Hail in Colorado, July 21, 2013

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
535 PM MDT SUN JUL 21 2013

.SHORT TERM...(THIS EVENING THROUGH MONDAY)
ISSUED AT 200 PM MDT SUN JUL 21 2013

RISING HEIGHTS ASSOCIATED WITH THE RIDGE BUILDING ACROSS THE
ROCKIES WILL RESULT IN LITTLE IF ANY THUNDERSTORM DEVELOPMENT
TODAY. ONLY HOPE WILL BE TIED TO HEATING ON THE HIGHER COLORADO
TERRAIN AND A STORM MIGRATING FAR ENOUGH EAST BEFORE DISSIPATING
AFTER SUNSET. OVERNIGHT...MIGHT SEE SOME PATCHY FOG DEVELOP AGAIN
IN THE NORTHEAST CORNER AROUND MCCOOK WHERE SOUTHEASTERLY WINDS
WILL KEEP DEW POINTS HIGH...ELSEWHERE LIGHT DOWNSLOPING WINDS
SHOULD PREVENT FOG DEVELOPMENT. MONDAY...LITTLE SYNOPTIC CHANGE
ALOFT WITH THE UPPER RIDGE EXTENDING EASTWARD OVER THE CENTRAL
PLAINS. HOWEVER...THE LEE TROUGH AT THE SURFACE WILL MOVE INTO
THE SOUTHEAST PART OF THE FORECAST AREA...ROUGHLY HILL CITY TO
LEOTI...AND MAY INITIATE A FEW AFTERNOON/EVENING THUNDERSTORMS
WHICH WILL MOVE SOUTHEAST. TEMPERATURES WILL BE NEAR TO SLIGHTLY
ABOVE NORMAL.

.LONG TERM...(MONDAY NIGHT THROUGH SUNDAY)
ISSUED AT 229 PM MDT SUN JUL 21 2013

MONDAY NIGHT-WEDNESDAY...H5 RIDGE WILL GRADUALLY AMPLIFY ACROSS THE
NORTHERN ROCKIES...WHILE CWA REMAINS ON THE EASTERN PERIPHERY OF THE
RIDGE. FORECAST TDS...AS WELL AS PRECIPITABLE WATER VALUES INDICATE
AIR MASS WILL REMAIN FAIRLY HUMID THROUGH THE PERIOD DESPITE
UPSTREAM RIDGE AXIS. PRIOR TO WEDNESDAY...CANNOT RULE OUT A FEW
THUNDERSTORMS DURING THE AFTER NOON AND EVENING HOURS...BUT WITH
STRONG CINH AND WEAK LARGE SCALE FORCING DO NOT THINK MUCH MORE THAN
A 20 POP IS WARRANTED AT THIS POINT. BY WEDNESDAY CINH WEAKENS AS
MORE ORGANIZED SHORT WAVE TROUGH MOVES OVER RIDGE AXIS AND INTO
COLORADO. WILL PROBABLY SEE BEST CHANCE FOR PRECIP IN THE LATE
AFTERNOON AND INTO THE EVENING HOURS. OTHERWISE...EXPECT HUMID AIR
MASS TO SUPPORT AT LEAST PATCHY FOG IN SOME AREAS EACH MORNING.

IN THE EXTENDED...MEDIUM RANGE MODELS BEGIN TO DIVERGE FAIRLY
QUICKLY WITH RESPECT TO SHORT WAVE TROUGH MOVING ACROSS THE AREA
WITH ECMWF MAINTAINING A MUCH STRONGER TROUGH THAN OTHER MODELS. FOR
THE TIME BEING...THINK FOLLOWING CONSENSUS IS BEST BET FOR THE
PERIOD WITH CWA REMAINING IN NORTHWEST FLOW WITH SEVERAL CHANCES FOR
PRECIPITATION THROUGH THE PERIOD. BEST CHANCES LOOK TO BE WEDNESDAY
NIGHT AND THURSDAY WITH SLOW MOVING SHORT WAVE TROUGH CROSSING THE
AREA. WITH SEVERAL ROUNDS OF PRECIPITATION/CLOUD COVER/REMNANT
OUTFLOW BOUNDARIES THINK KEEPING TEMPS ON THE COOLER SIDE OF DATA
WARRANTED AT THIS POINT IN TIME.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z MONDAY EVENING)
ISSUED AT 533 PM MDT SUN JUL 21 2013

THE MAIN STORY FOR THE TAF PERIOD IS THE WEAK FRONTAL PASSAGE
THAT WILL SHIFT WIND DIRECTION. SOME GUSTY WINDS ARE LIKELY AS THE
FRONT PASSES IN THE MORNING FOR KGLD. THE FRONTAL PASSAGE WILL
AFFECT KMCK LATER IN THE TAF PERIOD...WITH WINDS CHANGING FROM
SOUTHEAST TO NORTHEAST. SOME PATCHY FOG COULD DEVELOP IN THE
VICINITY OF THE TERMINALS TOWARDS SUNRISE WITH CLEARING SKIES AND
APPROACHING FRONT...BUT NOT MENTIONED IN THE TAFS AT THIS TIME.
OTHERWISE...CEILING HEIGHTS AND VISIBILITIES ARE EXPECTED TO BE
VFR THROUGHOUT THE PERIOD FOR BOTH TAF SITES.

&&

.GLD WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
CO...NONE.
NE...NONE.
&&

SHORT TERM...024
LONG TERM...JRM
AVIATION...MK

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GOODLAND KS
615 PM MDT SUN JUL 21 2013

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-231215-
YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON-
SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA-
DUNDY-HITCHCOCK-RED WILLOW-
615 PM MDT SUN JUL 21 2013 /715 PM CDT SUN JUL 21 2013/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST
NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO.

.DAY ONE...TONIGHT

A FEW THUNDERSTORMS WILL MOVE ACROSS EASTERN COLORADO THROUGH 9 PM
MDT. SOME STORMS WILL PRODUCE HAIL AND BRIEF HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED ACROSS EASTERN COLORADO.

MENTZER

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
622 PM MDT SUN JUL 21 2013

COZ091-220045-
KIT CARSON COUNTY-
622 PM MDT SUN JUL 21 2013

...THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY FOR KIT CARSON COUNTY IN EAST CENTRAL COLORADO...

AT 617 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM THURMAN TO 7 MILES
NORTHWEST OF SEIBERT...MOVING SOUTHEAST AT 20 MPH.

PENNY TO NICKEL SIZE HAIL...AND WINDS TO 50 MPH ARE EXPECTED WITH
THESE STORMS. RAINFALL RATES UP TO ONE HALF OF AN INCH PER HOUR WILL
ALSO BE POSSIBLE WITH THESE STORMS.

&&

LAT...LON 3920 10316 3956 10316 3957 10315 3957 10257
      3905 10243 3904 10317 3912 10317
TIME...MOT...LOC 0021Z 324DEG 17KT 3959 10314 3938 10291

ROBINSON

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
652 PM MDT SUN JUL 21 2013

COZ091-220115-
KIT CARSON COUNTY-
652 PM MDT SUN JUL 21 2013

...THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY FOR KIT CARSON COUNTY IN EAST CENTRAL COLORADO...

AT 648 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS 8 MILES NORTH OF FLAGLER...MOVING SOUTHEAST AT
25 MPH.

PENNY TO NICKEL SIZE HAIL...AND WINDS TO 50 MPH ARE EXPECTED WITH
THESE STORMS. RAINFALL RATES UP TO ONE HALF INCH PER HOUR ARE ALSO
POSSIBLE WITH THESE THUNDERSTORMS.

&&

LAT...LON 3956 10316 3957 10315 3958 10295 3957 10271
      3905 10237 3904 10317
TIME...MOT...LOC 0051Z 121DEG 14KT 3941 10303

ROBINSON