Satellite Precipitation Estimates (TXUS20 KWBC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
TXUS20 KNES 180757
SPENES
ZCZC NFDSPENES ALL
SPENES
LAZ000-
.
SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/18/15 0756Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-683-1404
LATEST DATA USED: GOES-13: 0745ZDS
.
LOCATION...S LOUISIANA...
.
ATTN WFOS...LIX...LCH...
ATTN RFCS...LMRFC...
.
EVENT...LOCALLY HVY RAINS
.
SATELLITE ANALYSIS AND TRENDS...RECENT SATL/RADAR IMAGERY SHOWS NEW CNVCTN
THAT HAS DVLPD NR THE SRN END OF THE NOW DECAYING MCS OVER THE CENTRAL
PART OF THE STATE. UPSTREAM REMAINING STORMS THAT HAVE MOVED E FROM TX
ARE INTERACTING WITH THE OVERTURNED AIRMASS LEFT BEHIND THE MCS AND NEWLY
DVLPD CNVCTN OVER S LA IS NOW INTERCEPTING ANY GULF INFLOW. RECENT SFC
ANALYSIS DEPICTS AN E-W ORIENTED FRONTAL BNDRY ACROSS FAR SRN LA AND
AN INVERTED SFC TROF AXIS OVER THE WRN GULF PARALLELING THE TX COAST
TO JUST OFFSHORE S CENTRAL LA AND POSSIBLY EXTENDING FURTHER NE ACROSS
FAR SE LA. SPC MESOANLAYSIS DEPICTS ABOUT 1000J/KG SBCAPE ACROSS FAR
SE LA SITUATED ALONG/JUST SE OF THE ABOVE MENTIONED WEAK TROF AXIS. PW
VALUES OF NR 2" EXIST INVOF THE S CENTRAL LA COAST ALLOWING FOR EFFICIENT
RAINRATES. SRLY/SSWRLY FLOW AT 850MB CONTINUES TO PROVIDE WAA/DEEP LAYERED
MOISTURE CNVG OVER S CENTRAL/SE LA AS THE WRN GULF AIRMASS ENCOUNTERS
THE FRONTAL BNDRY.
.
AN ANNOTATED SATELLITE GRAPHIC SHOWING THE HEAVY PRECIPITATION
THREAT AREA SHOULD BE AVAILABLE ON THE INTERNET ADDRESS LISTED
BELOW IN APPROXIMATELY 10-15 MINUTES.
.
SHORT TERM OUTLOOK VALID 0800-1100Z...MEDIUM-HIGH CONFIDENCE FACTOR
IN SHORT TERM OUTLOOK...STORMS OVER SW LA SHOULD MERGE IN WITH NWD
MOVING SHWRS/TSTORMS DVLPG OFF THE GULF ALLOWING FOR BRIEF LOCALLY
HVY RAINS. HOWEVER BELIEVE MAIN THREAT FOR NEXT 2-3 HRS SHOULD BE
FROM ST. MARY/TERREBONNE PARISHES EWD ACROSS SE LA. ALTHOUGH FFG IS
RATHER HIGH...HVY RAINS SHOULD MOVE FROM W-E ACROSS THIS AREA BASED ON
PROPAGATION VECTORS. TD`S IN THE LOW 70S AND PW VALUES OF 1.8-2" SHOULD
ALLOW FOR FAIRLY EFFICIENT RAINRATES OF UP TO 2"/HR OR GREATER. UPSTREAM
CONVECTIVE ACTIVITY OVER THE GULF ALONG THE INVERTED TROF AXIS MAY FEED
NEWD ACROSS FAR S LA IN ADDITION TO POTENTIAL FOR POSSIBLE CONTINUING
STORM DVLPMT ON THE NOSE OF THE LLJ OVER FAR S CENTRAL LA FOR NEXT 1-2
HRS. EWD MOVEMENT MAY REPEAT OVER PORTIONS OF S CENTRAL/SE LA AFFECTED
BY THE INITIAL AREA OF CNVCTN OVER THE NEXT FEW HRS.
.
....NESDIS IS A MEMBER OF NWSCHAT (NESDISSATELLITEPRECIP)....
....NESDIS IS A MEMBER OF 12 PLANET....
.
FOR QUESTIONS AND COMMENTS CONCERNING THE SATELLITE
PRECIPITATION MESSAGES AND GRAPHICS PLEASE EMAIL
SSDPrecip@noaa.gov
.
FOR PRECIP MESSAGES AND GRAPHICS ON THE WEB:
http://www.ospo.noaa.gov/Products/atmosphere/spe/
.
FOR AUTOMATED SATELLITE PRECIPITATION ESTIMATES ON THE WEB:
http://www.star.nesdis.noaa.gov/smcd/emb/ff/CONUS.php
.
LAT...LON 3040 9339 2994 9094 2986 8895 2887 8892 2895 9084
2969 9354
.
NNNN


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.