Alert archive / Connecticut / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 67, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Jul 17, 2009, 11:15 PM EDT for Greater Bridgeport Planning Region, Connecticut. It was in force for 24 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
- Jul 17, 2009, 11:15 PM EDT (03:15 UTC)
- Expired
- Jul 17, 2009, 11:39 PM EDT
- In force
- 24 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
The radar
The Brookhaven radar (KOKX), 52 km from the middle of the area, began a volume at 03:16 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, 3.3 hours before the alert went out and 52 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
- 1160 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
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 New York, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 7:27 PM EDT, 3 hours 48 minutes earlier.
Area forecast discussion, Jul 17, 7:27 PM EDT, 3 hours 48 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW YORK NY 727 PM EDT FRI JUL 17 2009 .SYNOPSIS... LOW PRESSURE WILL PASS OVER THE WESTERN SECTION OF THE TRI STATE REGION OVERNIGHT. THIS SETS THE STAGE FOR A DRY WEEKEND WITH TYPICAL MID SUMMER TEMPERATURES AS A FRONTAL BOUNDARY BECOMES INACTIVE OFF THE COAST. THE FRONT IS EXPECTED TO BECOME ACTIVE AGAIN ON MONDAY INTO AT LEAST THE MIDDLE OF NEXT WEEK RESULTING IN A RETURN TO UNSETTLED WEATHER. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... SHORT RANGE MODELS IN FAIR AGREEMENT. GFS AND REGIONAL GEM APPEAR TO HAVE GOOD HANDLE ON THE SITUATION AND BASIS FOR THE FCST. LARGE SYNOPTIC SCALE LOW SCALE MOVES INTO CHAMPLAIN VALLEY BY AM. HEAVY RAIN OVERNIGHT IS LIKELY THE MAIN THREAT AND WILL MENTION THIS IN THE HWO...THOUGH DO NOT BELIEVE QPF IS OVER AN INCH ON AVERAGE. SEVERE HAIL/WIND THREAT WILL LIKELY DIMINISH BY SUNSET. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/... COLD FRONT PASSES EAST OF THE REGION BY SATURDAY MORNING WITH ONLY A LOW CHANCE NORTH FOR ANY LEFT OVER PCPN IN THE EARLY MORNING. WHILE THERES A LEFT OVER SURFACE TROUGH OVER THE REGION...DONT FORESEE MUCH MORE THAN A FEW CONVECTIVE CU. TEMPS ARE A BLEND OF NAM AND COOLER GFS MOS. LESS HUMIDITY AND TAD COOLER FOR SUNDAY. OVERALL...LOOKS LIKE A GREAT MID-SUMMER WEEKEND. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... FORECAST MODELS ARE SHOWING A POTENTIAL FOR AN EXTENDED PERIOD OF UNSETTLED WEATHER DURING THIS TIME. SYN OPTICALLY...AN UPPER LEVEL TROUGH OF LOW PRESSURE IS FORECAST TO GRADUALLY DEEPEN EXTENDING S ACROSS THE WESTERN ATLANTIC TROPICAL WATERS. A BOUNDARY OR FRONT IS FORECAST TO REMAIN NEARLY STATIONARY JUST OFF THE NJ AND LONG ISLAND COAST AS SMALL WAVES OF LOW PRESSURE RIPPLE N TO NE ALONG THIS FRONT BRINGING ROUNDS OF HEAVY SHOWERS AND TSTMS IN A MARITIME TROPICAL AIR MASS. && .AVIATION /00Z SATURDAY THROUGH WEDNESDAY/... LOW PRESSURE APPROACHING FROM THE WEST...AND BOUNDARY LAYER WIND FLOW BACKING TO THE EAST/SOUTHEAST. MOIST BOUNDARY LAYER WITH SHRINKING T/TD SPREADS SETTING THE STAGE FOR STRATUS AND FOG DEVELOPMENT. IN ADDITION...WILL NEED TO KEEP AN EYE ON ANY UPSTREAM CONVECTION. LIKELY IFR CONDITIONS OVERNIGHT MOST TERMINALS. COLD FRONT THEN PASSES TO THE EAST AND FLOW TURNS TO THE SOUTHWEST...THEN WEST/NORTHWEST SATURDAY MORNING. ANY LOW CLOUDS SCOUR OUT AS BOUNDARY LAYER DRIES...AND VFR CONDITIONS PREVAIL THROUGH THE DAY. OUTLOOK FOR 00Z SUN THROUGH WED... SLOW MOVING UPPER LEVEL LOW WILL SPIN OVER THE GREAT LAKES THROUGH MON...THEN OPEN UP AS IT EXITS. MAINLY VFR BUT PERIODS OF SUB- VFR ARE POSSIBLE IN SHOWERS/TSTMS FOR QUITE SOME TIME. && .MARINE... OTHER THAN TSTMS TONIGHT...EXPECT RELATIVELY TRANQUIL WX THIS WEEKEND. SEAS ON OCEAN MAY APPROACH 5 FT SATURDAY AFTERNOON...BUT FOR NOW HAVE FORECAST BELOW WAVEWATCH MODEL GUIDANCE AND NO SMALL CRAFT FOR SEAS. LESS WIND AND SEAS ON SUNDAY. STATIONARY FRONT BECOMES ACTIVE NEXT WEEK...BUT STILL BELOW SCA LEVEL CONDITIONS EXPECTED. && .HYDROLOGY... QPF OVERNIGHT IS EXPECTED TO BE FOCUSED ON THE WESTERN THIRD OF THE HYDROLOGIC SERVICE AREA. BASIN AVERAGES HERE SHOULD BE NEAR AN INCH WITH LOCALLY HIGHER AMOUNTS (2 INCHES) IN EMBEDDED CONVECTION. THERE IS A POSSIBILITY OF LOCALIZED FLASH FLOODING WITH THE CONVECTION...BUT TOO LOW A CHANCE AND LOCALIZED TO WARRANT A FLOOD WATCH. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...NONE. NY...NONE. NJ...NONE. MARINE...NONE. && SYNOPSIS...JST NEAR TERM...JST SHORT TERM...JST LONG TERM...GC AVIATION...PW MARINE...GC/JST HYDROLOGY...JST
Hazardous weather outlook, Jul 17, 4:39 PM EDT, 6 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NEW YORK NY 439 PM EDT FRI JUL 17 2009 NJZ002>006-011-NYZ067>076-181000- WESTERN PASSAIC-BERGEN-EASTERN PASSAIC-ESSEX-HUDSON-UNION-ORANGE- PUTNAM-ROCKLAND-NORTHERN WESTCHESTER-SOUTHERN WESTCHESTER- NEW YORK (MANHATTAN)-BRONX-RICHMOND (STATEN ISLAND)-KINGS (BROOKLYN)- QUEENS- 439 PM EDT FRI JUL 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST NEW JERSEY AND SOUTHEAST NEW YORK. .DAY ONE...TONIGHT. RAIN WITH EMBEDDED THUNDERSTORMS LATE THIS EVENING INTO THE OVERNIGHT COULD RESULT IN LOCALIZED FLOODING FROM EXCESSIVE RAINFALL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA. ANZ330-335-338-340-345-350-353-355-181000- LONG ISLAND SOUND EAST OF NEW HAVEN CT/PORT JEFFERSON NY- LONG ISLAND SOUND WEST OF NEW HAVEN CT/PORT JEFFERSON NY- NEW YORK HARBOR-PECONIC AND GARDINERS BAYS- SOUTH SHORE BAYS FROM JONES INLET THROUGH SHINNECOCK BAY- MORICHES INLET NY TO MONTAUK POINT NY OUT 20 NM- FIRE ISLAND INLET NY TO MORICHES INLET NY OUT 20 NM- SANDY HOOK NJ TO FIRE ISLAND INLET NY OUT 20 NM- 439 PM EDT FRI JUL 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA. CTZ005>007-009-181000- NORTHERN FAIRFIELD-NORTHERN NEW HAVEN-NORTHERN MIDDLESEX- SOUTHERN FAIRFIELD- 439 PM EDT FRI JUL 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN CONNECTICUT. .DAY ONE...TONIGHT. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS EARLY THIS EVENING. LARGE HAIL...DAMAGING WINDS AND HEAVY RAIN ARE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA. CTZ008-010>012-NYZ077>081-181000- NORTHERN NEW LONDON-SOUTHERN NEW HAVEN-SOUTHERN MIDDLESEX- SOUTHERN NEW LONDON-NASSAU-NORTHWESTERN SUFFOLK-NORTHEASTERN SUFFOLK- SOUTHWESTERN SUFFOLK-SOUTHEASTERN SUFFOLK- 439 PM EDT FRI JUL 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN CONNECTICUT AND SOUTHEAST NEW YORK. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA. JST
In the hours before
Special weather statement, Jul 17, 9:35 PM EDT, 1 hour 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW YORK NY 935 PM EDT FRI JUL 17 2009 NJZ002>005-NYZ067>070-180230- BERGEN-EASTERN PASSAIC-ESSEX-NORTHERN WESTCHESTER-ORANGE-PUTNAM-ROCKLAND-WESTERN PASSAIC- 935 PM EDT FRI JUL 17 2009 ...STRONG THUNDERSTORMS WILL IMPACT NORTHERN ESSEX...NORTHWESTERN BERGEN...ORANGE...PASSAIC...PUTNAM...ROCKLAND AND WESTCHESTER COUNTIES... AT 933 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM HOPATCONG TO BOONTON TO CALDWELL. FREQUENT CLOUD TO GROUND LIGHTNING...SMALL HAIL...AND GUSTY WINDS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER IMMEDIATELY. SMITH
Local storm report, Jul 17, 9:58 PM EDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
958 PM EDT FRI JUL 17 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0953 PM HAIL OAKLAND 41.03N 74.24W
07/17/2009 E1.00 INCH BERGEN NJ TRAINED SPOTTER
&&
BCSpecial weather statement, Jul 17, 10:12 PM EDT, 1 hour 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW YORK NY 1012 PM EDT FRI JUL 17 2009 CTZ009-NJZ003-006-NYZ070>073-076-077-180315- BERGEN-BRONX-HUDSON-NASSAU-NEW YORK (MANHATTAN)-NORTHERN WESTCHESTER-QUEENS-SOUTHERN FAIRFIELD-SOUTHERN WESTCHESTER- 1012 PM EDT FRI JUL 17 2009 ...STRONG THUNDERSTORM WILL IMPACT BRONX...FAIRFIELD...HUDSON...NEW YORK (MANHATTAN)...NORTHWESTERN NASSAU...QUEENS...SOUTHEASTERN BERGEN AND WESTCHESTER COUNTIES... AT 1009 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR LONG ISLAND CITY...OR NEAR MIDTOWN MANHATTAN...AND MOVING NORTHEAST AT 25 MPH. FREQUENT CLOUD TO GROUND LIGHTNING...SMALL HAIL...AND GUSTY WINDS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. IN ADDITION...VERY HEAVY RAIN...WITH RAINFALL RATES OF UP TO ONE INCH PER HOUR IS OCCURRING WITH THIS STORM. THIS COULD CAUSE PONDING OF WATER ON ROADWAYS... AND MINOR FLOODING OF POOR DRAINAGE AREAS. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER IMMEDIATELY. PW
Local storm report, Jul 17, 10:18 PM EDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
1018 PM EDT FRI JUL 17 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1006 PM TSTM WND DMG RAMSEY 41.06N 74.15W
07/17/2009 BERGEN NJ TRAINED SPOTTER
WIRES DOWN AND ON FIRE AT NORTH CENTRAL AVE AND PARK.
&&
BCLocal storm report, Jul 17, 10:46 PM EDT, 29 minutes before
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</html>Local storm report, Jul 17, 10:58 PM EDT, 17 minutes before
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</html>The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 9:31 PM EDT | Areal Flood Advisory | OKX | Orange, Putnam, Rockland, Westchester | 89 min |
| Jul 17, 9:44 PM EDT | Severe Thunderstorm Warning | OKX | Orange, Rockland, Westchester | 46 min |
| Jul 17, 10:10 PM EDT | Severe Thunderstorm Warning | OKX | Orange, Putnam, Rockland, Westchester | 50 min |
| Jul 17, 10:43 PM EDT | Flash Flood Warning | OKX | Orange, Putnam, Rockland, Westchester | 102 min |
| Jul 17, 11:01 PM EDT | Severe Thunderstorm Warning | OKX | Putnam, Westchester | 44 min |
| Jul 18, 3:58 AM EDT | Small Craft Advisory for Hazardous Seas | OKX | 7 hr |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2009Every severe thunderstorm warning in 2009
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.