Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 128, NWS State College, PA

August 20, 1994Centre County, Clinton County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 20, 1994, 4:43 PM EDT for Centre County, Clinton County, Pennsylvania. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Aug 20, 1994, 4:43 PM EDT (20:43 UTC)
Expired
Aug 20, 1994, 5:15 PM EDT
In force
32 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Centre County, PA, Clinton County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.7 hours before the alert went out and 221 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, Buffalo Intl Airport, NY at 12:00Z on 1994-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 454 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, Buffalo Intl Airport, NY at 12:00Z on 1994-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 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
454 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1189 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

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.

In the hours before

Special weather statement, Aug 20, 1:55 PM EDT, 2 hours 48 minutes before
PAZ004>006-010>012-017>019-045-046-049>053-201955-

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
155 PM EDT SAT AUG 20 1994

...SLOW MOVING THUNDERSTORMS FORMING OVER CLINTON COUNTY...

AT 150 PM STATE COLLEGE DOPPLER RADAR SHOWED TWO THUNDERSTORMS OVER
CLINTON COUNTY. THE FIRST STORM WAS 15 MILES SOUTH OF RENOVO AND THE
SECOND STORM WAS 10 MILES NORTHEAST OF RENOVO. THESE STORMS WERE NEARLY
STATIONARY AND WILL PRODUCE LOCALLY HEAVY RAINFALL.

IF THREATENING WEATHER APPROACHES TAKE SAFE SHELTER IMMEDIATELY.

LA CORTE/NICOSIA
Special weather statement, Aug 20, 1:56 PM EDT, 2 hours 47 minutes before
PAZ004>006-010>012-017>019-045-046-049>053-201955-

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
155 PM EDT SAT AUG 20 1994

...SLOW MOVING THUNDERSTORMS FORMING OVER CLINTON COUNTY...

AT 150 PM STATE COLLEGE DOPPLER RADAR SHOWED TWO THUNDERSTORMS OVER
CLINTON COUNTY. THE FIRST STORM WAS 15 MILES SOUTH OF RENOVO AND THE
SECOND STORM WAS 10 MILES NORTHEAST OF RENOVO. THESE STORMS WERE NEARLY
STATIONARY AND WILL PRODUCE LOCALLY HEAVY RAINFALL.

IF THREATENING WEATHER APPROACHES TAKE SAFE SHELTER IMMEDIATELY.

LA CORTE/NICOSIA
Special weather statement, Aug 20, 4:00 PM EDT, 43 minutes before
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Special weather statement, Aug 20, 4:01 PM EDT, 42 minutes before
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Special weather statement, Aug 20, 4:35 PM EDT, 8 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Aug 20, 4:36 PM EDT, 7 minutes before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 2:00 PM EDTFlash Flood WarningCTPClinton2 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1994Every severe thunderstorm warning in 1994

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.