Alert archive / Indiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 12, NWS Indianapolis, IN

April 20, 2000Clay County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 20, 2000, 1:31 PM EST for Clay County, Indiana. It was in force for 14 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Apr 20, 2000, 1:31 PM EST (18:31 UTC)
Expired: Apr 20, 2000, 1:45 PM EST
In force: 14 min
Issued by: NWS Indianapolis, IN
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Clay County, IN

The radar

The Indianapolis radar (KIND), 80 km from the middle of the area, began a volume at 18:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 10:00 AM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.5 hours before the alert went out and 150 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 595 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KIND 201832
SVRIND
INC021-201845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
131 PM EST THU APR 20 2000

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN WEST CENTRAL INDIANA

* UNTIL 145 PM EST

* AT 128 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER CENTER POINT...OR ABOUT 18 MILES EAST OF
  TERRE HAUTE...MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CENTER POINT AT 135 PM EST
  POLAND AT 140 PM EST

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO MOVE
TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN INDIANAPOLIS.

LAT...LON 3945 8721 3921 8721 3937 8698 3958 8707

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 Indianapolis, IN wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 3:15 AM EST, 10 hours 16 minutes earlier.

Area forecast discussion, Apr 20, 3:15 AM EST, 10 hours 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
315 AM EST THU APR 20 2000

PROGRESSIVE UPPR FLOW PTN XPCTD TO CONT DURG THIS FCST PD AS UPPR LO
CURRENTLY IN THE PLAINS CROSSES THE AREA TONIGHT AND MOVES INTO THE
APLCN MNTS ON FRI. SFC LO IS XPCTD TO MOV OVR THE NRN SECTIONS OF
THE FCST AREA TONIGHT. CDFNT IS PROGGED TO PASS THRU DURG THE
LT AFT/EVEN HRS. MODELS IN GOOD AGREEMENT WITH THESE DETAILS. FCST
FOCUS CENTERS ON PCPN AND SVR POTENTIAL.

NOT SEEING MUCH IN THE WAY OF SIG PCPN DVLPMENT OVR THE AREA YET WITH
RADAR SHOWING ONLY SCT SHWRS. APPEARS MAIN PCPN THREAT TODAY WL COME
IN TWO WAVES. THE FIRST WL ARRIVE LTR THIS MORN AS REMNANTS OF TSTM
COMPLEX CURRENTLY RACING NE ACRS MO/AR MOV THRU THE AREA. THERE
SHOULD BE A BREAK IN THE EARLY AFT...FOLLOWED BY ACTVY ASSOCIATED WITH
CDFNT IN THE LT AFT/EARLY EVE TIME FRAME. STILL APPEARS THREAT FOR
SOME SVR WITH THE CDFNT ACTVY. DECENT INSTABILITY/LIFT BY THIS AFT AS
LO LVL THERMAL RDG MOVS INTO THE AREA. THINK INSTABILITY MAY BE
MAXIMIZED FURTHER AS THERE COULD BE BREAKS IN THE CLD COVER IN THE
WAKE OF MORN ACTVY UNDER DRY SLOT...ESPECIALLY CONSIDERING THE LACK
OF WIDESPREAD LO CLDS UPSTREAM. THERE IS SOME SHEAR...HOWEVER BEST
SHEAR WL BE LOCATED S OF OH RVR WHERE LO/UPPR LVL JETS CROSS. ALL IN
ALL...HI POPS ARE IN ORDER ALL AREAS ALNG WITH A MENTION OF A FEW SVR
STORMS IN ZONES.

TSTMS SHOULD END FM SW TO NE WITH FROPA. APPEARS WRAP AROUND PCPN WL
MOV BACK INTO MOST ZONES LTR TONIGHT AND WL LINGER MAINLY OVR THE
NERN ZONES FRI MORN AS UPPR LO PULLS AWAY. WL CONT WITH HI POPS ALL
ZONES TONIGHT...AND GO WITH HI POPS IN THE NE ZONES FRI MORN TAPERING
TO CHC POPS IN T
HE SW.

CONSIDERING LO LVL TEMPS PTNS FM THE MODELS...OVERALL THE NGM MOS
TEMPS LOOK GOOD. WITH STG CAA ON FRI COMBINED WITH CLD COVER...THERE
SHOULD ONLY BE MODEST RISES ON FRI.

.IND...NONE.
JAS

In the hours before

Local storm report, Apr 20, 11:44 AM EST, 1 hour 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1144 AM EST THU APR 20 2000

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1142 AM    DELPHI                    IN   1 INCH HAIL
04/20/00   CARROLL                        EVENT DURATION 5
                                          MINUTES. REPORTED BY
                                          LAW ENFORCEMENT OFFICIIAL.

Local storm report, Apr 20, 11:48 AM EST, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1148 AM EST THU APR 20 2000

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1145 AM    DELPHI                    IN   .88 INCH HAIL
04/20/00   CARROLL                        REPORTED BY HAM RADIO
                                          OPERATOR. WB9BQK

Special weather statement, Apr 20, 11:48 AM EST, 1 hour 43 minutes before

INZ062-070-201720-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1148 AM EST THU APR 20 2000

A LINE OF THUNDERSTORMS STRETCHED FROM BLOOMINGTON TO BEDFORD IN
MONROE AND LAWRENCE COUNTIES. THESE STORMS WERE MOVING TO THE
NORTHEAST AT AROUND 50 MPH. GUSTY WINDS TO 45 MPH ALONG WITH HEAVY
RAINS AND FREQUENT LIGHTNING WILL BE POSSIBLE WITH THIS STORM.
SMALL HALL IS ALSO POSSIBLE.

A TORNADO WATCH IS IN EFFECT FOR MUCH OF WESTERN INDIANA...INCLUDING
MONROE AND LAWRENCE COUNTIES. PEOPLE SHOULD STAY ALERT TO WEATHER
CONDITIONS AND LISTEN FOR WARNINGS AND STATEMENTS TODAY.

PUMA

Special weather statement, Apr 20, 11:53 AM EST, 1 hour 38 minutes before

INZ043-044-051-052-060-067-201740-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1153 AM EST THU APR 20 2000

...STORNG THUNDERSTORMS APPROACHING WEST CENTRAL INDIANA...

A LINE OF STRONG THUNDERSTORMS IN EASTERN ILLINOIS WERE MOVING
NORTHEAST AT NEAR 50 MPH. THESE STORMS WILL PASS ACROSS VIGO...
VERMILLION...PARKE AND SULLIVAN COUNTIES IN THE NEXT FEW HOURS.
THESE STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS TO 45 MPH ALONG
WITH HEAVY RAINS AND FREQUENT LIGHTNING. HALL WILL BE ALSO POSSIBLE.

A TORNADO WATCH IS IN EFFECT FOR MUCH OF WESTERN INDIANA...INCLUDING
VIGO...VERMILLION...PARKE AND SULLIVAN COUNTIES. CITIES THAT WILL BE
EFFECTED INCLUDE TERRE HAUTE...SULLIVAN...ROCKVILLE AND
CLINTON. PEOPLE SHOULD STAY ALERT TO WEATHER CONDITIONS AND LISTEN
FOR WARNINGS AND STATEMENTS TODAY.

PUMA

Local storm report, Apr 20, 11:54 AM EST, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1154 AM EST THU APR 20 2000

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1120 AM    3 S LAFAYETTE             IN   1 INCH HAIL
04/20/00   TIPPECANOE                     EVENT DURATION 5
                                          MINUTES. REPORTED BY
                                          HAM RADIO OPERATOR.

Special weather statement, Apr 20, 12:38 PM EST, 53 minutes before

INZ043>045-051>053-060-061-067-201830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1238 PM EST THU APR 20 2000

...STRONG THUNDERSTORMS CROSSING WEST CENTRAL INDIANA...

A LINE OF STRONG THUNDERSTORMS STRETCHING FROM DANA IN
VERMILLION COUNTY TO EXTREME WESTERN SULLIVAN COUNTY ARE MOVING
NORTHEAST AT AROUND 40 MPH. THESE STORMS WILL PASS ACROSS VIGO...
VERMILLION...PARKE...CLAY AND SULLIVAN COUNTIES BY 130 PM
EST. THESE STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS TO 45 MPH
ALONG WITH HEAVY RAINS AND FREQUENT LIGHTNING. HALL WILL BE ALSO
POSSIBLE.

THE STORMS PRODUCED PEA SIZE HAIL AND GUSTS TO 40 MPH IN CLARK
COUNTY ILLINOIS.

A TORNADO WATCH IS IN EFFECT FOR MUCH OF WESTERN
INDIANA. CITIES THAT WILL BE EFFECTED INCLUDE TERRE HAUTE...
SULLIVAN...ROCKVILLE...BRAZIL AND CLINTON. PEOPLE SHOULD STAY ALERT
TO WEATHER CONDITIONS AND LISTEN FOR WARNINGS AND STATEMENTS TODAY.

PUMA

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 6:58 AM EST	Severe Thunderstorm Warning	IND	Madison	32 min
Apr 20, 10:45 AM EST	Severe Thunderstorm Warning	IND	Warren	30 min
Apr 20, 10:59 AM EST	Severe Thunderstorm Warning	IND	Tippecanoe	31 min
Apr 20, 11:18 AM EST	Tornado Warning	IND	Tippecanoe	27 min
Apr 20, 11:34 AM EST	Tornado Warning	IND	Carroll	41 min
Apr 20, 12:50 PM EST	Severe Thunderstorm Warning	IND	Vigo	25 min
Apr 20, 1:01 PM EST	Severe Thunderstorm Warning	IND	Clay	29 min
Apr 20, 1:23 PM EST	Severe Thunderstorm Warning	IND	Putnam	37 min
Apr 20, 1:37 PM EST	Severe Thunderstorm Warning	IND	Owen	38 min
Apr 20, 1:39 PM EST	Severe Thunderstorm Warning	IND	Hendricks	51 min
Apr 20, 2:37 PM EST	Severe Thunderstorm Warning	IND	Monroe, Morgan	38 min
Apr 20, 2:58 PM EST	Severe Thunderstorm Warning	IND	Lawrence	32 min
Apr 20, 3:04 PM EST	Severe Thunderstorm Warning	IND	Johnson	26 min
Apr 20, 3:19 PM EST	Severe Thunderstorm Warning	IND	Shelby	26 min
Apr 20, 3:48 PM EST	Severe Thunderstorm Warning	IND	Decatur, Rush	42 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2000 Every 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; radar from the NEXRAD Level II archive.