Alert archive / Indiana / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 77, NWS Indianapolis, IN
NWS Indianapolis, IN issued this severe thunderstorm warning at May 31, 1991, 5:59 PM CDT for LaPorte County, Indiana. It was in force for 31 min. 1 report 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 31, 1991, 5:59 PM CDT (22:59 UTC)
- Expired
- May 31, 1991, 6:30 PM CDT
- In force
- 31 min
- Issued by
- NWS Indianapolis, IN
- Area
- Whole counties
County LaPorte County, IN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 6:20 PM CDT | Hail 1 | La Porte, 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
Dayton/James M C, OH (KDAY), launched 12:00Z, 11.0 hours before the alert went out and 282 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
- 281 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 665 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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, May 31, 3:30 PM CDT, 2 hours 29 minutes before
INZALL-010300- AREAL OUTLINE FOR SEVERE THUNDERSTORM WATCH NUMBER 449 NATIONAL WEATHER SERVICE INDIANAPOLIS IN 330 PM EST FRI MAY 31 1991 IN INDIANA SEVERE THUNDERSTORM WATCH NUMBER 449 IS IN EFFECT UNTIL 1000 PM EST AND INCLUDES THAT PART OF INDIANA... NORTH OF A LINE FROM 10 MILES NORTHWEST OF VALPARAISO IN PORTER COUNTY TO ANGOLA IN STEUBEN COUNTY. SOME CITIES INCLUDED ARE... SOUTH BEND...LAGRANGE...LA PORTE AND GOSHEN. REMEMBER...A WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE WEATHER 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.
Special weather statement, May 31, 5:31 PM CDT, 28 minutes before
INZALL-010300- AREAL OUTLINE FOR SEVERE THUNDERSTORM WATCH NUMBER 451 NATIONAL WEATHER SERVICE INDIANAPOLIS IN 525 PM EST FRI MAY 31 1991 IN INDIANA SEVERE THUNDERSTORM WATCH NUMBER 451 IS IN EFFECT UNTIL 1000 PM EST AND INCLUDES THAT PART OF INDIANA... NORTH OF A LINE FROM LAFAYETTE TO 10 MILES NORTH OF MUNCIE. SOME CITIES INCLUDED ARE... LAFAYETTE...LOGANSPORT...FORT WAYNE... KOKOMO...MARION...SOUTH BEND. REMEMBER...A WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE WEATHER 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. KOLDITZ
The office that day
Everything else NWS Indianapolis, IN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 4:16 PM CDT | Severe Thunderstorm Warning | IND | LaPorte | 44 min |
| May 31, 5:16 PM CDT | Tornado Warning | IND | Saint Joseph | 29 min |
| May 31, 6:40 PM CDT | Severe Thunderstorm Warning | IND | LaPorte, Starke | 50 min |
| May 31, 6:42 PM CDT | Flash Flood Warning | IND | Saint Joseph | 2 hr |
| May 30, 8:08 PM CDT | Severe Thunderstorm Warning | IND | Berrien | 37 min |
| May 31, 4:21 PM CDT | Severe Thunderstorm Warning | IND | Berrien | 54 min |
Nearby
Severe Thunderstorm Warnings in Indiana, 1991Every severe thunderstorm warning in 1991
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.