Alert archive / Michigan / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 110, NWS Indianapolis, IN
NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 7, 1991, 6:53 PM EDT for Berrien County, Michigan. It was in force for 52 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
- Jul 7, 1991, 6:53 PM EDT (22:53 UTC)
- Expired
- Jul 7, 1991, 7:45 PM EDT
- In force
- 52 min
- Issued by
- NWS Indianapolis, IN
- Area
- Whole counties
County Berrien County, MI
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 7:10 PM EDT | Thunderstorm Wind 61 | Berrien, MI | |
| Jul 7, 7:35 PM EDT | Thunderstorm Wind 0 | Berrien, MI |
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
Detroit, MI (KFNT), launched 12:00Z, 10.9 hours before the alert went out and 262 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
- 1038 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.3
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, Jul 7, 3:55 PM EDT, 2 hours 58 minutes before
INZALL-080300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INDIANAPOLIS IN 254 PM EST SUN JUL 7 1991 IN INDIANA THIS TORNADO WATCH IS IN EFFECT UNTIL 1000 PM EST AND INCLUDES THAT PART OF INDIANA... NORTHWEST OF A LINE FROM 30 MILES SOUTH OF GARY TO 35 MILES SOUTHEAST OF GARY TO 20 MILES WEST OF SOUTH BEND. SOME CITIES INCLUDED ARE...GARY...MERRILLVILLE...VALPARIASO...LAPORTE AND MICHIGAN CITY. REMEMBER...A WATCH MEANS THAT CONDITIOHNS 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. PRICE
Special weather statement, Jul 7, 5:51 PM EDT, 1 hour 2 minutes before
INZALL-080000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE INDIANAPOLIS IN 445 PM EST SUN JUL 7 1991 A TORNADO WATCH IS IN EFFECT UNTIL 1000 PM EST FOR THE EXTREME NORTHWEST CORNER OF INDIANA. AT 440 PM EST...THERE WERE NO THUNDERSTORMS IN NORTHWEST INDIANA BUT SCATTERED THUNDERSTORMS WERE CONTINUING TO DEVELOP IN NORTHERN ILLINOIS. THESE THUNDERSTORMS EXTENDED FROM CHICAGO TO MARSEILLES. THESE THUNDERSTORMS WERE MOVING EAST AT NEAR 50 MILES AN HOUR. THEY WILL BEGIN TO MOVE INTO NORTHWEST INDIANA BETWEEN 500 AND 600 PM. THESE THUNDERSTORMS MAY CONTAIN BRIEF INTENSE RAIN...WINDS GUSTING TO 60 MILES AN HOUR...LARGE HAIL AND POSSIBLY A TORNADO. USE EXTEME CAUTION WHEN TRAVELING IN NORTHWEST INDIANA TONIGHT. BE ALERT FOR RAIDLY CHANGING WEATHER CONDITIONS. HAINES
The office that day
Everything else NWS Indianapolis, IN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 9:20 AM EDT | Severe Thunderstorm Warning | IND | LaPorte | 40 min |
| Jul 7, 9:32 AM EDT | Severe Thunderstorm Warning | IND | Saint Joseph | 43 min |
| Jul 7, 12:05 PM EDT | Flash Flood Warning | IND | LaPorte | 115 min |
| Jul 7, 7:04 PM EDT | Severe Thunderstorm Warning | IND | LaPorte | 41 min |
| Jul 7, 7:23 PM EDT | Severe Thunderstorm Warning | IND | Saint Joseph | 52 min |
| Jul 7, 7:34 PM EDT | Severe Thunderstorm Warning | IND | Elkhart | 41 min |
| Jul 6, 9:28 PM EDT | Severe Thunderstorm Warning | IND | Berrien | 32 min |
| Jul 6, 10:00 PM EDT | Severe Thunderstorm Warning | IND | Berrien | 15 min |
| Jul 7, 7:19 PM EDT | Tornado Warning | IND | Berrien | 26 min |
| Jul 7, 7:28 PM EDT | Severe Thunderstorm Warning | IND | Saint Joseph | 47 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 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.