Alert archive / New York / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 39, NWS Albany, NY
NWS Albany, NY issued this severe thunderstorm warning at Jul 18, 1999, 3:30 PM EDT for Washington 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 18, 1999, 3:30 PM EDT (19:30 UTC)
- Expired
- Jul 18, 1999, 4:30 PM EDT
- In force
- 60 min
- Issued by
- NWS Albany, NY
- Area
- Whole counties
County Washington County, NY
The radar
The Albany radar (KENX), 96 km from the middle of the area, began a volume at 19:30 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 18, 3:58 PM EDT | Thunderstorm Wind | Hudson Falls, 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, 7.5 hours before the alert went out and 77 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
- 1022 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1093 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KALB 181932 RRA SVRALB NYC115-182030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ALBANY NY 330 PM EDT SUN JUL 18 1999 THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN WASHINGTON COUNTY NEW YORK IN EASTERN NEW YORK * UNTIL 430 PM EDT * AT 325 PM EDT......NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG ROUTE 29 FROM SALEM TO GREENWICH...MOVING EAST SOUTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE... BETWEEN SHUSHAN AND WILLARD MOUNTAIN AT 345 PM EDT... BETWEEN CAMBRIDGE AND BUSKIRK AT 4 PM... NEAR WHITE CREEK AT 415 PM. THIS IS A DANGEROUS STORM! STAY INDOORS AWANY FROM WINDOWS. A FLASH FLOOD WARNING REMAINS IN EFFECT FOR ALL WASHINGTON COUNTY UNTIL 610 PM.
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 Albany, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 2:18 PM EDT, 1 hour 12 minutes earlier.
Area forecast discussion, Jul 18, 2:18 PM EDT, 1 hour 12 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ALBANY NY 215 PM SUN JUL 18 1999 .DISC... IN SVR WX MODE ATTM AS SVR CELLS HAVE POPPED UP ACRS WASHINGTON CNTY AND WERE MOVG SE....HAVE RECVD RPTS OF GOLF BALL SIZED HAIL ACRS THE FT ANN/SALEM CTY LN. .SYNOPSIS... SFC BNDRY LYING ACRS ERN NY HAS TRIGGERED QUICK DVLPG PULSE TYPE STRMS. USING THE CAROPOLO/CERNEGLIA/BLAES ET/VIL NOMOGRAM HV ISSUED SVR TSTM WRNGS FOR WASHINGTON AND BENNINGTON COUNTIES RIGHT NOW. MRNG ALB SNDGS INDCATE CAPE OF 3500 J/KG WITH A SLIGHT CAP AND LI OF -8. CAP HAS BKN AND EXPLOSIVE DVLPMNT OCCURRING. DAYTIME HEATING HAS CONTRIBUTED TO DSTBLZTN AND INCRSD CONVECTIVE DVLPMNT DURG THE PAST FEW HRS. DIVERGENT UPR FLW FLDS AHD OF WK S/WV EMBEDDED WITHIN STGR BND OF WESTERLIES...EVIDENT IN W/VP IMGRY...APPEARS TO BE ENHANCING ACTVTY...WHICH IS XPCTED TO INTENSIFY DURG THE NXT FEW HRS. SHEAR PROFILES ARE RATHER WK BUT MOVMNT OF STGR CELLS IN 20 TO 30 KT MEAN ENVIRONMENTAL FLW RGM WL ENHANCE POT FOR GUSTY WINDS APPRCHG OR XCEEDING SVR LIMITS. AS FAR THE FCST GOES...WL FOLLOW CLOSE TO MDLS ATTM AND WILL REVIEW LTR. .ALY...NONE. MAC
In the hours before
Local storm report, Jul 18, 1:54 PM EDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
154 PM EDT SUN JUL 18 1999
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0105 PM LAKE NEBO NY WIND DAMAGE
07/18/99 WASHINGTON TREES DOWN AND POWER LINES
DOWN
0141 PM FT ANN NY 1.75 INCH HAIL
07/18/99 WASHINGTON GOLF BALL SIZE HAIL ALONG
THE FORT ANN AND SALEM
COUNTY LINES
MACLocal storm report, Jul 18, 1:54 PM EDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
154 PM EDT SUN JUL 18 1999
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0105 PM LAKE NEBO NY WIND DAMAGE
07/18/99 WASHINGTON TREES DOWN AND POWER LINES
DOWN
0141 PM FT ANN NY 1.75 INCH HAIL
07/18/99 WASHINGTON GOLF BALL SIZE HAIL ALONG
THE FORT ANN AND SALEM
COUNTY LINES
MACThe office that day
Everything else NWS Albany, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 1:15 PM EDT | Severe Thunderstorm Warning | ALY | Washington | 30 min |
| Jul 18, 2:20 PM EDT | Severe Thunderstorm Warning | ALY | Washington | 60 min |
| Jul 18, 3:01 PM EDT | Severe Thunderstorm Warning | ALY | Saratoga | 64 min |
| Jul 18, 3:15 PM EDT | Flash Flood Warning | ALY | Washington | 3 hr |
| Jul 18, 3:30 PM EDT | Flash Flood Warning | ALY | Washington | 60 min |
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.