Alert archive / New York / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 19, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Jul 7, 1999, 7:55 PM EDT for Jefferson County, New York. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 7, 1999, 7:55 PM EDT (23:55 UTC)
- Expired
- Jul 7, 1999, 8:55 PM EDT
- In force
- 60 min
- Issued by
- NWS Buffalo, NY
- Area
- Whole counties
County Jefferson County, NY
The radar
The Ft Drum radar (KTYX), 40 km from the middle of the area, began a volume at 23:56 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 8:40 PM EDT | Thunderstorm Wind | Adams, NY |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 11.9 hours before the alert went out and 231 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1248 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBUF 072357 COR SVRBUF NYC045-080055- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTED FOR DATE NATIONAL WEATHER SERVICE BUFFALO NY 755 PM EDT WED JUL 7 1999 THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... JEFFERSON COUNTY IN CENTRAL NEW YORK * UNTIL 855 PM EDT * AT 745 PM ...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM TRENTON ONTARIO TO 5 MILES WEST OF CLAYTON NEW YORK....MOVING EAST AT 45 TO 50 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CLAYTON AT 750 PM WATERTOWN BETWEEN 800 AND 815 PM IF YOU ARE IN THESE AREAS...GET INSIDE. THESE STORMS HAVE DOWNED TREES AND POWER LINES` WITH WINDS GUSTS IN EXCESS OF 60 MPH AS THEY CROSSED THROUGH CANADA. TAN
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Buffalo, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 7, 3:08 PM EDT, 4 hours 47 minutes earlier.
Area forecast discussion, Jul 7, 3:08 PM EDT, 4 hours 47 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BUFFALO NY 308 PM EDT WED JUL 7 1999 ...UPDATED FOR SCA NRSHORES ON LAKES... VERY PLEASANT DAY IN PROGRESS ACROSS ENTIRE FCST AREA WITH DEW PTS DOWN IN 50S AND TEMPS CLOSE TO 80 WITH A FRESH WESTERLY BREEZE. LAKE SHADOWS EVIDENT ON VIS SATELLITE ON A 270 VECTOR WHICH FAVORS OSW CO AND CHAUT/SRN ERIE COS. NARROW RIBBON OF CONVERGENCE CLOUD ACROSS NIAG PEN INTO NRN SUBS OF BUF AND ON ACROSS GEN CO. SHWRS/TSTMS ASSOC WITH STRONG VORT OVR CNTRL ONT WITH CU ENHANCING N OF LK ONT BUT NOTHING ON TYX RADAR AS OF YET. THIS VORT SWINGS SE ACROSS NORTHERN NY THIS EVE AND MAY YET TRIGGER A SHWR OR TWO...WLL LEAVE IN MENTION OF 30 POP JEFF/LEW ONLY FOR EVE...OTHERWISE MAINLY CLEAR AFTER LOSS OF DAYTIME HEATING...P/CY E OF LK ONT CLOSER TO VORT. THURS LOOKS LIKE ANOTHER WINNER. WINDS A TAD LESS...700-850 TEMPS IDENTICAL TO TODAY...SO TEMPS WLL BE TOO...NR 80...A FEW DEG COOLER DOWNWIND OF LAKES. NEXT SYSTEM OF CONCERN IS DEVELOPING WARM FRONT THURS NT INTO FRI. ETA MOST AGGRESSIVE IN SHOWING VERY STRONG WARM ADVECTION MOVING INTO WRN COUNTIES AFTER MDNT WITH 12Z FRI 850 TEMPS FROM +9 AT ART TO +17 AT BUF. GOOD 40-50 KT LL JET SETS UP ACROSS LOWER LAKES BY 12Z FRI AS WELL. MOST FAVORABLE AREA WOULD BE TO OUR NORTH IN ONTARIO AND MOS AND FAN POPS VERY LOW FOR THURS NT...BUT WEE HOURS ARE PRIME FOR DEVELOPMENT OVR NEAR TROPICAL WATERS OF ERN LK ERIE...SO PUTTING THIS ALL TOGETHER...WLL GO LIKELY POPS FOR BUF-IAG AFTER MDNT AND SCATD FOR REST OF AREAS FROM ROC AREA WESTWARD TWD MORNING. FRI WILL BE AN UNSETTLED DAY BUT BEST DYNAMICS AND WIND FIELDS SKIRT REGION TO THE NORTH OVR SRN ONTARIO AND LK ONTARIO. WLL COVER WITH WINDY AND HUMID WITH SCATD SHWRS/TSTMS WEST...AND LIKELY E OF LK ONTARIO. LK ERIE WLL STABILIZE AFTERNOON BUF-ROC AREA SO WLL KEEP POPS IN CHC RANGE. SRN TIER ALSO CHC AS THEY WILL BE FURTHER FROM DYNAMICS. FURTHER AHEAD...NEXT S/W/FROPA LATER FRI NT AND SAT AM...LOOKS LIKE AN UNSETTLED START SAT THEN IMPROVEMENT...FINE SUNDAY. LOOKS LIKE WE ARE INTO A FAST SEMI-CYCLONIC FLOW NEXT WEEK WHICH WLL LEAD TO BREEZY SLIGHTLY COOLER THAN NORMAL WX WITH ONLY SCTD ACTIVITY FROM TIME TO TIME. THE A/CS WILL GET A BIT OF A REST. THATS IT FROM THE SUNNY BUF. WRKZONES BY 305. ON STREET BY 330. TAKE IT EASY. .BUF...SCA NRSHORES LKS ERIE AND ONT AND UPR NIAG RIV/BUF HRBR. MCLAUGHLIN
Nearby
Severe Thunderstorm Warnings in New York, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.