO LOCAL RADIO AND TELEVISION
STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

TXZ031-037-191440-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
740 AM CST FRI JAN 19 1990

...THE TORNADO WATCH FOR BELL...BOSQUE...CORYELL...AND MCLENNAN
COUNTIES WILL EXPIRE AT 800 AM...

...A FLASH FLOOD WATCH IN EFFECT FOR THE EASTERN HALF OF CENTRAL TEXAS
INCLUDING WACO AND THE BRYAN/COLLEGE STATION AREA UNTIL 600 PM TODAY...

AT 735 AM CST A LINE OF THUNDERSTORMS...SOME WITH VERY HEAVY RAIN
EXTENDED FROM15 MILES NORTH OF LLANO TO NEAR GRANBURY.  THE HEAVIEST
RAIN WAS FALLING IN HAMILTON COUNTY NEAR HAMILTON AND IN SOMERVELL
COUNTY NORTHWEST OF GLEN ROSE.  THE THUNDERSTORMS WERE MOVING INTO
WESTERN BOSQUE AND WESTHERN CORYELL COUNTIES.

ELSEWHERE...MOSTLY LIGHT SHOWERS WERE OCCURRING OVER THE NORTHERN
SECTIONS OF CENTRAL TEXAS.  THE AREA EXTENDED NORTH OF A LINE FROM
20 MILES SOUTH OF MERIDIAN TO 25 MILES SOUTHWEST OF CORSICANA.  OTHER
SHOWERS EXTENDED FROM 10 MILES SOUTHEAST OF GATESVILLE TO NEAR
GEORGETOWN.

MOVEMENT OF THE LINE WAS EAST AT 25 MILES AN HOUR AND THE INDIVIDUAL
SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MPH.

PERSONS IN CENTRAL TEXAS SHOULD BE ON THE LOOKOUT FOR FLASH FLOODING
TODAY.  THUNDERSTORMS ARE EXPECTED TO CONTINUE FORMING AND MOVING
ACROSS THE AREA PRODUCING OCCASIONAL HEAVY RAINS.  WITH THE GROUND
ALREADY SATURATED MOST OF THE WATER WILL RUN OFF.  PERSONS IN LOW
LYING AND FLOOD PRONE AREAS SHOULD BE READY TO MOVE TO HIGHER GROUND
IF FLOODING IS OBSERVED.

CENTRAL TEXANS SHOULD ALSO BE ALERT TO THE POSSIBLITY OF STRONG
THUNDERSTORMS MOVING ACROSS THE REGION.  THESE THUNDERSTORMS COULD
PRODUCE VERY HEAVY RAIN..STRONG GUSTY WINDS...DANGEROUS LIGHTNING
AND SMALL HAIL.

STAY TUNED TO NOAA WEATHER RADIO .OR TO LOCAL RADIO AND TELEVISION
STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

TXZ026-191500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
800 AM CST FRI JAN 19 1990

...A LINE OF THUNDERSTORMS CONTINUE TO TRACK EAST ACROSS NORTH TEXAS...

AT 7:55 AM CST...RADAR INDICATED A LINE OF THUNDERSTORMS EXTENDING FROM
NEAR GAINESVILLE SOUTH TO DECATUR...GRANBURY...AND HAMILTON.  THIS LINE
OF STORMS WAS MOVING SLOWLY EAST WHILE  INDIVIDUAL  THUNDERSTORMS  WERE
MOVING NORTHEAST AT 40 MILES AN HOUR. ALTHOUGH RAIN WAS ALREADY FALLING
THROUGHOUT THE METROPLEX...THE RAINFALL  ASSOCIATED  WITH THE STORMS IN
THIS LINE WAS MORE INTENSE.

THE HEAVIEST RAINFALL WAS APPROACHING DECATUR...WEATHERFORD...AND  GLEN
ROSE AND MAY BE ACCOMPANIED BY GUSTY WINDS AND  SMALL  HAIL ALONG  WITH
STREET FLOODING.

THIS LINE OF STORMS SHOULD REACH THE WESTERN PART OF FORT WORTH SHORTLY
AFTER 8 AM AND CONTINUE EAST  THROUGH  THE REST OF THE METROPLEX DURING
THE MORNING HOURS.

SINCE THE RAIN BEGAN...BETWEEN TWO AND FOUR INCHES OF RAIN HAS DRENCHED
THE METROPLEX.  THIS  ADDITIONAL RAINFALL WILL CAUSE BRIEF LOCAL STREET
FLOODING.  MOTORISTS TRAVELING DURING THE MORNING RUSH HOUR  SHOULD  BE
ALERT OF HIGH WATER.   DO NOT  TRY AND CROSS WATER COVERED ROADS.  MOST
FLASH FfLOOD DEATHS ARE ASSOCIATED WITH CARS.

TXZ031-037-191545-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
850 AM CST FRI JAN 19 1990

...FLASH FLOOD WATCH CONTINUES IN EFFECT...

AT 842 AM CST A LINE OF NUMEROUS THUNDERSTORMS WITH VERY HEAVY RAIN
WAS NOTED FROM FORT WORTH TO BURNET.

THE LINE WAS MOVING EAST AT 30 MILES AN HOUR.

SHOWERS WERE ALSO NOTED FROM DALLAS TO WEST AND FROM NEAR CORSICANA TO
GEORGETOWN.

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND POSSIBLE
WARNINGS.

05

TXZ031-037-191700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
1012 AM CST FRI JAN 19 1990

...FLASH FLOOD WATCH CONTINUES IN EFFECT...

AT 1007 AM CST A LINE OF NUMEROUS THUNDERSTORMS WITH VERY HEAVY RAIN
WAS NOTED FROM DALLAS TO GEORGETOWN.

THE LINE WAS MOVING EAST AT 30 MILES AN HOUR.

SHOWERS WERE ALSO NOTED FROM NAVARRO MILLS LAKE TO CAMERON.

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND POSSIBLE
WARNINGS.}

05

TXZ019>033-192200-

SEVERE WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
1L00 AM CST FRI JAN 19 1990

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
FOR THAT PART OF NORTHEAST TEXAS EAST OF A LINE THROUGH SHERMAN...
GREENVILLE...WAXAHACHIE...AND WACO. THIS INCLUDES THE TYLER-
LONGVIEW AREA... BUT EXCLUDES THE DALLAS/FORT WORTH AREA.

LATE THIS MORNING A SURFACE LOW PRESSURE AREA WAS LOCATED NEAR
DALLAS... WITH A COLD FRONT STRETCHING SOUTH ALONG I-35 TO NEAR
AUSTIN AND SAN ANTONIO. TO THE EAST... A WARM FRONT EXTENDED FROM
THE LOW TO NEAR SHREVEPORT. SEVERE THUNDERSTORMS ARE MOST LIKELY
THIS AFTERNOON IN THE WARM SECTOR TO THE EAST OF THE COLD FRONT...
AND ALONG AND SOUTH OF THE WARM FRONT AS AN UPPER LEVEL DISTURBANCE
MOVES ACROSS THE WARM UNSTABLE AIR.

A STRONG LOW LEVEL JET CONTRIBUTING TO THE SEVERE WEATHER POTENTIAL
BY ADVECTING UNSEASONABLY WARM AND MOIST AIR INTO THE WARM FRONTAL
ZONE. ON THE OTHER HAND...THE UPPER LEVEL ENERGY WAS PASSING TO THE
NORTHWEST OF THE LOW AND WARM FRONT... SO THAT LOW LEVEL AND UPPER
LEVEL FORCING WERE NOT EXACTLY IN PHASE. THIS SITUATION COULD BE
CORRECTED BY AFTERNOON... THUS THE MODERATE SEVERE WEATHER THREAT.

ANOTHER  NEGATIVE FACTOR FOR THE FORMATION OF TORNADIC STORMS IS THE
WEAK TURNING OF THE WINDS IN THE LOWER LEVELS OF THE ATMOSPHERE. THIS
FACTOR COULD ALSO CHANGE THIS AFTERNOON AS A JET MAX ALOFT MOVES OVER
THE WARM AIR SECTOR. BETTER TURNING MAY ALSO SHOW UP NEAR THE SURFACE
INTERFACE OF THE WARM FRONT. OTHERWISE THE MAIN PROBLEM FROM SEVERE
THUNDERSTORMS WOULD BE HAIL AND STRONG WINDS.

THE SITUATION REMAINS VERY FAVORABLE FOR HEAVY RAINS. WINDS ALOFT
ARE ALMOST PARALLEL TO THE COLD FRONT... WHICH MEANS THE THUNDERSTORMS
ALONG THE COLD FRONT WILL MOVE VERY SLOWLY. DUE TO THE HEAVY RAINS
OF THE PAST TWO DAYS...ADDITIONAL RAINS WILL NOT SOAK IN...BUT RUN
OFF RAPIDLY INTO ALREADY SWOLLEN CREEKS AND STREAMS. URBAN AREAS WILL
BE PARTICULARLY SUSEPTIBLE TO FLOODING...AND A FLASH FLOOD WATCH
REMAINS IN EFFECT FOR NORTH TEXAS EAST OF A PARIS-CORSICANA- COLLEGE
STATION LINE.

SPOTTERS AND EMERGENCY MANAGEMENT OFFICIALS WILL WANT TO KEEP IN
TOUCH WITH LATEST WEATHER DEVELOPMENTS THIS AFTERNOON. ANOTHER
SEVERE WEATHER POTENTIAL STATEMENT WILL BE ISSUED AROUND 400 PM
THIS AFTERNOON...UNLESS SEVERE WEATHER IS ALREADY OCCURRING.

03