Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 196, NWS State College, PA

August 1, 2000Northumberland County, Snyder County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 1, 2000, 4:50 PM EDT for Northumberland County, Snyder County, Pennsylvania. It was in force for 55 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
Aug 1, 2000, 4:50 PM EDT (20:50 UTC)
Expired
Aug 1, 2000, 5:45 PM EDT
In force
55 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Northumberland County, PA, Snyder County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.8 hours before the alert went out and 211 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2000-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 375 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2000-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
375 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
771 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCTP 012051
SVRCTP
PAC097-109-012145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
450 PM EDT TUE AUG 1 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SNYDER COUNTY.
  NORTHUMBERLAND COUNTY.

* UNTIL 545 PM EDT.

* AT 447 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER MIDDLEBURG...OR 8 MILES WEST OF
  SELINSGROVE...MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FREEBURG AT 455 PM.
  HERNDON AT 500 PM.
  HUMMELS WHARF AND SELINSGROVE AT 505 PM.
  SHAMOKIN DAM AT 510 PM.
  NORTHUMBERLAND AND SUNBURY AT 515 PM.

SEVERE THUNDERSTORMS CAN OCCASIONALLY PRODUCE TORNADOES.

THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS. SEVERE 
THUNDERSTORMS CONTAIN DAMAGING WINDS 58 MPH OR STRONGER OR HAIL THREE
QUARTERS OF AN INCH OR LARGER.>

$$
ONDREJIK
LAT...LON 4084 7719 4066 7723 4072 7668 4092 7669

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 State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 2:00 PM EDT, 2 hours 50 minutes earlier.

Area forecast discussion, Aug 1, 2:00 PM EDT, 2 hours 50 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
200 PM EDT TUE AUG 01 2000

S/W PULLING (YES...ACTUALLY MOVING) UP INTO NYS FM OH THIS
AFTN...AND LIGHTING UP WRN/NRN PA ATTM. DIURNALLY/OROGRAPHICALLY
DRIVEN TSRA ALSO POPPING IN SE. THINGS ACTUALLY MOVING TODAY...BUT
TRAINING/REPEATING TSRA STILL A CONCERN. FAINT BOUNDARY OV POCONOS
CONTINUES TO WORRY ME AS A FOCUS FOR TSTM DEVLPMNT...ESP AS THIS
COOLING ALOF NEARS DURING PEAK HEATING. FFA AGAIN??? OH BOY. GOTTA
AGREE W/PIT ON THIS ONE...WL NOT ISSUE FFA UNLESS I CAN SEE THE
WHITES OF IT/S EYES. PROGRESSION IS 9 TENTHS OF THE LAW.

THE ETA PLAYS A SCENARIO LIKE YSDTY OF THINGS DYING OFF RIGHT AT
SSET. THIS WUD BE WELCOME NEWS...AS PWS/AVBL MSTR STILL VERY HI ATTM.
WED LOOKING LIKE A LOW POP DAY...DESPITE THE POTENTIAL. JET DYNAMICS
NOT QUITE COMING TOGETHER...AS AREA PROGGD TO BE ALMOST (KEY WORD)
IN RIGHT ENT REGION OF UPR JET. GOOD FRONT TO PASS ON THURS AND
SIGNAL THE (DEFACTO) END TO THIS PTRN.

XTNDD: STILL LOOKING MAINLY DRY SAT...BUT FRI & SUN SURROUND IT
W/CHC POPS. LONGER RANGE ENSEMBLE SHOWING LONGWV TROF TO DIG OVHD OR
CLOSER TO THE E COAST THAN CURR BEAST...WHILE BROAD RIDGE DEVLPS IN
MIDWEST/PLAINS. THIS SHUD BE A MORE PROGRESSIVE AND NOT SO WET PTRN
FOR US. FMR TEMPS CLOSE TO SEASONALS...AND SEE NO REASON TO STRAY.

.CTP...NONE.

DANGELO

In the hours before

Special weather statement, Aug 1, 2:50 PM EDT, 2 hours before
PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-020134-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
250 PM EDT TUE AUG 1 2000

...THUNDERSTORMS WITH HEAVY RAIN AND GUSTY WINDS MOVING THROUGH THE
REGION THIS AFTERNOON AND EVENING...

SHOWERS AND THUNDERSTORMS HAVE FORMED OVER WESTERN AND CENTRAL
PENNSYLVANIA THIS AFTERNOON AS AN UPPER LEVEL DISTURBANCE AND
DAYTIME HEATING HAVE COMBINED FORCES.  THE STORMS ARE PROGRESSING
STEADILY EASTWARD...AND WILL MOVE INTO THE EASTERN HALF OF THE STATE BY
SUNSET. THE THUNDERSTORM ACTIVITY SHOULD DIE DOWN THROUGH THE
EVENING...AS WE LOSE THE HEATING OF THE DAY.

THESE THUNDERSTORMS MAY PRODUCE BRIEF WIND GUSTS OVER 40 MPH AND
SOME SMALL HAIL. MANY OF THESE THUNDERSTORMS MAY ALSO PRODUCE ENOUGH
RAIN IN A SHORT AMOUNT OF TIME TO BRIEFLY CAUSE STREETS TO BECOME
WATER-COVERED AND SMALL STREAMS TO FILL.

IF YOU LIVE IN A FLOOD PRONE AREA...OR A PLACE THAT HAS RECEIVED
HEAVY RAIN IN THE PAST FEW DAYS...PLEASE MONITOR THE WATER LEVELS
NEAR YOUR HOME. IF TRAVELING...DO NOT CROSS WATER THAT COVERS THE
ROADWAY. LISTEN TO THIS STATION FOR FURTHER UPDATEOS AND POSSIBLE
WARNINGS FROM YOUR NATIONAL WEATHER SERVICE.

DANGELO

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 1, 4:11 PM EDTTornado WarningCTPLycoming, Sullivan34 min
Aug 1, 4:44 PM EDTTornado WarningCTPSullivan31 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2000Every severe thunderstorm warning in 2000

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.