Alert archive / Indiana / Tornado Watches in 1998
Tornado Watch 176
The Storm Prediction Center issued this tornado watch at Apr 7, 1998, 10:00 PM CDT for 18 counties in Illinois; 29 counties in Indiana; Hancock County, Henderson County, Kentucky. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 1998, 10:00 PM CDT (03:00 UTC)
- Expired
- Apr 8, 1998, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 49 counties
Clay County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Lawrence County, IL, Marion County, IL, Perry County, IL, Richland County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Crawford County, IN, Daviess County, IN, Dearborn County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Ripley County, IN, Scott County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Hancock County, KY, Henderson County, KY
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 10:01 PM CDT | Tornado Warning | LMK | Dubois | 34 min |
| Apr 7, 10:14 PM CDT | Tornado Warning | PAH | Gibson, Pike | 61 min |
| Apr 7, 10:22 PM CDT | Tornado Warning | ILX | Jasper | 53 min |
| Apr 7, 10:27 PM CDT | Tornado Warning | LMK | Washington | 33 min |
| Apr 7, 10:33 PM CDT | Tornado Warning | ILX | Clay | 57 min |
| Apr 7, 10:35 PM CDT | Tornado Warning | LMK | Orange | 25 min |
| Apr 7, 10:59 PM CDT | Tornado Warning | LMK | Washington | 31 min |
| Apr 7, 11:09 PM CDT | Tornado Warning | ILX | Crawford, Jasper | 51 min |
| Apr 7, 11:13 PM CDT | Tornado Warning | LMK | Scott | 27 min |
| Apr 7, 11:56 PM CDT | Severe Thunderstorm Warning | LMK | Jefferson | 34 min |
| Apr 7, 11:56 PM CDT | Severe Thunderstorm Warning | PAH | Pike | 34 min |
| Apr 8, 12:01 AM CDT | Severe Thunderstorm Warning | ILN | Ripley | 49 min |
| Apr 8, 12:01 AM CDT | Tornado Warning | LMK | Jefferson | 29 min |
| Apr 8, 12:15 AM CDT | Severe Thunderstorm Warning | LMK | Dubois | 30 min |
| Apr 8, 12:39 AM CDT | Severe Thunderstorm Warning | ILN | Dearborn, Ohio | 61 min |
| Apr 8, 12:47 AM CDT | Tornado Warning | LMK | Jefferson | 28 min |
| Apr 8, 1:32 AM CDT | Flash Flood Warning | ILN | Dearborn | 118 min |
| Apr 8, 2:02 AM CDT | Severe Thunderstorm Warning | LMK | Jefferson | 33 min |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 3.0 hours before the alert went out and 204 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
- 756 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 671 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
490 WWUS9 KMKC 080238 SEL6 MKC WW 080238 ILZ000-INZ000-080900- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 176 STORM PREDICTION CENTER NORMAN OK 938 PM CDT TUE APR 7 1998 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHERN ILLINOIS SOUTHERN INDIANA EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1000 PM UNTIL 400 AM CDT. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 100 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST SOUTHWEST OF EVANSVILLE INDIANA TO 15 MILES NORTHEAST OF BLOOMINGTON INDIANA. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 174. WATCH NUMBER 174 WILL NOT BE IN EFFECT AFTER 1000 PM CDT. CONTINUE...WW 175... DISCUSSION...A FEW SUPERCELLS AND ISOLATED TORNADOES POSSIBLE LATER THIS EVENING ALONG AND N OF THE OH RIVER...WHERE LARGE SCALE ASCENT ASSOCIATED WITH APPROACHING 90 KT MID LEVEL JET STREAK WILL CONTINUE TO OFFSET DIURNAL BOUNDARY LAYER STABILIZATION. AREA VWP DATA CONTINUE TO SUGGEST AMPLE STORM-RELATIVE HELICITY FOR STORM ROTATION/LEWP DEVELOPMENT. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR 24040. ...CORFIDI... 374,0900 391,0881 391,0843 374,0862
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 7:00 PM CDT | Tornado Watch | SPC | Bureau, Cass, Champaign, Christian, Clark, Coles and 27 more | 6 hr |
| Apr 8, 5:30 PM CDT | Tornado Watch | SPC | Gallatin, Hardin, Massac, Pope, Saline | 7 hr |
| Apr 8, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Bartholomew, Blackford, Brown, Dearborn, Decatur and 24 more | 4 hr |
| Apr 8, 2:00 AM CDT | Tornado Watch | SPC | Clark, Jefferson, Switzerland | 6 hr |
| Apr 8, 12:15 PM CDT | Tornado Watch | SPC | Clark, Crawford, Dearborn, Decatur, Fayette, Floyd and 12 more | 6 hr |
| Apr 8, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | Bell, Breathitt, Clay, Estill, Floyd, Harlan and 12 more | 5 hr |
Nearby
Tornado Watches in Indiana, 1998Tornado Watches in Illinois, 1998Tornado Watches in Kentucky, 1998Every tornado watch in 1998
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.