Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 196, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 30, 1999, 1:01 AM EDT for Columbia County, Lycoming County, Sullivan County, Pennsylvania. It was in force for 59 min. 2 reports 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
- Sep 30, 1999, 1:01 AM EDT (05:01 UTC)
- Expired
- Sep 30, 1999, 2:00 AM EDT
- In force
- 59 min
- Issued by
- NWS State College, PA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Columbia County, PA, Lycoming County, PA, Sullivan County, PA
The radar
The Binghamton radar (KBGM), 117 km from the middle of the area, began a volume at 05:02 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 |
|---|---|---|---|
| Sep 30, 1:15 AM EDT | Thunderstorm Wind | Catawissa, PA | Trees were down in Beaver Township about 3 miles southeast of Catawissa. |
| Sep 30, 1:20 AM EDT | Thunderstorm Wind | Laporte, PA | Tree down on Route 220 between LaPorte and Dushore. |
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 nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 00:00Z, 5.0 hours before the alert went out and 207 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
- 1173 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 155 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.
NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 29, 9:30 PM EDT, 3 hours 31 minutes earlier.
Area forecast discussion, Sep 29, 9:30 PM EDT, 3 hours 31 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
930 PM EDT WED SEP 29 1999
COLD FRONT MOVING A BIT FASTER THAN PREVIOUSLY THOUGHT...JUST ABOUT
TO ENTER THE WESTERN AREAS OF CTP CWA.
TWO THINGS TO CONSIDER. FIRST IS HIGH WIND WARNING. WITH VAD WINDS
PRETTY MUCH CONFIRMING WHAT THE MODELS WERE PROJECTING...THAT IS A
50 KT WIND AT AROUND 5K FEET...THINK I WILL KEEP HIGH WIND WARNING.
GOOD BAND OF CONVECTION AHEAD OF THE FRONT MAY MIX DAMAGING WINDS
DOWN TO THE SURFACE. ALTHOUGH SEVERE THREAT DIMINISHED...NEED TO
KEEP SOME TYPE OF WARNING OUT FOR THE HIGH WINDS.
AS FOR THE FLOODING...HAVE NOT SEEN ANY YET. IF FRONT CONTINUES TO
MOVE AT A GOOD CLIP...PROBABLY WILL SEE LITTLE IN THE WAY OF
FLOODING. HOWEVER STILL EXPECTING PCPN TO BLOSSOM SOMEWHAT OVER
CENTRAL AND EASTERN ZONES...WITH ADDED LL CONVERGENCE OF STRONG WEST
WIND BEHIND FRONT AND SOUTHEAST OVER SUSQUEHANNA VALLEY. ALSO...GULF
AND ATLANTIC MOISTURE WILL CONTINUE TO BE INCREASINGLY TAPPED WITH
TIME OVERNIGHT. HATE TO MAKE ADJUSTMENTS JUST AS HEAVIEST RAIN
MOVING INTO THE CWA. WILL THEREFORE KEEP THE WATCH INTACT AS WELL.
OVERALL...SEE NO MAJOR CHANGES TO THE OVERNIGHT ZONES...AS FORECAST
PACKAGE WAS PRETTY MUCH TAILORED A FEW HOURS AGO WITH THE PREVIOUS
UPDATE. WILL ADJUST TIMING OF WSHFT AND FROPA AS NEEDED.
.CTP...FLASH FLOOD WATCH INTO THU AM ALL COUNTIES.
...HIGH WIND WATCH OVERNIGHT ALL COUNTIES.
JUNGIn the hours before
Special weather statement, Sep 29, 8:10 PM EDT, 4 hours 51 minutes before
PAZ004>006-010>012-017>019-024>026-033>035-045-300200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 810 PM EDT WED SEP 29 1999 ...THE TORNADO WATCH FOR CENTRAL PENNSYLVANIA HAS BEEN CANCELLED... THE NATIONAL WEATHER SERVICE HAS CANCELLED THE TORNADO WATCH FOR THE FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA... WARREN... MCKEAN... POTTER... ELK... CAMERON... CLINTON... CENTRE... CLEARFIELD... CAMBRIA... BLAIR... HUNTINGDON... SOMERSET... BEDFORD AND FULTON. SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE REGION OVERNIGHT. ALTHOUGH ANY INDIVIDUAL THUNDERSTORM MAY PRODUCE A LOCAL GUST OF DAMAGING WIND...THE THREAT OF TORNADOES IS NO LONGER PRESENT. A HIGH WIND WARNING REMAINS IN EFFECT FOR ALL OF CENTRAL PENNSYLVANIA OVERNIGHT. STAY TUNED TO NOAA WEATHER RADIO...THE OFFICIAL VOICE OF THE NATIONAL WEATHER SERVICE...OR YOUR FAVORITE TELEVISION OR COMMERCIAL RADIO NEWS SOURCE FOR LATER STATEMENTS AND FORECASTS. .END/ JUNG ADDITIONAL WEATHER INFORMATION CAN BE FOUND ON THE WORLD WIDE WEB AT: HTTP://BOOKEND.MET.PSU.EDU (ALL LOWER CASE)
Special weather statement, Sep 29, 8:10 PM EDT, 4 hours 51 minutes before
PAZ004>006-010>012-017>019-024>026-033>035-045-300200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 810 PM EDT WED SEP 29 1999 ...THE TORNADO WATCH FOR CENTRAL PENNSYLVANIA HAS BEEN CANCELLED... THE NATIONAL WEATHER SERVICE HAS CANCELLED THE TORNADO WATCH FOR THE FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA... WARREN... MCKEAN... POTTER... ELK... CAMERON... CLINTON... CENTRE... CLEARFIELD... CAMBRIA... BLAIR... HUNTINGDON... SOMERSET... BEDFORD AND FULTON. SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE REGION OVERNIGHT. ALTHOUGH ANY INDIVIDUAL THUNDERSTORM MAY PRODUCE A LOCAL GUST OF DAMAGING WIND...THE THREAT OF TORNADOES IS NO LONGER PRESENT. A HIGH WIND WARNING REMAINS IN EFFECT FOR ALL OF CENTRAL PENNSYLVANIA OVERNIGHT. STAY TUNED TO NOAA WEATHER RADIO...THE OFFICIAL VOICE OF THE NATIONAL WEATHER SERVICE...OR YOUR FAVORITE TELEVISION OR COMMERCIAL RADIO NEWS SOURCE FOR LATER STATEMENTS AND FORECASTS. .END/ JUNG ADDITIONAL WEATHER INFORMATION CAN BE FOUND ON THE WORLD WIDE WEB AT: HTTP://BOOKEND.MET.PSU.EDU (ALL LOWER CASE)
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 10:06 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield | 54 min |
| Sep 29, 10:06 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 54 min |
| Sep 29, 10:27 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Potter | 78 min |
| Sep 29, 11:43 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 47 min |
| Sep 29, 11:46 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 44 min |
| Sep 30, 12:09 AM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 51 min |
| Sep 30, 12:09 AM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 66 min |
| Sep 30, 12:35 AM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 40 min |
| Sep 30, 1:01 AM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland | 59 min |
| Sep 30, 1:02 AM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 43 min |
| Sep 30, 1:25 AM EDT | Flash Flood Warning | CTP | Snyder, Union | 3 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1999Every severe thunderstorm warning in 1999
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.