Alert archive / Indiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 12, NWS Indianapolis, IN
NWS Indianapolis, IN issued this severe thunderstorm warning at May 20, 1987, 2:28 PM EST for Monroe County, Owen County, Indiana. It was in force for 47 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 20, 1987, 2:28 PM EST (19:28 UTC)
- Expired
- May 20, 1987, 3:15 PM EST
- In force
- 47 min
- Issued by
- NWS Indianapolis, IN
- Area
- Whole counties
Counties Monroe County, IN, Owen County, IN
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 20, 2:29 PM EST | Thunderstorm Wind 0 | Owen, IN | |
| May 20, 3:15 PM EST | Hail 1 | Monroe, IN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Salem-Leckrone, IL (KSLO), launched 12:00Z, 7.5 hours before the alert went out and 203 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
- 2199 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 941 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KIND 201928 SVRIND INC119-105-202015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE INDIANAPOLIS IN 228 PM EST WED MAY 20 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 PM EST FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL INDIANA...EXTREME EASTERN OWEN AND NORTHERN MONROE AT 225 PM EST A SEVERE THUNDERSTORM WAS INDICATED BY RADAR ABOUT 30 MILES SOUTHWEST OF INDIANAPOLIS IN EASTERN OWEN COUNTY. THE STORM WAS MOVING EAST AT 20 MILES AN HOUR AND WILL MOVE INTO NORTHERN MONROE COUNTY BETWEEN 230 PM AND 300 PM EST. PERSONS IN EASTERN OWEN AND NORTHERN MONROE COUNTY SHOULD BE PREPARED TO SEEK SLHELTER WHEN THIS STORM APPROACHES. THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS AND UNDERPASSES THIS STORM IS ACCOMPANIED BY INTENSE LIGHTNING AND STRONG GUSTY WINDS. EDWARDS
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, May 20, 9:08 AM EST, 5 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INDIANAPOLIS IN 905 AM WED MAY 20 1987 ...FOG ADVISORY FOR NORTHERN INDIANA IS NO LONGER IN EFFECT... THE FOG ADVISORY THAT WAS ISSUED FOR THE NORTH THIRD OF INDIANA EARLIER THIS MORNING IS NO LONGER IN EFFECT. AT 9 AM EST VISIBILITIES HAVE IMPROVED TO 1/4 MILE OR BETTER AND CONTINUED IMPROVEMENT IS EXPECTED. THERE ARE STILL PATCHY AREAS OF DENSE FOG WITH VISIBILITIES OF 1/8 MILE IN NORTHEAST INDIANA. MOTORISTS SHOULD REMAIN ALERT WHEN DRIVING THROUGH SECTIONS OF NORTHEAST INDIANA. MEANWHILE... AT 9 AM EST A FEW SMALL AREAS OF THUNDERSTORMS MOVED INTO SECTIONS OF NORTHWEST INDIANA BETWEEN LAFAYETTE AND GARY. A FEW OF THE STORMS MAY PRODUCE HEAVY DOWNPOURS AS IT SLOWLY MOVES THROUGH NORTHERN INDIANA THIS MORNING. KOLDITZ
Special weather statement, May 20, 10:21 AM EST, 4 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INDIANAPOLIS IN 1015 AM EST WED MAY 20 1987 VERY STRONG THUNDERSTORMS CONTINUED TO FIRE UP OVER CENTRAL INDIANA. AT 1010 AM EST A THUNDERSTORM WAS MOVING OVER DOWNTOWN INDIANAPOLIS. HOWEVER THE STRONGEST STORMS WERE ABOUT 25 MILES NORTH OF INDIANAPOLIS...SOUTH OF SHERIDAN AND ABOUT 40 MILES NORTH OF INDIANAPOLIS...EAST OF FRANKFORT. ALL OF THESE STORMS WERE MOVING EAST AT 10 MILES AN HOUR AND WILL PRODUCE DRENCHING RAINS AND CONSIDERABLE LIGHTNING. ANOTHER STRONG THUNDERSTORM HAS CROSSED INTO WEST CENTRAL INDIANA EAST OF DANVILLE ILLINOIS OR ABOUT 40 MILES SOUTHWEST OF LAFAYETTE. A NEW DEVELOPED THUNDERSTORM WAS 30 MILES NORTHWIEST OF INDIANPOLIS SOUTHEAST OF CRAWFORDSVILLE. EDWARDS
Local storm report, May 20, 12:16 PM EST, 2 hours 12 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1215PM EST WED MAY 20 1987
1203 PM EST SEVERAL TREES BLOWN DOWN IN THE CITY OF CRAWFORDSVILLE
REPORTED BY THE CITY POLICE AT CRAWFORDSVILLE.
CURRANSpecial weather statement, May 20, 1:19 PM EST, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INDIANAPOLIS IN 120 PM EST WED MAY 20 1987 A SEVERE THUNDERSTORM WATCH CONTINUES UNTIL 6PM EST FOR A LARGE PART OF CENTRAL AND SOUTH EAST INDIANA. THE STATE POLICE AT TERRE HAUTE REPORTED WIND GUSTS TO NEAR 50 MILES AN HOUR ABOUT 15 MILES NORTH OF TERRE HAUTE. STRONG STORMS ARE MOVING ACROSS THIS REGION AND PERSONS IN WESTERN PARKE COUNTY SHOULD BE ALERT FOR POTENTIAL OF SEVERE STORMS BETWE EN 120PM AND 200PM EST. OTHER THUNDERSTORMS WERE NORTH AND NORTHEAST OF MUNCIE. ALL STORMS WERE MOVING EAST AT 20 MILES AN HOUR. EDWARDS
The office that day
Everything else NWS Indianapolis, IN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 9:37 PM EST | Tornado Warning | IND | Perry, Spencer | 38 min |
| May 20, 11:18 AM EST | Severe Thunderstorm Warning | IND | Clinton, Montgomery | 57 min |
| May 20, 12:25 PM EST | Severe Thunderstorm Warning | IND | Montgomery | 35 min |
| May 20, 1:23 PM EST | Severe Thunderstorm Warning | IND | Parke, Vermillion | 52 min |
| May 20, 3:40 PM EST | Severe Thunderstorm Warning | IND | Monroe | 35 min |
| May 20, 4:00 PM EST | Flash Flood Warning | IND | Monroe, Owen | 2 hr |
Nearby
Severe Thunderstorm Warnings in Indiana, 1987Every severe thunderstorm warning in 1987
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.