Post by tornado on Aug 22, 2016 8:55:06 GMT -5
This thread will be to identify issues with VCTS phenomena. Please feel free to add cases
when ALDARS misidentified a TS as a VCTS, or vice versa. These first cases show that
VCTS can be more hazardous than TS, with regards to wind.
Scottsdale, Arizona, Sat 20 Aug 2016:
SPECI KSDL 210050Z 04029G35KT 10SM VCTS BKN095 BKN120 34/11
A2985 RMK AO2 PK WND 04035/0050 WSHFT 0036 LTG
DSNT NW-NE
METAR KSDL 210053Z 05028G42KT 10SM VCTS BKN095 BKN120 34/10
A2984 RMK AO2 PK WND 04042/0051 WSHFT 0036 LTG
DSNT NW-NE SLP078 T03390100
SPECI KSDL 210118Z 03022G37KT 2SM +TSRA FEW050 FEW060 BKN090
27/16 A2986 RMK AO2 PK WND 03037/0112 LTG DSNT
N AND NW RAB12 TSB18 P0009 T02720156
Officially, the thunderstorm began at 0118Z. A gust to 42 knots occurred at 0051Z, during the VCTS.
The strongest wind gust was during the VCTS, 27 minutes before the start of the TS.
Salina, Kansas, Fri 19 Aug 2016:
METAR KSLN 192053Z 20013KT 10SM SCT050 SCT095 33/20 A2975
RMK AO2 LTG DSNT W-N SLP060 T03280200 56026
SPECI KSLN 192123Z 32024G34KT 9SM VCTS SCT019 BKN036 OVC100
24/18 A2977 RMK AO2 PK WND 33034/2121 LTG DSNT
ALQDS T02390183
SPECI KSLN 192131Z 33028G46KT 9SM VCTS -RA FEW019 BKN046
OVC095 22/18 A2978 RMK AO2 PK WND 34046/2124 WSHFT
2111 LTG DSNT ALQDS RAB30 P0000 T02220183
SPECI KSLN 192139Z 33026G35KT 10SM -TSRA FEW009 BKN043 OVC050
22/19 A2980 RMK AO2 PK WND 34046/2124 WSHFT 2111
LTG DSNT ALQDS RAB30 TSB37 P0000 T02170189
Officially, the thunderstorm began at 2137Z. A gust to 46 knots occurred at 2124Z, during the VCTS.
The strongest wind gust was during the VCTS, 13 minutes before the start of the TS.
Flint, Michigan, Wed 17 Aug 2016:
METAR KFNT 171753Z 22013G16KT 10SM VCTS FEW044 SCT050 31/18
A3003 RMK AO2 LTG DSNT W-N SLP162 T03110183 10317
20217 55016 $
SPECI KFNT 171801Z 29028G40KT 2 1/2SM R09/2600VP6000FT VCTS
-RA SQ SCT044 BKN055 26/18 A3005 RMK AO2 PK WND
29040/1758 LTG DSNT SW-N RAB01 PRESRR P0000 T02610183 $
SPECI KFNT 171803Z 29022G40KT 1 1/4SM R09/2600VP6000FT +TSRA
SQ FEW038 SCT044 BKN050 23/18 A3006 RMK AO2 PK
WND 29040/1758 LTG DSNT SW-N RAB01 TSB03 PRESRR
P0000 T02280178 $
Officially, the thunderstorm began at 1803Z. A gust to 40 knots occurred at 1758Z, during the VCTS.
The strongest wind gust was during the VCTS, rather than the TS.
Burke Lakefront Airport, Cleveland, Ohio, 13 Aug 2016:
SPECI KBKL 131840Z 29023G32KT 10SM TS SCT050 BKN070 BKN090
27/23 A2980 RMK AO2 PK WND 29032/1839 WSHFT 1826
LTG DSNT W-NE RAB00E10 TSB35 P0000 T02720233
METAR KBKL 131853Z 29023G30KT 10SM VCTS FEW040 BKN050 OVC070
26/23 A2982 RMK AO2 PK WND 29032/1839 WSHFT 1826
LTG DSNT W-NE RAB00E10 TSB35E50 SLP092 P0000 T02610233
METAR KBKL 131953Z 24008KT 10SM VCTS BKN049 BKN065 OVC090
27/24 A2981 RMK AO2 LTG DSNT ALQDS SLP089 T02670239
SPECI KBKL 132021Z 25026G43KT 3/4SM VCTS RA BR SCT011 BKN021
OVC070 24/22 A2985 RMK AO2 PK WND 26043/2013 LTG
DSNT ALQDS RAB07 PRESRR P0013 T02440222
METAR KBKL 132053Z 22013KT 10SM FEW050 BKN075 BKN090 24/22
A2984 RMK AO2 PK WND 26043/2013 LTG DSNT ALQDS
RAB07E52 SLP099 P0018 60018 T02440217 53014
Officially, the thunderstorm ended at 1850Z. A gust to 43 knots occurred at 2013Z, but there were no TSB/TSE times included;
as only a VCTS was recorded during that later hour.
Wheeling, West Virginia, Tue 16 Aug 2016:
METAR KHLG 162053Z 24009G21KT 10SM SCT048 BKN060 BKN080 29/20
A3005 RMK AO2 LTG DSNT SW-N SLP166 T02940200 55018
SPECI KHLG 162107Z 27029G46KT 10SM VCTS SQ FEW022 BKN047
BKN065 28/20 A3008 RMK AO2 PK WND 25046/2107 LTG
DSNT ALQDS PRESRR T02830200
SPECI KHLG 162110Z 27023G46KT 1 1/4SM R03/3500VP6000FT VCTS
-RA SQ SCT020 BKN047 OVC080 26/20 A3010 RMK AO2
PK WND 25046/2107 LTG DSNT ALQDS RAB09 PRESRR
P0011 T02560200
SPECI KHLG 162112Z 27019G46KT 1/2SM R03/2600VP6000FT +TSRA
SQ SCT015 BKN043 OVC070 24/21 A3010 RMK AO2 PK
WND 25046/2107 LTG DSNT ALQDS RAB09 TSB12 PRESRR
P0021 T02390206
Officially, the thunderstorm began at 2112Z. A gust to 46 knots occurred at 2107Z, during the VCTS.
The VCTS produced stronger winds, than did the TS.