Alert archive / New York / Flash Flood Warnings in 1998
Flash Flood Warning 11, NWS New York, NY
NWS New York, NY issued this flash flood warning at May 31, 1998, 10:37 PM EDT for Orange County, New York. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 31, 1998, 10:37 PM EDT (02:37 UTC)
- Expired
- Jun 1, 1998, 12:35 AM EDT
- In force
- 118 min
- Issued by
- NWS New York, NY
- Area
- Whole counties
County Orange County, NY
The radar
The Albany radar (KENX), 133 km from the middle of the area, began a volume at 02:36 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 2.6 hours before the alert went out and 135 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
- 151 J/kg
- Mixed-layer CIN
- -348 J/kg
- Mixed-layer LCL
- 1224 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 233 m²/s²
- 0-3 km storm-relative helicity
- 319 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 KNYC 010238 FFWNYC NYC071-010435- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW YORK NY 1037 PM EDT SUN MAY 31 1998 THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A * FLASH FLOOD WARNING FOR... ORANGE COUNTY IN SOUTHEASTERN NEW YORK * UNTIL 1235 AM EDT * AT 1030 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUE TO TRAIN ACROSS WESTERN ORANGE COUNTY ESPECIALLY IN THE VICINTY OF PORT JERVIS. HEAVY CONTINUOUS RAINS OVER THE PAST THREE TO FOUR HOURS WILL CAUSE SMALL RIVERS AND STREAMS TO OVERTOP THEIR BANKS. * DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! MOVE TO HIGHER TERRAIN IMMEDIATEvLY IF YOU SEE FLOODING OCCURRING. MCKILLOP
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 31, 6:13 PM EDT, 4 hours 24 minutes before
NYZ067>081-NJZ002>006-011-CTZ005>012-010400- SPECIAL WEATHER STATEMENT - EVENING SEVERE WEATHER POTENTIAL NATIONAL WEATHER SERVICE NEW YORK NY 613 PM EDT SUN MAY 31 1998 ...ROUGH AND TUMBLE WEATHER IN THE FORM OF SEVERE THUNDERSTORMS IS HEADED FOR THE TRI-STATE REGION... ...A TORNADO WATCH HAS BEEN ISSUED FOR THE ENTIRE TRI-STATE REGION AND IS IN EFFECT UNTIL 1000 PM... A VERY STRONG STORM SYSTEM MOVING INTO SOUTHEASTERN CANADA WILL BRING SOME VERY INTENSE WEATHER TO THE TRI-STATE REGION LATER THIS EVENING. SEVERE THUNDERSTORMS HAVE BEEN MOVING ACROSS PORTIONS OF UPSTATE NEW YORK THROUGHOUT THE AFTERNOON HOURS...AND SEVERE THUNDERSTORMS ARE CURRENTLY DEVELOPING ACROSS CENTRAL AND EASTERN PENNSYLVANIA. THE ATMOSPHERE HAS BECOME VERY UNSTABLE ACROSS OUR REGION AS WELL... AND SEVERE WEATHER IS POSSIBLE LATER THIS EVENING. ANY SEVERE THUNDERSTORMS THAT DO DEVELOP MAY PRODUCE WIND GUSTS WELL OVER 60 MPH WHICH MAY DOWN TREES AND POWER LINES...LARGE HAIL. CONDITIONS ARE FAVORABLE FOR ISOLATED TORNADOES AS WELL. CURRENT PROJECTIONS INDICATE THAT THUNDERSTORMS WILL BEGIN TO ARRIVE IN THE LOWER HUDSON VALLEY AROUND 730 PM...NORTHEAST NEW JERSEY BY ABOUT 830 PM...AND SOUTHERN CONNECTICUT...NEW YORK CITY AND LONG ISLAND WELL AFTER SUNSET. ANYONE WITH OUTDOOR PLANS FOR THIS EVENING SHOULD KEEP A WATCHFUL EYE TO THE SKY. IF THREATENING WEATHER APPROACHES...BE PREPARED TO SEEK SAFE SHELTER. STAY TUNED TO NOAA WEATHER RADIO OR OTHER MEDIA OUTLETS FOR THE LATEST SHORT TERM FORECASTS AND POSSIBLE WARNINGS. REYNOLDS / NWSFO BROOKHAVEN NY
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 8:17 PM EDT | Tornado Warning | OKX | Orange | 38 min |
| May 31, 8:33 PM EDT | Severe Thunderstorm Warning | OKX | Putnam | 57 min |
| May 31, 8:47 PM EDT | Tornado Warning | OKX | Orange | 58 min |
| May 31, 9:05 PM EDT | Tornado Warning | OKX | Westchester | 65 min |
| May 31, 9:56 PM EDT | Tornado Warning | OKX | Orange, Putnam | 59 min |
| May 31, 9:56 PM EDT | Tornado Warning | OKX | Rockland | 59 min |
| May 31, 10:10 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 60 min |
| May 31, 10:47 PM EDT | Severe Thunderstorm Warning | OKX | Rockland | 48 min |
| May 31, 10:47 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 48 min |
| Jun 1, 2:03 AM EDT | Severe Thunderstorm Warning | OKX | Kings, Queens | 47 min |
| Jun 1, 2:33 AM EDT | Severe Thunderstorm Warning | OKX | Nassau, Suffolk | 47 min |
Nearby
Flash Flood Warnings in New York, 1998Every flash flood warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.