What's an H5 pattern?

[Cookiely]

Also, the discussion talks about tropical waves coming over Florida.
000
FXUS62 KTBW 100617
AFDTBW

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
217 AM EDT MON JUL 10 2006

.SHORT TERM (TODAY - WED)...TUTT LIKE FEATURE OVER AND WEST OF THE
STATE THIS MORNING DRIFTS SLOWLY WEST ACROSS THE GULF THROUGH THE
PERIOD AS A WEAK H5 PATTERN GIVES WAY TO RIDGING BUILDING IN ACROSS
THE SOUTHEAST U.S FROM THE ATLANTIC. AT THE SURFACE HIGH PRESSURE
NEAR BERMUDA IS RIDGING WEST TO THE FL/GA BORDER THIS MORNING AS AN
INVERTED TROUGH APPROACHES SE FL. THIS TROUGH MOVES ACROSS SOUTH
FL TODAY FOLLOWED BY ANOTHER TROUGH TUE THAT LIFTS NORTHWESTWARD
WED AS THE RIDGE AXIS SHIFTS UP OVER THE SE COASTAL STATES BY WED.

THIS PATTERN WILL MOISTEN THE ATMOSPHERE WITH PWAT`S THAT RANGE
FROM 1.4-1.6 IN. TODAY TO 1.8-2.0 IN. WED WITH ISOLATED TO
SCATTERED CONVECTION (FROM N TO S) TODAY INCREASING INTO THE
NUMEROUS RANGE AREA WIDE BY THE END OF THE PERIOD AS THE TROUGH
MOVES UP. TEMPERATURES FOR THE FIRST HALF OF THE WEEK WILL STAY
CLOSE TO CLIMO. AS THE RIDGE BUILDS IN AND THEN LIFTS NORTH WINDS
WILL BE EAST TO SE ALTHOUGH THE GRADIENT WILL BE LIGHT ENOUGH
TODAY FOR AN AFTERNOON SEA BREEZE. THERE AFTER THE GRADIENT WILL
TIGHTEN ENOUGH TO KEEP ANY SEA BREEZES CLOSE TO THE COAST.

.LONG TERM (WED NGT-SUN)...THE LATEST GFS RUN BUILDS THE BERMUDA
HIGH WEST WITH A 5H596 CENTER NEAR THE SC/GA COAST ON DAY 1. ON DAY
2 THE HIGH CENTER SHIFTS FURTHER WEST TO OVER NE FL (JAX). THE
SURFACE HIGH PRESSURE RIDGE AXIS EXTENDS ALONG 30N THROUGH THE
ENTIRE PERIOD. WITH THE RIDGE AXIS THROUGH NORTHERN FLORIDA...A
TYPICAL EAST SOUTHEASTERLY FLOW WILL PERSIST ACROSS THE FLORIDA
PENINSULA. THIS WILL FORCE AFTERNOON SEABREEZE CONVECTION TO
DEVELOP BETWEEN THE I-75 CORRIDOR AND THE GULF BEACHES. AN EASTERLY
WAVE BRINGS DEEP TROPICAL MOISTURE WITH AN INCREASE IN SHOWERS AND
THUNDERSTORMS ON WEDNESDAY AND THURSDAY. THE GFS MOVES ANOTHER
TROPICAL EASTERLY WAVE THROUGH THE FLORIDA STRAITS ON SUNDAY...WILL
HAVE TO WAIT AND SEE ON THIS WAVE...SINCE MODEL HAS NOT BEEN VERY
CONSISTENT WITH THIS FEATURE. DURING THIS EXTENDED PERIOD...EXPECT
MAX/MIN TEMPERATURES TO NEAR CLIMATE NORMS.

&&

[x-y-no]

H5 referst to 500mb heights. So the H5 pattern is what's happening at mid-level of the troposphere.