Alert archive / Indiana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 139, NWS Louisville, KY

September 7, 2001Orange County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Sep 7, 2001, 4:31 PM EST for Orange County, Indiana. It was in force for 29 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
Sep 7, 2001, 4:31 PM EST (21:31 UTC)
Expired
Sep 7, 2001, 5:00 PM EST
In force
29 min
Issued by
NWS Louisville, KY
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Orange County, IN

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.5 hours before the alert went out and 253 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, Cncnati-Daytn, OH at 12:00Z on 2001-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1168 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, Cncnati-Daytn, OH at 12:00Z on 2001-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
1168 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.4

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.

NWS Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 7, 1:45 PM EST, 2 hours 46 minutes earlier.

Area forecast discussion, Sep 7, 1:45 PM EST, 2 hours 46 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOUISVILLE KY
245 PM EDT FRI SEP 7 2001

THE WARM AND MOIST SOUTHERLY FLOW WILL REMAIN IN PLACE ACROSS THE
LOWER OHIO VALLEY THROUGH THE WEEKEND.

SCATTERED THUNDERSTORMS DEVELOPED THIS AFTERNOON ACROSS THE WESTERN
PORTION OF THE COUNTY FORECAST AREA AND THUNDERSTORMS WILL BE THE
CONCERN FOR THE REST OF THE WEEKEND.

THE MEAN UPPER LEVEL PATTERN DOES NOT CHANCE MUCH OVER THE NEXT 48
HOURS WITH A BROAD TROF OVER THE NORTHERN ROCKIES AND A RIDGE OFF
THE EAST COAST. A SERIES OF S/WS WILL ROTATE AROUND THE BASE OF THE
TROF. WE EXPECT THE THUNDERSTORMS TO DIMINISH THIS EVENING WITH ONLY
AN ISOLATED TSTM OR TO OVERNIGHT. AS MENTIONED ANOTHER S/W WILL
ROUND THE BASE OF THE TROF AND MOVE THROUGH MISSOURI ON SATURDAY.
THUNDERSTORMS SHOULD REMAIN CONFINED TO THE WESTERN PORTION OF THE
CFA SATURDAY. THE UPPER TROF WILL BEGIN TO SHIFT EAST ON SUNDAY AND
WITH IT WILL COME A BETTER CHANCE OF SHOWERS AND THUNDERSTORMS.

MODELS THIS RUN HAVE SLOWED THE FRONTAL PASSAGE UNTIL LATE MONDAY SO
WE WILL CONTINUE THE MENTION OF RAIN ON MONDAY AND DRY IT OUT
TUESDAY.

.SDF...NONE.

JA

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 7, 4:16 PM ESTSevere Thunderstorm WarningLMKDubois29 min
Sep 7, 5:42 PM ESTFlash Flood WarningLMKDubois33 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2001Every 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; the sounding from the Mesonet's radiosonde archive.