Alert archive / Vermont / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 22, NWS Albany, NY

June 20, 2001Windham County, Vermont

NWS Albany, NY issued this severe thunderstorm warning at Jun 20, 2001, 5:17 PM EDT for Windham County, Vermont. It was in force for 58 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: Jun 20, 2001, 5:17 PM EDT (21:17 UTC)
Expired: Jun 20, 2001, 6:15 PM EDT
In force: 58 min
Issued by: NWS Albany, NY
Area: Whole counties

County Windham County, VT

The radar

The Albany radar (KENX), 119 km from the middle of the area, began a volume at 21:18 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
Jun 20, 5:30 PM EDT	Hail 0.88	Grafton, VT

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 20, 2:30 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.3 hours before the alert went out and 97 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 226 J/kg
Mixed-layer CIN: -207 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KALY 202117 RRA
SVRALY
VTC025-202215-

BULLETIN - EAS ACTIVATION REQUIRED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ALBANY NY
517 PM EDT WED JUN 20 2001

THE NATIONAL WEATHER SERVICE IN ALBANY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN WINDHAM COUNTY IN SOUTHERN VERMONT

* UNTIL 615 PM EDT

* AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR GRAFTON...OR ABOUT 8 MILES NORTH OF
  TOWNSHEND...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAXTONS RIVER AT 520 PM EDT
  ROCKINGHAM AT 525 PM EDT
  BELLOWS FALLS AT 530 PM EDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND VERY HEAVY
RAIN. PEOPLE OUTSIDE SHOULD MOVE TO A SUBSTANTIAL SHELTER NOW.

$$

LAT...LON 4325 7268 4307 7272 4303 7247 4323 7245

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 Jun 20, 2:45 PM EDT, 2 hours 32 minutes earlier.

Area forecast discussion, Jun 20, 2:45 PM EDT, 2 hours 32 minutes before

AREA FORECAST DISCUSSION...
NATIONAL WEATHER SERVICE ALBANY NY
245 PM EDT WED JUN 20 2001

DISC...MAIN WEATHER PROBLEM FOR ERN NY AND WERN NEW ENGLAND LATE
THIS AFTERNOON THROUGH FRIDAY WILL BE STRONG CONVECTION FIRING AHEAD
OF IMPULSES OF LOW PRESSURE MOVING ALONG A COLD FRONT THAT WILL
BECOME QUASI-STATIONARY ACROSS THE NORTHEAST FOR THE NEXT FEW DAYS.

.LARGE SCALE OVERVIEW...
12Z RAOB ANALYSIS REVEALS A PERSISTENT RIDGE AT 500 HPA OVER
THE EASTERN PACIFIC AND WEST COAST OF THE LOWER 48. A MID-LEVEL
TROUGH CONTINUES TO EXPAND AND DIG EAST OF THE ROCKIES ACROSS THE
NORTHERN PLAINS (AS FAR SOUTH AS KTOP AND KIND) AND THE UPPER
MIDWEST EASTWARD TO THE NORTHEAST. AN INTENSE UPPER LEVEL JET AT 250
HPA EXCEEDING 100 KNOTS...WILL CONTINUE TO PROPAGATE E/NE ACROSS
SOUTHERN MN AND WI...AS WELL AS NERN MI THIS AFTERNOON. DOWNSTREAM
OF KALY IN THE NORTHEAST A WEAK RIDGE OVER THE WESTERN ATLANTIC WILL
BLOCK THE CURRENT COLD FRONT FROM SWEEPING ACROSS NY AND NEW ENGLAND
FOR THE NEXT FEW DAYS.

.SHORT TERM...
THE LAST FULL DAY OF SPRING DEFINITELY HAS A CHANCE OF GENERATING
SOME SEVERE WEATHER THIS PM AND EARLY THIS EVENING ACROSS KALYS CWA.
AS OF 1630Z...IMPRESSIVE CELLS ARE STARTING TO FIRE IN CENTRAL PA.
ANTICIPATE THIS IS ASSOCIATED WITH THE FRONT AND A SHORTWAVE MOVING
THROUGH WERN PA.

A SURFACE COLD FRONT IS CURRENTLY SITUATED FROM KMPV TO KGFL TO KIPT
AT 1700Z. THIS FRONT WILL SLOW DOWN AND STALL ACROSS THE NORTHEAST
LATE THIS AFTERNOON AND INTO TOMORROW. MAJORITY OF THE ACTIVITY HAS
BEEN BEHIND THE SFC FRONT. NOT A CLASSIC SPRING/SUMMER
KATAFRONT...MORE OR LESS ANAFRONTAL. CAPES FROM KALY SOUTH AND EAST
ARE RANGING FROM 1500 J/KG TO 2500 J/KG. LIS ARE FROM 0 TO -5 AND
DEWPOINTS FROM THE CAPITAL DISTRICT SOUTH AND EAST ARE IN THE MID TO
UPPER 60S. A THETA E RIDGE IS IN PLACE OVER THE HUDSON VALLEY
ACCORDING TO THE ETA MODEL WITH VALUES OF 340 TO 345K. THIS
CONTRASTS VALUES IN THE LOW 320S IN WERN NY. LOW LEVEL WIND FIELDS
NOT TOO IMPRESSIVE...THOUGH SOUTHEASTERN NY IS SITTING IN THE
ANTICYLONIC ENTRANCE REGION OF THE MID-LEVEL JET...CONDUCIVE TO
CONVECTIVE DEVELOPMENT. LIFT...MOISTURE...INSTABILITY IN PLACE SO
SCATTERED SEVERE TSTMS ARE POSSIBLE. SPC AGREES ISSUING A SVR TSTM
WATCH AS I TYPE AT 1650Z. SVR TSTM BOX COVERS MOHAWK VALLEY
(INCLUDING KALY)SOUTH TO THE VT/MA/CT BORDER EXCLUDING NYCS CWA
TILL 22Z.

THE FRONT WILL MAKE IT AS FAR SOUTH AS SOUTHERN NEW ENGLAND  AND NYC
OVERNIGHT. ETA/NGM/AVN ARE IN GENERAL AGREEMENT THU...EXCEPT THE AVN
DRAGS THE FRONT THE FURTHEST SOUTH AND PRODUCES POPS IN THE 30S
ACROSS MUCH OF THE CWA. ALL AND ALL...SHOWERS AND THUNDERSTORMS ARE
A GOOD BET TOMORROW FROM KALY SOUTH AND EAST. WILL GO SCATTERED
SHWRS/TSTMS NORTH AND WEST. AN AREA OF LOW PRESSURE WILL BEGIN TO
FORM OVER THE MIDWEST IL/IN BORDER AND TRACK THROUGH THE OHIO VALLEY
THURSDAY NIGHT. COLD FRONT WILL COME BACK AS WARM FRONT WITH THE LOW
THU NIGHT INTO FRIDAY. ON AND OFF SHOWERS AND THUNDERSTORMS WILL BE
POSSIBLE. WILL GO WITH LIKELY POPS FOR THOSE PERIODS. WILL LEAN
TOWARD THE MAV NUMBERS FOR ALL TEMPERATURES.

.EXTENDED...
THE MRF HINTS AT A RIDGE BUILDING IN NICELY OVER THE NORTHEAST FOR
THE LATTER HALF OF THE WEEKEND. IT APPEARS WE GO TO MORE OF A DRYING
TREND AFTER  2-3 DAYS OF UNSETTLED WEATHER. TEMPS WILL REBOUND TO
THE MID TO UPPERS 80S FOR MON THROUGH WED. HOWEVER THE 12Z AVN HANGS
ONTO TO THE UPPER LEVEL LOW AND CUTS IT OFF OVER OH/PA SUNDAY INTO
MONDAY. WILL STILL MENTION THE CHANCE OF A SHOWER OR THUNDERSTORM
SUNDAY ACROSS THE CWA SUNDAY. OVERALL...AT THIS POINT IN TIME
WILL LEAVE MONDAY DRY.

ALY...
SVR TSTM WATCH TILL 22Z
NYC001-021-035-039-057-083-091-093-095-

SVR TSTM WATCH TILL 01Z
VTC003-025-027-

WASULA

In the hours before

Local storm report, Jun 20, 4:11 PM EDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
411 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0251 PM    GREENVILLE                NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0308 PM    COXSACKIE                 NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0325 PM    COXSACKIE                 NY   1.75 INCH HAIL
06/20/01   GREENE                         GOLF BALL SIZE HAIL

0335 PM    STOCKPORT                 NY   1.75 INCH HAIL
06/20/01   COLUMBIA                       1.5 INCH TO 2 INCH SIZE
                                          HAIL

0345 PM    CAIRO                     NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0346 PM    CATSKILL                  NY   1.5 INCH HAIL
06/20/01   GREENE                         PING PONG BALL SIZE HAIL

0355 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL
 g

NNNN
KOLECI

Local storm report, Jun 20, 4:17 PM EDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
417 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0251 PM    GREENVILLE                NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0308 PM    COXSACKIE                 NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0325 PM    COXSACKIE                 NY   1.75 INCH HAIL
06/20/01   GREENE                         GOLF BALL SIZE HAIL

0335 PM    STOCKPORT                 NY   1.75 INCH HAIL
06/20/01   COLUMBIA                       1.5 INCH TO 2 INCH SIZE
                                          HAIL

0345 PM    CAIRO                     NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0346 PM    CATSKILL                  NY   1.5 INCH HAIL
06/20/01   GREENE                         PING PONG BALL SIZE HAIL

0355 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0412 PM    CLAVERACK                 NY   1 INCH HAIL
06/20/01   COLUMBIA                       QUARTER SIZE HAIL

NNNN
KOLECI

Local storm report, Jun 20, 4:26 PM EDT, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
426 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0251 PM    GREENVILLE                NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0308 PM    COXSACKIE                 NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0325 PM    COXSACKIE                 NY   1.75 INCH HAIL
06/20/01   GREENE                         GOLF BALL SIZE HAIL

0335 PM    STOCKPORT                 NY   1.75 INCH HAIL
06/20/01   COLUMBIA                       1.5 INCH TO 2 INCH SIZE
                                          HAIL

0345 PM    CAIRO                     NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0346 PM    CATSKILL                  NY   1.5 INCH HAIL
06/20/01   GREENE                         PING PONG BALL SIZE HAIL

0355 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0412 PM    CLAVERACK                 NY   1 INCH HAIL
06/20/01   COLUMBIA                       QUARTER SIZE HAIL

0418 PM    CATSKILL                  NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

NNNN
KOLECI

Local storm report, Jun 20, 4:31 PM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
431 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0251 PM    GREENVILLE                NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0308 PM    COXSACKIE                 NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0325 PM    COXSACKIE                 NY   1.75 INCH HAIL
06/20/01   GREENE                         GOLF BALL SIZE HAIL

0335 PM    STOCKPORT                 NY   1.75 INCH HAIL
06/20/01   COLUMBIA                       1.5 INCH TO 2 INCH SIZE
                                          HAIL

0345 PM    CAIRO                     NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0346 PM    CATSKILL                  NY   1.5 INCH HAIL
06/20/01   GREENE                         PING PONG BALL SIZE HAIL

0355 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0412 PM    CLAVERACK                 NY   1 INCH HAIL
06/20/01   COLUMBIA                       QUARTER SIZE HAIL

0418 PM    CATSKILL                  NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0426 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         7/8 TO 1 INCH HAIL

0430 PM    CATSKILL                  NY   .88 INCH HAIL
06/20/01   GREENE                         NICKEL SIZE HAIL

NNNN

Local storm report, Jun 20, 4:56 PM EDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
456 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0251 PM    GREENVILLE                NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0308 PM    COXSACKIE                 NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0325 PM    COXSACKIE                 NY   1.75 INCH HAIL
06/20/01   GREENE                         GOLF BALL SIZE HAIL

0335 PM    STOCKPORT                 NY   1.75 INCH HAIL
06/20/01   COLUMBIA                       1.5 INCH TO 2 INCH SIZE
                                          HAIL

0345 PM    CAIRO                     NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0346 PM    CATSKILL                  NY   1.5 INCH HAIL
06/20/01   GREENE                         PING PONG BALL SIZE HAIL

0355 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0412 PM    CLAVERACK                 NY   1 INCH HAIL
06/20/01   COLUMBIA                       QUARTER SIZE HAIL

0418 PM    CATSKILL                  NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0426 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         7/8 TO 1 INCH HAIL

0430 PM    CATSKILL                  NY   .88 INCH HAIL
06/20/01   GREENE                         NICKEL SIZE HAIL

0456 PM    LEE                       MA   .75 INCH HAIL
06/20/01   BERKSHIRE                      DIME SIZE HAIL

NNNN
KOLECI

Local storm report, Jun 20, 5:15 PM EDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
515 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0251 PM    GREENVILLE                NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0308 PM    COXSACKIE                 NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0325 PM    COXSACKIE                 NY   1.75 INCH HAIL
06/20/01   GREENE                         GOLF BALL SIZE HAIL

0335 PM    STOCKPORT                 NY   1.75 INCH HAIL
06/20/01   COLUMBIA                       1.5 INCH TO 2 INCH SIZE
                                          HAIL

0345 PM    CAIRO                     NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0346 PM    CATSKILL                  NY   1.5 INCH HAIL
06/20/01   GREENE                         PING PONG BALL SIZE HAIL

0355 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         QUARTER SIZE HAIL

0412 PM    CLAVERACK                 NY   1 INCH HAIL
06/20/01   COLUMBIA                       QUARTER SIZE HAIL

0418 PM    CATSKILL                  NY   .75 INCH HAIL
06/20/01   GREENE                         DIME SIZE HAIL

0426 PM    CATSKILL                  NY   1 INCH HAIL
06/20/01   GREENE                         7/8 TO 1 INCH HAIL

0426 PM    AUSTERLITZ                NY   1.5 INCH HAIL
06/20/01   COLUMBIA                       1 3/8 INCH HAIL

0430 PM    CATSKILL                  NY   .88 INCH HAIL
06/20/01   GREENE                         NICKEL SIZE HAIL

0456 PM    LEE                       MA   .75 INCH HAIL
06/20/01   BERKSHIRE                      DIME SIZE HAIL

NNNN
KOLECI

Nearby

Severe Thunderstorm Warnings in Vermont, 2001 Every severe thunderstorm warning in 2001

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.