Alert archive / New York / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 101, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Sep 27, 1994, 7:30 AM EDT for Nassau County, New York. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Sep 27, 1994, 7:30 AM EDT (11:30 UTC)
- Expired
- Sep 27, 1994, 8:30 AM EDT
- In force
- 60 min
- Issued by
- NWS New York, NY
- Area
- Whole counties
County Nassau County, NY
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 11.5 hours before the alert went out and 62 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
- 941 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, Sep 27, 4:00 AM EDT, 3 hours 30 minutes before
NYZ067>081-NJZ001>014-271500- SPECIAL WEATHER STATEMENT - HEAVY DOWNPOURS/STRONG THUNDERSTORMS AND WEATHER MAP DISCUSSION FOR EXTREME SOUTHEASTERN NEW YORK NORTHERN NEW JERSEY AND LONG ISLAND NATIONAL WEATHER SERVICE NEW YORK NY 400 AM EDT TUE SEP 27 1994 A COMPLEX FRONTAL SYSTEM AFFECTING THE NORTHEASTERN U.S. AND SOUTHWARD ALONG THE EASTERN SEABOARD TODAY WILL GIVE US CLOUDS AND A LIKELIHOOD OF SHOWERS AND THUNDERSTORMS. WITH HIGH MOISTURE AND MODERATE INSTABILITY IN THE ATMOSPHERE...SOME OF THESE SHOWERS COULD PRODUCE HEAVY DOWNPOURS WHICH WILL CAUSE LOCALIZED ROAD AND HIGHWAY FLOODING. ALSO...SOME THUNDERSTORMS COULD BE QUITE STRONG. THE CULPRIT IS A PAIR OF FRONTS. THE FIRST ONE EXTENDS FROM LOW PRESSURE IN MICHIGAN AND CURVES THROUGH THE EASTERN GREAT LAKES AND DOWN ALONG THE APPALACHIANS. THIS FRONT WILL HAVE TROUBLE MOVING EASTWARD TO THE COAST TODAY AND TONIGHT. A WARM FRONT ATTACHED TO THE FIRST FRONT WILL SWING NORTHWARD THROUGH OUR REGION THIS AFTERNOON. AROUND SUNRISE THIS TUESDAY MORNING MOST SHOWERS AND THUNDERSTORMS WERE FROM NEW YORK CITY WESTWARD. FOR THIS MORNING AT LEAST...IT APPEARS THAT RAIN CHANCES WILL BE CONSIDERABLY HIGHER FROM THE CITY WEST...WITH SMALLER CHANCES OVER EASTERN LONG ISLAND. AND...SOME OF THESE STORMS MOVING NORTHWARD THROUGH THE DELAWARE VALLEY WILL HAVE THE POTENTIAL TO DROP A LOT OF RAIN IN A SHORT TIME AND PRODUCE STRONG WIND GUSTS AS WELL. MOTORISTS WILL NEED TO USE EXTRA CARE DURING THE MORNING COMMUTE...ESPECIALLY OVER NEW JERSEY AND INTERIOR SOUTHEAST NEW YORK. SHOWERS SHOULD BECOME LESS NUMEROUS THIS AFTERNOON...BUT A CHANCE WILL CONTINUE FOR ALL SECTIONS. WE MIGHT SEE A FEW PEEKS OF SUN LATER TODAY AFTER THE WARM FRONT SWINGS BY. FOR NOW WE WILL JUST MENTION VARYING AMOUNTS OF CLOUDS FOR TONIGHT AND WEDNESDAY UNTIL LATER GUIDANCE INDICATES THE NEED TO RETURN RAIN CHANCES TO THE FORECAST. AT THIS POINT THE MAIN FRONT WELL TO OUR WEST IN THE WESTERN OHIO VALLEY IS NOT SLATED TO MOVE PAST THE COAST TIL LATE THIS WEEK.
Special weather statement, Sep 27, 4:01 AM EDT, 3 hours 29 minutes before
NYZ067>081-NJZ001>014-271500- SPECIAL WEATHER STATEMENT - HEAVY DOWNPOURS/STRONG THUNDERSTORMS AND WEATHER MAP DISCUSSION FOR EXTREME SOUTHEASTERN NEW YORK NORTHERN NEW JERSEY AND LONG ISLAND NATIONAL WEATHER SERVICE NEW YORK NY 400 AM EDT TUE SEP 27 1994 A COMPLEX FRONTAL SYSTEM AFFECTING THE NORTHEASTERN U.S. AND SOUTHWARD ALONG THE EASTERN SEABOARD TODAY WILL GIVE US CLOUDS AND A LIKELIHOOD OF SHOWERS AND THUNDERSTORMS. WITH HIGH MOISTURE AND MODERATE INSTABILITY IN THE ATMOSPHERE...SOME OF THESE SHOWERS COULD PRODUCE HEAVY DOWNPOURS WHICH WILL CAUSE LOCALIZED ROAD AND HIGHWAY FLOODING. ALSO...SOME THUNDERSTORMS COULD BE QUITE STRONG. THE CULPRIT IS A PAIR OF FRONTS. THE FIRST ONE EXTENDS FROM LOW PRESSURE IN MICHIGAN AND CURVES THROUGH THE EASTERN GREAT LAKES AND DOWN ALONG THE APPALACHIANS. THIS FRONT WILL HAVE TROUBLE MOVING EASTWARD TO THE COAST TODAY AND TONIGHT. A WARM FRONT ATTACHED TO THE FIRST FRONT WILL SWING NORTHWARD THROUGH OUR REGION THIS AFTERNOON. AROUND SUNRISE THIS TUESDAY MORNING MOST SHOWERS AND THUNDERSTORMS WERE FROM NEW YORK CITY WESTWARD. FOR THIS MORNING AT LEAST...IT APPEARS THAT RAIN CHANCES WILL BE CONSIDERABLY HIGHER FROM THE CITY WEST...WITH SMALLER CHANCES OVER EASTERN LONG ISLAND. AND...SOME OF THESE STORMS MOVING NORTHWARD THROUGH THE DELAWARE VALLEY WILL HAVE THE POTENTIAL TO DROP A LOT OF RAIN IN A SHORT TIME AND PRODUCE STRONG WIND GUSTS AS WELL. MOTORISTS WILL NEED TO USE EXTRA CARE DURING THE MORNING COMMUTE...ESPECIALLY OVER NEW JERSEY AND INTERIOR SOUTHEAST NEW YORK. SHOWERS SHOULD BECOME LESS NUMEROUS THIS AFTERNOON...BUT A CHANCE WILL CONTINUE FOR ALL SECTIONS. WE MIGHT SEE A FEW PEEKS OF SUN LATER TODAY AFTER THE WARM FRONT SWINGS BY. FOR NOW WE WILL JUST MENTION VARYING AMOUNTS OF CLOUDS FOR TONIGHT AND WEDNESDAY UNTIL LATER GUIDANCE INDICATES THE NEED TO RETURN RAIN CHANCES TO THE FORECAST. AT THIS POINT THE MAIN FRONT WELL TO OUR WEST IN THE WESTERN OHIO VALLEY IS NOT SLATED TO MOVE PAST THE COAST TIL LATE THIS WEEK.
Special weather statement, Sep 27, 5:40 AM EDT, 1 hour 50 minutes before
NYZ067>081-NJZ002>006-011-CTZ005>012-271400- SPECIAL WEATHER STATEMENT AND SHORT TERM FORECAST NATIONAL WEATHER SERVICE NEW YORK NY 540 AM EDT TUE SEP 27 1994 NUMEROUS SHOWERS AND THUNDERSTORMS WERE ROLLING NORTHWARD OVER NEW JERSEY AND SOUTHEASTERN NEW YORK EARLY THIS MORNING. THE HEAVIEST STORMS BEFORE SUNRISE MOVED THROUGH THE DELAWARE VALLEY...BUT MORE STORMS WERE FORMING OVER SOUTHERN NEW JERSEY AND WERE HEADING FOR THE NEW YORK CITY METROPOLITAN AREA AT 520 AM. LESS SHOWER OR THUNDERSTORM ACTIVITY IS ANTICIPATED BETWEEN 530 AND 8 AM OVER EASTERN LONG ISLAND AND SOUTHEASTERN CONNECTICUT. SOME OF THE SHOWERS AND STORMS WILL DUMP HEAVY RAIN IN A SHORT TIME AND IN LOCALIZED AREAS...AND MAY REPEAT OVER SOME AREAS IN A TRAIN EFFECT. THIS WILL CAUSE SPOTTY ROAD HIGHWAY AND URBAN FLOODING THIS MORNING MAINLY FROM EXTREME SOUTHWESTERN CONNECTICUT AND THE NEW YORK METRO AREA AND POINTS WESTWARD...AT LEAST THROUGH 9 OR 10 AM. ALSO...SOME OF THESE THUNDERSTORMS COULD CAUSE STRONG AND DAMAGING WINDS AS WELL AS DANGEROUS LIGHTNING AND SOME HAIL. FOR SAFETY/S SAKE...DO NOT DRIVE INTO AREAS WHICH ARE FLOODED. AT BEST YOU COULD STALL OUT...AND AT WORST YOU COULD SUSTAIN INJURY OR WORSE. AND GET INSIDE A STURDY BUILDING WHEN THUNDERSTORMS APPROACH YOUR LOCATION. TEMPERATURES WILL REMAIN IN THE 60S THIS MORNING...AND WINDS WILL BLOW FROM THE EASTSOUTHEAST AT 10 TO 15 MILES AN HOUR...EXCEPT VARIABLE WITH POSSIBLY STRONG GUSTS NEAR THUNDERSTORMS.
Special weather statement, Sep 27, 7:20 AM EDT, 10 minutes before
NYZ067>081-NJZ002>006-011-CTZ005>012-271500- SPECIAL WEATHER STATEMENT AND SHORT TERM FORECAST NATIONAL WEATHER SERVICE NEW YORK NY 720 AM EDT TUE SEP 27 1994 AT 715 AM NUMEROUS SHOWERS AND THUNDERSTORMS WERE ROLLING NORTHWARD OVER NORTHEASTERN NEW JERSEY SOUTHEASTERN NEW YORK AND SOUTHWESTERN CONNECTICUT EARLY THIS MORNING. THE HEAVIEST STORMS AT 7 AM WERE MOVING THROUGH ORANGE COUNTY NEW YORK AND OVER EASTERN QUEENS IN NEW YORK CITY AS WELL AS NASSAU COUNTY ON WESTERN LONG ISLAND. MARINERS SHOULD WATCH FOR STRONG WIND GUSTS HIGHER SEAS AND DANGEROUS LIGHTNING NEAR THE SOUTH SHORE OF WESTERN LONG ISLAND AND OVER LOWER NEW YORK HARBOR AND EASTERN RARITAN BAY UNTIL THESE STORMS PASS THROUGH BY 745 OR 8 AM. SOME OF THE SHOWERS AND STORMS WILL DUMP HEAVY RAIN IN A SHORT TIME ...AND MAY REPEAT OVER SOME AREAS IN A TRAIN EFFECT. THIS WILL CAUSE SPOTTY ROAD HIGHWAY AND URBAN FLOODING THIS MORNING. SO FAR WITH THESE STORMS EARLY THIS MORNING...RADAR ESTIMATED A LITTLE OVER 3 INCHES NEAR RED BANK IN MONMOUTH COUNTY NEW JERSEY... WITH 1/2 TO 1 INCH ESTIMATED OVER PARTS OF ORANGE COUNTY NEW YORK. THESE ESTIMATES MAY OR MAY NOT BE RELIABLE HOWEVER...BUT THEY DO SHOW WHERE THE HEAVIEST STORMS HAVE TRACKED. FOR SAFETY/S SAKE...DO NOT DRIVE INTO AREAS WHICH ARE FLOODED. AT BEST YOU COULD STALL OUT...AND AT WORST YOU COULD SUSTAIN INJURY OR WORSE. AND GET INSIDE A STURDY BUILDING WHEN THUNDERSTORMS APPROACH YOUR LOCATION. TEMPERATURES WILL REMAIN IN THE 60S THIS MORNING...AND WINDS WILL BLOW FROM THE EASTSOUTHEAST AT 10 TO 15 MILES AN HOUR...EXCEPT VARIABLE WITH POSSIBLY STRONG GUSTS NEAR THUNDERSTORMS.
The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 8:23 AM EDT | Flash Flood Warning | OKX | Greater Bridgeport Planning Region | 67 min |
| Sep 27, 8:23 AM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 67 min |
| Sep 27, 8:56 AM EDT | Flash Flood Warning | OKX | Naugatuck Valley Planning Region | 64 min |
| Sep 27, 8:56 AM EDT | Severe Thunderstorm Warning | OKX | Naugatuck Valley Planning Region | 64 min |
Nearby
Severe Thunderstorm Warnings in New York, 1994Every severe thunderstorm warning in 1994
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.