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Post by hlsto2 on Aug 13, 2016 20:25:09 GMT -5
11. LTG well within 10 miles of this lawrs site...ignored by the tower. CLR at 2253 and 2353. lawrs goes AUTO at 0053 with TSNO. 140053Z AUTO 24004KT 10SM SCT080 SCT110 29/22 A3001 RMK AO2 SLP158 T02940222 TSNO 132353Z 22005KT 10SM CLR 32/21 A3000 RMK AO2 SLP154 T03170211 10350 20317 53005 132253Z 22005KT 10SM CLR 33/21 A2998 RMK AO2 SLP147 T03330211  |
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Post by hlsto2 on Aug 17, 2016 11:59:33 GMT -5
 171650Z 11006KT 4SM RA OVC008 24/23 A3014 171549Z 12007KT 7SM -RA BKN008 OVC012 24/23 A3014 171446Z 11007KT 7SM OVC008 24/23 A3012 171349Z 11006KT 5SM -RA OVC008 24/23 A3012 171254Z 11005KT 4SM BR OVC006 24/23 A3011 171146Z 12006KT 5SM BR OVC008 24/22 A3010 171135Z AUTO 13005KT 7SM OVC008 24/23 A3010 RMK AO2 LTG DSNT S T02380225 171115Z AUTO 14006KT 7SM OVC010 24/23 A3009 RMK AO2 T02380225 171055Z AUTO 13006KT 5SM BR BKN010 OVC013 24/23 A3009 RMK AO2 LTG DSNT S T02390225 10. appears ALDARS was on in AUTO mode...but lawrs turns off AWOS and goes manual. ltg 6-10 miles southeast of ap in this screen shot at 1642Z...but neither ALDARS or the ATCT takes any action. |
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Post by hlsto2 on Aug 18, 2016 1:39:24 GMT -5
because this lawrs tower does not turn ALDARS on...obvious TS (41 knot winds at 0304) is not reported... KSBY 180554Z AUTO 00000KT 10SM FEW003 23/22 A3005 RMK AO2 RAE35 SLP176 P0002 60078 T02280222 10289 20222 58009 TSNO $ KSBY 180543Z AUTO 00000KT 10SM FEW002 SCT095 23/22 A3005 RMK AO2 RAE35 P0002 T02280222 TSNO $ KSBY 180454Z AUTO 10005KT 10SM -RA FEW065 BKN090 BKN110 23/22 A3006 RMK AO2 SLP180 P0007 T02280222 403390222 TSNO $ KSBY 180401Z AUTO 32007KT 10SM -RA FEW120 23/22 A3007 RMK AO2 P0000 T02280217 TSNO $ KSBY 180354Z AUTO 31007KT 2SM -RA BR FEW120 22/22 A3007 RMK AO2 PK WND 26041/0304 WSHFT 0257 SLP184 P0051 T02220217 TSNO $ KSBY 180352Z AUTO 31005KT 2SM -RA BR FEW120 22/22 A3008 RMK AO2 PK WND 26041/0304 WSHFT 0257 P0051 TSNO $ KSBY 180328Z AUTO 26008KT 3SM RA BR BKN035 BKN120 22/22 A3009 RMK AO2 PK WND 26041/0304 WSHFT 0257 P0050 T02220217 TSNO $ KSBY 180317Z AUTO 26012G37KT 1 1/2SM +RA BR BKN030 BKN070 OVC100 22/22 A3008 RMK AO2 PK WND 26041/0304 WSHFT 0257 P0040 T02220217 TSNO $ KSBY 180303Z AUTO 27029G37KT 1 3/4SM +RA BR SCT027 BKN065 BKN080 24/23 A3009 RMK AO2 PK WND 25037/0303 P0015 T02440228 TSNO $ KSBY 180254Z AUTO 21006KT 10SM -RA FEW033 SCT055 BKN070 26/23 A3006 RMK AO2 PK WND 22029/0232 RAB32 SLP179 P0018 60018 T02560228 53014 TSNO $ KSBY 180243Z AUTO 18008G21KT 3SM +RA FEW038 SCT055 BKN070 26/21 A3004 RMK AO2 PK WND 22029/0232 RAB32 P0017 T02560211 TSNO $ KSBY 180238Z AUTO 22009G29KT 1 3/4SM +RA FEW027 SCT055 BKN070 27/21 A3004 RMK AO2 PK WND 22029/0232 VIS 3/4V5 RAB32 P0015 T02720211 TSNO $ KSBY 180154Z 00000KT 10SM CLR 27/24 A3003 RMK AO2 SLP170 T02670239 $ KSBY 180054Z 00000KT 10SM CLR 28/24 A3003 RMK AO2 SLP168 T02780244 $ KSBY 172354Z 00000KT 10SM CLR 29/24 A3001 RMK AO2 SLP164 T02890239 10333 20289 55001 $ KSBY 172254Z 29005KT 10SM BKN045 BKN055 31/23 A3001 RMK AO2 SLP163 T03110228 $ KSBY 172154Z 23006KT 10SM SCT045 BKN050 32/23 A3001 RMK AO2 SLP164 T03170228 $ KSBY 172054Z 30006KT 10SM SCT047 32/22 A3002 RMK AO2 SLP165 T03220222 56013 $ KSBY 171954Z VRB06KT 10SM SCT044 33/23 A3002 RMK AO2 SLP167 T03330228 $ KSBY 171854Z 29010KT 10SM BKN045 33/23 A3005 RMK AO2 SLP175 T03280228 $  |
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Post by hlsto2 on Sept 24, 2016 19:54:01 GMT -5
LTGCG 4-6 miles ENE of this lawrs site..ignored by the obstroller. I live 1.5 miles WEST of this ap..and I heard some pretty loud thunder. so...between obstrollers and ltg detection systems...fail. I will forward this to ajerk21 and weathermother for their expert investigation and explanation. I think their professional opinion and guidance is needed here. KFWS 242057Z 10009G14KT 10SM SCT050 32/21 A2993 KFWS 241957Z 10013G19KT 7SM BKN044 BKN050 32/22 A2996 KFWS 241853Z 12010KT 10SM BKN047 BKN065 32/21 A2999  |
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Post by hlsto2 on Sept 24, 2016 22:34:31 GMT -5
AUTO AWOS site reporting LTG more than 80 miles west of the ap. I thot the max reportable distance was 30NM? KFWS is lower center of graphic 1.5 miles east of home. KFWS 250315Z AUTO 16009G15KT 10SM SCT050 25/21 A2996 RMK AO2 LTG DSNT W AND NW T02480205 KFWS 250255Z AUTO 15009G14KT 10SM SCT047 SCT050 25/21 A2996 RMK AO2 T02480208 KFWS 250235Z AUTO 14006KT 10SM SCT048 25/21 A2995 RMK AO2 LTG DSNT W T02480205 KFWS 250215Z AUTO 16008G14KT 10SM CLR 25/21 A2995 RMK AO2 LTG DSNT NE AND W T02480205  |
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Post by hlsto2 on Sept 25, 2016 10:03:00 GMT -5
TS within 5 miles of ap...ignored by this lawrs site. 1447 s/b...1SM +TSRA. I know it says AUTO...but these are manual obs KADS 251447Z AUTO 31005KT 1SM OVC004 23/23 A3004 KADS 251347Z AUTO 02006KT 1SM OVC011 23/23 A3002 KADS 251327Z AUTO 02006KT 2SM BKN011 23/23 A3002 KADS 251247Z AUTO 02006KT 13SM BKN011 23/23 A3002  |
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Post by skobie on Sept 25, 2016 11:30:38 GMT -5
Who said it only reports lightning up to 30nm away? I must have missed that one. I've seen that damn thing report LTG over 100 miles away! Very realistic, but yet it can't report LTG VC or OHD?  skobie |
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Post by hlsto2 on Sept 25, 2016 12:01:50 GMT -5
I know both the ALS and ALDARS are only "supposed" to report DSNT lightning between 10 and 30NM. this according to the manual and weather mother. I know the ALS reports ltg beyond 30NM. I have seen the ALS report distant lightning 150 miles out. I have also seen ALDARS fail to report strikes between 10 and 30NM.
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Post by hlsto2 on Sept 25, 2016 12:08:30 GMT -5
same lawrs site FINALLY begins reporting TS activity several hours later...BUT...in present wx no TS entry...remarks indicate TS is 5-10 miles from ap.
KADS 251647Z AUTO 35010KT 7SM OVC0005 23/23 A3004 RMK TSRA VC LTG VC DSNT S AND NW
KADS 251547Z AUTO 04005KT 7SM OVC012 24/24 A3004
KADS 251447Z AUTO 31005KT 1SM OVC004 23/23 A3004
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Post by tornado on Apr 13, 2017 15:34:25 GMT -5
Sioux Falls, South Dakota, 28 Jul 2015:
I just went back and reviewed some older data. Sioux Falls (KFSD) is a part-time CWO site. Compare the observations before the Contract Weather Observer (CWO) arrived on duty in the morning (AUTO obs), to afterwards:
METAR KFSD 280756Z AUTO 20016G21KT 6SM -RA BR FEW016 FEW026 BKN075 23/22 A2975 RMK AO2 PK WND 17026/0703 RAB54 PRESRR SLP064 P0000 T02330217 $
SPECI KFSD 280801Z AUTO 18022G29KT 1 3/4SM +RA BR BKN018 BKN070 23/22 A2974 RMK AO2 PK WND 19029/0801 P0009 T02330217 $
SPECI KFSD 280809Z AUTO 15018G30KT 2SM -RA SCT019 OVC080 24/21 A2970 RMK AO2 PK WND 18030/0807 PRESFR P0026 T02390211 $
SPECI KFSD 280817Z AUTO 16015G29KT 10SM SCT022 BKN080 BKN095 24/22 A2970 RMK AO2 PK WND 18030/0807 RAE16 P0027 T02390217 $
METAR KFSD 280856Z AUTO 26006G19KT 10SM -RA FEW011 SCT065 OVC080 22/20 A2977 RMK AO2 PK WND 26031/0829 RAE16B19 SLP068 P0042 60045 T02220200 55002 $
SPECI KFSD 280947Z 03007KT 10SM -TSRA SCT090CB BKN110 OVC140 22/20 A2977 RMK AO2 TSB47 FRQ LTGICCC NE-S TS NE-S MOV E P0002 T02170200 $
METAR KFSD 280956Z 09012KT 10SM -TSRA SCT090CB BKN110 OVC140 22/21 A2976 RMK AO2 TSB47 SLP067 FRQ LTGICCC NE-SE TS NE-SE MOV E P0003 T02220206 $
SPECI KFSD 281007Z 11013KT 10SM -TSRA SCT090CB BKN110 OVC140 21/20 A2974 RMK AO2 WSHFT 0952 FRQ LTGICCC NE-SE TS NE-SE MOV E P0001 T02110200 $
Notice how there was no mention of lightning or thunder by ASOS, until the CWO arrived. So was there any lightning before then?
Yes:
 
There were 57 lightning bolts that struck within the red 5-mile range ring around KFSD! Those all met TS criteria; and there were plenty
more lightning strikes that met VCTS criteria. Can you see the difference between letting ASOS/ALDARS run on its own, and having a
contract weather observer on duty?
So where did ALDARS fail? In the detection phase? During the satellite uplink? We don't know. What we do know, is the one safeguard that
did work, was that the contract weather observer reported the lightning! |
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Post by hlsto2 on Apr 17, 2017 18:38:59 GMT -5
a number of ltg strikes within 10 miles of this ap...ignored by the ALS and LAWRS. I live 1.5 miles from this ap...and my el-cheapo ltg detector picked up 97 strikes... KFWS 172246Z 09008KT 10SM -RA SCT060 BKN070 OVC100 17/15 A3003 KFWS 172146Z 04009G18KT 4SM -RA SCT015 BKN047 OVC060 17/16 A3004 KFWS 172118Z 02013G18KT 3SM -RA BKN009 OVC043 17/16 A3007 KFWS 172047Z 33019G30KT 2SM +RA BKN005 OVC012 18/16 A3009 KFWS 172030Z 05013G18KT 3SM RA BKN009 BKN013 OVC035 19/17 A3005 KFWS 171950Z 02015G22KT 7SM BKN031 BKN042 OVC070 26/18 A3003  |
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