Alert archive / Pennsylvania / Special Weather Statements in 2018

Special Weather Statement, NWS State College, PA

August 3, 2018Columbia County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 3, 2018, 1:57 PM EDT for Columbia County, Pennsylvania. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 3, 2018, 1:57 PM EDT (17:57 UTC)
Expired
Aug 3, 2018, 2:30 PM EDT
In force
33 min
Issued by
NWS State College, PA

County Columbia County, PA

The radar

The Binghamton radar (KBGM), 122 km from the middle of the area, began a volume at 17:57 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.0 hours before the alert went out and 259 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 2018-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 355 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 2018-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.193958Sfc1 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
355 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
542 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 3, 1:22 PM EDT, 35 minutes earlier.

Area forecast discussion, Aug 3, 1:22 PM EDT, 35 minutes before
Area Forecast Discussion
National Weather Service State College PA
122 PM EDT Fri Aug 3 2018

.SYNOPSIS...
A plume of deep tropical moisture will continue to stream north
across the Commonwealth into early tonight bringing locally
heavy rain. A weak cold front will push east across Pennsylvania
later tonight and early Saturday, sweeping the moisture off the
Mid Atlantic Coast. High pressure building in will bring drier
but still humid weather and increasing sunshine throughout the
upcoming weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
Focus for locally heavy rain continues through Central PA.
Rainfall readings were running almost twice what radar estimates
were indicating and so we changed to tropical mode on the radar.
We have had lots of reports of roads flooding with the more
intense rains. The ground is saturated and so almost all of the
rain immediately turns into runoff. Current large area of rain
from Blair and Center Counties on north and Northwest will
continue to move toward upstate NY. This will provide a break in
the action, however, some breaks in clouds to the south is
already helping to spark the development of more afternoon
showers and scattered thunderstorms.

This rain was being triggered and focused within a zone of
strong low-mid level FGEN, and impressive 925-850 mb Theta-E
convergence, within the Right Entrance region of a 75-85kt upper
level jet with its core extending from Lake Erie...NE to Ottawa
and Montreal, Canada. Flash Flood Watch remains in effect for
most of the area overnight...with FF guidance remaining very low
given recent copious rains.

Showers/storms should wane and slide to the east tonight as the
trough to the west opens up a bit and we get more westerly flow
at the sfc and aloft following the passage of a weak cold front.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY/...
PWATs returning to near normal values of 25-30mm for the
weekend within a weak ridge of sfc high pressure and generally
fair/dry conditions. Afternoon temperatures will be back into
the 80s with overnight lows from near 60 north to 70 south.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Warmer temps, higher humidity and an increasing chance for
mainly afternoon/evening showers and thunderstorms returns for
early next week.

&&

.AVIATION /17Z FRIDAY THROUGH TUESDAY/...
Large area of rain now shifting north into the north-central
counties. Trend for the balance of the afternoon will be for
showers and isolated thunderstorms to continue streaming
northeastward.

HRRR and short range models continue to slowly shift the focus
of rain and storms east during the evening and overnight.

The hit-and-miss variety of the heavy rain cells and storms make
timing into the TAFs difficult. At this time, have covered with
TEMPO groups to account for conditions, which could swing rather
quickly from IFR to VFR and back again.

Dense areas of fog likely overnight central and western areas,
with rain continuing for the eastern airfields.

For Saturday, expecting widespread morning fog, and some
lingering rain in the east, with improvements to VFR in all
areas by later morning into early afternoon.

.Outlook...

Sat...Morning fog/low clouds central and west in the AM.
Lingering rain and IFR restrictions in the east. Becoming VFR.

Sun...Patchy AM fog possible, otherwise VFR.

Mon...Mainly VFR, with isolated PM TSRA impacts possible
West.

Tue...Mainly VFR, with scattered PM TSRA impacts possible.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch until 10 PM EDT this evening for PAZ012-
017>019-024>028-033>037-041-042-045-046-049>053-056>059-
063>066.

&&

SYNOPSIS...Watson
NEAR TERM...Watson/Lambert
SHORT TERM...Watson/Lambert
LONG TERM...Lambert/Gartner
AVIATION...Jung/Martin
Hazardous weather outlook, Aug 3, 3:27 AM EDT, 10 hours 30 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
327 AM EDT Fri Aug 3 2018

PAZ004>006-010-011-040730-
Warren-McKean-Potter-Elk-Cameron-
327 AM EDT Fri Aug 3 2018

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ012-017>019-024>026-033>035-037-041-045-040730-
Northern Clinton-Clearfield-Northern Centre-Southern Centre-Cambria-
Blair-Huntingdon-Somerset-Bedford-Fulton-Tioga-Northern Lycoming-
Southern Clinton-
327 AM EDT Fri Aug 3 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ027-028-036-042-046-049>053-056>059-063>066-040730-
Mifflin-Juniata-Franklin-Sullivan-Southern Lycoming-Union-Snyder-
Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-
Cumberland-Adams-York-Lancaster-
327 AM EDT Fri Aug 3 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

Lambert

In the hours before

Local storm report, Aug 3, 11:13 AM EDT, 2 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1113 AM EDT FRI AUG 03 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1112 AM     FLASH FLOOD      STATE COLLEGE           40.79N  77.86W
08/03/2018                   CENTRE             PA   911 CALL CENTER

            NUMEROUS ROADS CLOSED IN THE STATE COLLEGE AREA
            INCLUDING ROCK ROAD, BENNER PIKE BY SHEETZ, AND E
            COLLEGE AVENUE BY YBC.

&&

EVENT NUMBER CTP1802077

JRB
Local storm report, Aug 3, 11:18 AM EDT, 2 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1118 AM EDT FRI AUG 03 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1117 AM     HEAVY RAIN       STORMSTOWN              40.79N  78.02W
08/03/2018  M2.05 INCH       CENTRE             PA   PUBLIC

            SINCE MIDNIGHT

&&

EVENT NUMBER CTP1802078

JRB
Local storm report, Aug 3, 11:21 AM EDT, 2 hours 36 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1121 AM EDT FRI AUG 03 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0430 AM     FLASH FLOOD      STATE COLLEGE           40.79N  77.86W
08/03/2018                   CENTRE             PA   911 CALL CENTER

            NUMEROUS FLOODED ROADWAYS INCLUDING FOX HOLLOW RD, WEST
            PINE GROVE ROAD, AND EAST COLLEGE AVENUE.

0628 AM     HEAVY RAIN       NWS STATE COLLEGE       40.83N  77.85W
08/03/2018  M2.31 INCH       CENTRE             PA   NWS OFFICE

            STORM TOTAL RAINFALL FRIDAY MORNING

0730 AM     HEAVY RAIN       LOCK HAVEN              41.14N  77.45W
08/03/2018  M1.42 INCH       CLINTON            PA   TRAINED SPOTTER

            RAINFALL SINCE MIDNIGHT

0738 AM     HEAVY RAIN       NITTANY MALL            40.83N  77.81W
08/03/2018  M2.40 INCH       CENTRE             PA   NWS EMPLOYEE

            TOTAL SINCE MIDNIGHT

0814 AM     HEAVY RAIN       LEMONT                  40.81N  77.82W
08/03/2018  M3.02 INCH       CENTRE             PA   TRAINED SPOTTER

            TOTAL SINCE MIDNIGHT

0815 AM     HEAVY RAIN       HOUSERVILLE             40.83N  77.83W
08/03/2018  M2.86 INCH       CENTRE             PA   NWS EMPLOYEE

            24-HOUR RAINFALL.

0850 AM     HEAVY RAIN       2 NW MONTOURSVILLE      41.27N  76.95W
08/03/2018  M2.50 INCH       LYCOMING           PA   TRAINED SPOTTER

            6AM TO 830 AM

0945 AM     FLASH FLOOD      ALTOONA                 40.51N  78.40W
08/03/2018                   BLAIR              PA   TRAINED SPOTTER

            WATER FLOWING INTO HOUSES AND ACROSS ROADS BETWEEN 13TH
            AND 15TH STREETS IN ALTOONA. ROADS INCLUDE PLEASANT
            VALLEY BLVD AND ADAMS AVENUE ALONG BRUSH RUN.

1000 AM     HEAVY RAIN       1 SE PINE HALL          40.77N  77.87W
08/03/2018  M2.34 INCH       CENTRE             PA   NWS EMPLOYEE

            OVERNIGHT TOTAL

1029 AM     FLASH FLOOD      DUSHORE                 41.53N  76.40W
08/03/2018                   SULLIVAN           PA   PEMA

            NUMEROUS REPORTS OF WATER AND DEBRIS ACROSS ROADWAYS
            INCLUDING JULIA STREET, WORLDS END ROAD IN FORKS
            TOWNSHIP, AND ROUTE 220 IN DUSHORE BOROUGH.

1109 AM     FLASH FLOOD      BARBOURS                41.40N  76.78W
08/03/2018                   LYCOMING           PA   911 CALL CENTER

            LOWER BARBOURS RD CLOSED ALONG THE LOYALSCOCK CREEK.
            MANY ADDITIONAL ROADS CLOSED ALONG LOYALSOCK CREEK INTO
            SULLIVAN COUNTY.

1112 AM     FLASH FLOOD      STATE COLLEGE           40.79N  77.86W
08/03/2018                   CENTRE             PA   911 CALL CENTER

            NUMEROUS ROADS CLOSED IN THE STATE COLLEGE AREA
            INCLUDING ROCK ROAD, BENNER PIKE BY SHEETZ, AND E
            COLLEGE AVENUE BY YBC.

1117 AM     HEAVY RAIN       STORMSTOWN              40.79N  78.02W
08/03/2018  M2.05 INCH       CENTRE             PA   PUBLIC

            SINCE MIDNIGHT

&&

EVENT NUMBER CTP1802066 CTP1802067 CTP1802068 CTP1802069 CTP1802070
CTP1802071 CTP1802072 CTP1802075 CTP1802073 CTP1802074 CTP1802076
CTP1802077 CTP1802078

JRB
Local storm report, Aug 3, 11:24 AM EDT, 2 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1124 AM EDT FRI AUG 03 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     HEAVY RAIN       JERSEY SHORE            41.20N  77.27W
08/03/2018  E1.67 INCH       LYCOMING           PA   SOCIAL MEDIA

            24-HOUR RAINFALL.

&&

EVENT NUMBER CTP1802079

JRB
Local storm report, Aug 3, 1:48 PM EDT, 9 minutes before
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Special weather statement, Aug 3, 1:57 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 10:31 PM EDTAreal Flood AdvisoryCTPBedford, Somerset119 min
Aug 3, 12:25 AM EDTAreal Flood AdvisoryCTPCambria, Somerset3 hr
Aug 3, 1:52 AM EDTAreal Flood AdvisoryCTPCentre, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 5 more3 hr
Aug 3, 3:19 AM EDTAreal Flood AdvisoryCTPCentre, Clinton, Columbia, Lycoming, Montour, Northumberland and 2 more3 hr
Aug 3, 4:16 AM EDTFlash Flood WarningCTPCentre, Huntingdon3 hr
Aug 3, 6:26 AM EDTAreal Flood AdvisoryCTPClinton, Columbia, Lycoming, Montour, Northumberland, Sullivan and 2 more3 hr
Aug 3, 6:45 AM EDTAreal Flood WarningCTPCentre3 hr
Aug 3, 7:24 AM EDTRiver Flood WarningCTPCentre, Clinton4 hr
Aug 3, 8:11 AM EDTAreal Flood AdvisoryCTPBedford, Blair, Cambria3 hr
Aug 3, 8:21 AM EDTFlash Flood WarningCTPLycoming, Sullivan6 hr
Aug 3, 9:05 AM EDTFlash Flood WarningCTPBedford, Blair3 hr
Aug 3, 9:16 AM EDTAreal Flood AdvisoryCTPBedford, Somerset3 hr
Aug 3, 9:49 AM EDTFlash Flood WarningCTPCentre, Huntingdon3 hr
Aug 3, 11:25 AM EDTAreal Flood AdvisoryCTPCentre, Clinton, Lycoming3 hr
Aug 3, 12:24 PM EDTAreal Flood AdvisoryCTPLycoming, Northumberland, Snyder, Union3 hr
Aug 3, 12:43 PM EDTAreal Flood WarningCTPCentre3 hr
Aug 3, 1:38 PM EDTRiver Flood WarningCTPCentre, Clinton16 hr
Aug 3, 1:43 PM EDTAreal Flood AdvisoryCTPLycoming, Tioga3 hr
Aug 3, 2:19 PM EDTAreal Flood WarningCTPLycoming, Sullivan3 hr
Aug 3, 2:34 PM EDTSpecial Weather StatementCTPUnion26 min
Aug 3, 2:45 PM EDTAreal Flood AdvisoryCTPClinton2 hr
Aug 3, 3:40 PM EDTSpecial Weather StatementCTPUnion35 min
Aug 3, 3:44 PM EDTAreal Flood AdvisoryCTPCentre3 hr
Aug 3, 4:50 PM EDTAreal Flood AdvisoryCTPClinton3 hr
Aug 3, 5:05 PM EDTAreal Flood AdvisoryCTPColumbia, Montour115 min
Aug 3, 5:31 PM EDTAreal Flood AdvisoryCTPLycoming, Sullivan119 min
Aug 3, 6:51 PM EDTRiver Flood WarningCTPBlair, Huntingdon9 hr
Aug 3, 7:03 PM EDTAreal Flood AdvisoryCTPLancaster, York117 min
Aug 3, 7:37 PM EDTAreal Flood AdvisoryCTPLebanon113 min
Aug 3, 7:47 PM EDTAreal Flood AdvisoryCTPClinton118 min

Nearby

Special Weather Statements in Pennsylvania, 2018Every special weather statement in 2018

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.