Area Forecast Discussion
Issued by NWS Pueblo, CO

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FXUS65 KPUB 290337
AFDPUB

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO CO
937 PM MDT MON JUL 28 2014

.UPDATE...
ISSUED AT 933 PM MDT MON JUL 28 2014

RADAR TRENDS THIS EVENING SHOW MUCH LESS ACTIVITY THAN LAST NIGHT.
HAVE CANCELLED THE FLASH FLOOD WATCH FOR THE FAR WESTERN PORTION
OF THE COUNTY WARNING AREA AS WELL AS THE NORTHERN
SECTIONS...INCLUDING EL PASO...PUEBLO AND TELLER COUNTIES. AREAS
THAT DID RECEIVE RAINFALL THIS EVENING HAD SIGNIFICANT AMOUNTS IN
SHORT PERIODS OF TIME. RADAR RAINFALL ESTIMATES DO SHOW THE
EFFECTS OF SOME HAIL WITH THE STORMS IN HUERFANO COUNTY. BELIEVE
THAT ANOTHER UPDATE SHORTLY BEFORE MIDNIGHT WILL ALLOW THE
REMAINDER OF THE FLASH FLOOD WATCH TO EXPIRE. STARK

&&

.SHORT TERM...(THIS EVENING THROUGH TUESDAY)
ISSUED AT 218 PM MDT MON JUL 28 2014

MONSOON MSTR REMAINS IN PLACE AND OVER THE SERN PLAINS DEW POINTS
ARE IN THE UPPER 50S TO LOWER 60S.  THE HRRR...RAP...ARW AND NAM ARE
SHOWING VERY LITTLE PCPN OVR THE SERN PLAINS THIS EVENING...SO WL
CUT BACK POPS A BIT FOR THIS AREA.  MAIN PCPN FOCUS IN THE MODELS
FOR TONIGHT IS OVER THE ERN MTNS (ESPECIALLY THE SANGRE DE
CRISTOS)...THE SW MTNS AND THE SAN LUIS VALLEY. THE HRRR AND ARW ARE
SHOWING THIS SCENARIO AND SO WL INCREASE THE POPS OVR THE SAN LUIS
VALLEY...AND WL EXTEND HIGH POPS A LITTLE LONGER INTO THE NIGHT OVR
THE SANGRES AND SW MTNS. EVEN THOUGH THE MODELS ARE NOT SHOWING A
LOT OF PCPN OVR THE SERN PLAINS...WHAT DOES DEVELOP WL HAVE THE
POTENTIAL TO PRODUCE HEAVY RAIN AND THUS WL NOT MAKE ANY CHANGES TO
THE FLASH FLOOD WATCH THAT IS IN EFFECT.  BURN SCARS WL BE THE MOST
SUSCEPTIBLE TO FLASH FLOODING TONIGHT...BUT AREAS THAT GOT A LOT OF
RAIN LAST NIGHT WL ALSO HAVE AN INCREASED RISK OF FLASH FLOODING IF
HEAVY RAIN MOVES OVR THOSE AREAS AGAIN.

MONSOON MSTR WL STILL BE OVR THE AREA ON TUE ALONG WITH GOOD LOW
LEVEL MSTR.  THE CONCERN FOR FLASH FLOODING INCREASES AS A WEATHER
DISTURBANCE MOVES OVR THE AREA.  WRN AREAS WL LIKELY SEE PCPN
ALREADY IN THE EARLY MORNING HOURS...AND INCREASING THROUGH THE
MORNING AND THEN SPREADING NORTH AND EAST.  WITH THE INCREASED
THREAT OF WIDESPREAD PCPN AND THE POTENTIAL FOR HEAVY RAIN...HAVE
DECIDED TO ISSUE A FLASH FLOOD WATCH FOR ALL OF THE AREA EXCEPT THE
SAN LUIS VALLEY.  LATER SHIFTS MAY HAVE TO BETTER REFINE THE TIMING
OF THE FLASH FLOOD WATCH AS NEWER HIGH RES MODEL DATA COMES IN.

.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)
ISSUED AT 218 PM MDT MON JUL 28 2014

...HIGH RISK OF FLOODING TUESDAY NIGHT THROUGH WEDNESDAY...

MAIN CONCERN IN THE EXTENDED WILL BE THE THREAT OF FLASH FLOODING
IN THE TUE NIGHT THROUGH WED PERIOD. ALL THE INGREDIENTS ARE IN
PLACE FOR THE POTENTIAL OF SIGNIFICANT FLOODING. MONSOONAL PLUME
IS SOLIDLY IN PLACE...AS EVIDENCED BY SAT IMAGERY...WITH DEEP
SUBTROPICAL MOISTURE PLUME IN PLACE. PREC H20 WILL REMAIN AT 1-1.5
INCHES OVER MOST OF OUR CWA...WHICH IS ON THE HIGH END OF LAYER
MOISTURE FOR OUR AREA. DEWPOINTS WILL REMAIN IN THE UPPER 50S-
LOWER 60S. UPSLOPE CONDITIONS WILL PERSIST OVER THE PLAINS. A
SHORTWAVE TROUGH NOW MOVING THROUGH IDAHO WILL PROVIDE THE SPARK
FOR WIDESPREAD MDT-HEAVY CONVECTION FROM TUE THROUGH THU
MORNING...AS IT SLOWLY MOVES IN NW FLOW ALOFT THROUGH NERN CO. IT
IS NOT THAT UNUSUAL TO SEE AN UPPER LEVEL DISTURBANCE LIKE THIS IN
LATE JULY...BUT THE TIMING WITH DEEP MOISTURE IN PLACE IS RATHER
UNUSUAL...AND WILL RESULT IN THE HIGHER THREAT POTENTIAL. NOT
SURPRISINGLY...MODEL SOLUTIONS ARE ALL OVER THE PLACE IN TERMS OF
WHERE THE HEAVIEST PRECIP WILL FALL. MOST OF THE GUIDANCE SUGGESTS
THE HEAVIEST PRECIP WILL BE CENTERED OUTSIDE OUR CWA...EITHER TO
THE N OR E WHERE SLIGHTLY BETTER UPPER SUPPORT FROM THE UPPER
SYSTEM MIGHT BE PRESENT. HOWEVER...ONCE AGAIN THE CONCEPTUAL MODEL
WILL LIKELY RULE OUT IN THIS CASE...AND IT MUST BE STRESSED THAT
ALL AREAS WILL BE UNDER THE GUN FOR SIGNIFICANT RAINFALL...WITH
WIDESPREAD 1-3 INCH TOTALS FOR THE PERIOD AND THE POSSIBILITY OF
LOCAL SPOTS THAT SEE CONSIDERABLY MORE. FLASH FLOODING THREAT
WILL BE GREATEST OVER THE WALDO CANYON AREA...THE ERN SLOPES ALONG
THE SRN FRONT RANGE...URBAN CORRIDORS...AND LOCATIONS THAT HAVE
SEEN THE MOST RECENT HEAVY RAINFALL...SUCH AS SERN EL PASO COUNTY.
MOST RECENT GUIDANCE SUGGESTS THE MAIN FOCUS FOR HEAVY RAIN WILL
REMAIN OVER NRN AND ERN PORTIONS OF OUR CWA TUE NIGHT...THEN
SHIFT SWD TO THE SRN MTS AND RATON AREA BY WED MORNING AND
AFTERNOON. IN FACT...WITH THE SLIGHTLY LATER TIMING OF THE UPPER
LOW...WE MAY SEE THE HIGHEST THREAT LEVEL ON WEDNESDAY. THE FLASH
FLOOD WATCH MAY HAVE TO BE EXTENDED FOR A GOOD PORTION OF THIS
PERIOD. WILL HAVE TO TAKE A WAIT AND SEE APPROACH FOR NOW...WHILE
STRESSING THAT THE FLOOD THREAT WILL BE HIGH DURING THE ENTIRE
STRETCH.

THE UPPER SYSTEM FINALLY MOVES OUT ON THURSDAY..AND THEN WE SHOULD
RETURN TO A MORE TYPICAL MONSOON PATTERN WITH SCT DIURNAL BASED
STORMS BEGINNING OVER THE MTS AND SPREADING OUT OVR THE PLAINS
LATER IN THE DAY. DEPENDING ON WHAT HAPPENS TUE-WED...THREAT FOR
MORE FLASH FLOODING AS WELL AS RIVER FLOODING WILL BE LIKELY
CONCERNS. TEMPS WILL REMAIN BELOW AVERAGE AS AFTERNOON HIGHS WILL
STAY IN THE LOWER 80S DURING THIS TIME. STAY WEATHER AWARE AND BE
ALERT FOR THE LATEST FORECASTS AND STATEMENTS ISSUED BY OUR
OFFICE. ROSE

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z TUESDAY AFTERNOON)
ISSUED AT 218 PM MDT MON JUL 28 2014

SHOWERS AND TSTMS WL BE POSSIBLE AT KCOS...KPUB AND KALS THIS
EVENING...PROBABLY ENDING BEFORE 04Z AT KCOS AND KPUB...BUT
CONTINUING LATER AT KALS.  SOME LOW STRATUS WL BE POSSIBLE AT THE
TERMINAL SITE TONIGHT.  SHOWERS AND TSTMS WL DEVELOP AGAIN ON TUE AT
THE TERMINAL SITES WITH HEAVY RAIN AGAIN BEING THE MAIN
THREAT...DECREASING CIGS AND VSBYS.


&&

.PUB WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING
FOR COZ058>068-072>089-093>099.

FLASH FLOOD WATCH UNTIL MIDNIGHT MDT TONIGHT FOR COZ072>075-
078>080-087-088-094.

&&

$$

UPDATE...STARK
SHORT TERM...28
LONG TERM...ROSE
AVIATION...28


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