AIRMET AREA FORECAST, SOUTHERN REGION,
AMEND TO INCLUDE:
*
VALID JAN 15/2300Z TO 16/0700Z.
MET-SITUATION:
A COLD FRONT LIES, SOUTHEND, TO BIRMINGHAM AND
THROUGH SWANSEA, MOV S AT 20KT. TO THE S OF THE
FRONT, A STABLE WSW FLOW PREVAILS.
STRONG WIND WRNG:
WINDS:
1000FT:
3000FT:
6000FT:
OCNL GUSTS OF 25KT NR COLD FRONT AND TROUGH.
N OF FRONT: 340/30KT. PS01. S OF FRONT: 270/15KT PS05.
N OF FRONT: 360/35KT. ZERO. S OF FRONT: 250/20KT PS02.
N OF FRONT: 360/35KT. MS04. S OF FRONT: 250/25KT MS02.
FREEZING LEVEL:
2000FT N OF FRONT, 5000FT S OF FRONT.
WEATHER-CONDITIONS:
ZONE 1:
4 ZONES
AT
00Z:
N OF A LINE LYING, NORWICH, TO EAST MIDLANDS AND THROUGH
ANGLESEY, MOVING S AT 20KT:
GEN 30KM IN NIL WX WITH 2-5/8CUSC 2000-3000FT/6000.
WDSPR, 7KM IN SHRA, WITH 0-5/8ST 1000FT/1500, AND 7-8/8CU 15002500/15000.
ISOL TROUGH, 4000M IN HEAVY RASH OR TSGS, WITH 0-5/8ST 1000FT/1500
AND 7/8CB 1500FT/23000.
WRNG:
ISOL HILL FG. MOD ICE AND MOD TURB IN CLD. TS. SEV ICE AND
SEV TURB IN CB. OCNL MOD, ISOL SEV, TURB BLW 6000FT. SN ON
MON ABOVE 1500FT N OF FRONT.
ZONE 2:
S OF ZONE 1 AND N OF A LINE LYING, CALAIS, TO GATWICK, TO
BRISTOL AND THROUGH LANDS END, MOVING S AT 20KT:
20KM IN OCNL RA, WITH 3-6/7CUSC 1500FT/7000, AND 68/8ACAS 8000FT/12000.
OCNL, 6KM IN RA, WITH 6-8/8CUSC AND AC 1500-2000FT/15000.
ISOL BUT OCNL FRONT, 2000M IN RADZ OR HVY RA WITH 4-6/8ST 5001000FT/1500FT AND 6-8/8CUSC AND ACAS LYR 800FT/15000.
WRNG:
HILL FG. MOD ICE AND MOD TURB IN CLD. SN MON ABOVE
3000FT N OF FRONT.
ZONE 3:
REST OF REGION:
GEN 25KM WITH 0-2/8SC 5000FT/6000.
WRNG:
ISOL HILL FG. MOD ICE AND MOD TURB IN CLD. ISOL MOD TURB
BLW 6000FT.
ZONE 4:
WRNG:
OUTLOOK: UNTIL APR
25/1300Z:
FG CLEARS BY 12Z, OTHERWISE SIMILAR.