Alert archive / Illinois / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 46, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 29, 1986, 12:55 AM CDT for Adams County, Illinois; Marion County, Missouri. It was in force for 45 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 29, 1986, 12:55 AM CDT (05:55 UTC)
- Expired
- Jul 29, 1986, 1:40 AM CDT
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Adams County, IL, Marion County, MO
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 |
|---|---|---|---|
| Jul 29, 1:30 AM CDT | Thunderstorm Wind 87 | Marion, MO | |
| Jul 29, 1:45 AM CDT | Thunderstorm Wind 78 | Marion, MO |
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
Peoria Regional, IL (KPIA), launched 00:00Z, 5.9 hours before the alert went out and 176 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
- 2172 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1200 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.6
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 12:30 AM CDT | Severe Thunderstorm Warning | LSX | Adams | 45 min |
| Jul 29, 1:20 AM CDT | Severe Thunderstorm Warning | LSX | Pike | 40 min |
| Jul 29, 1:20 AM CDT | Severe Thunderstorm Warning | LSX | Brown | 40 min |
| Jul 29, 1:45 AM CDT | Severe Thunderstorm Warning | LSX | Scott | 45 min |
| Jul 29, 2:10 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene | 50 min |
| Jul 29, 2:40 AM CDT | Severe Thunderstorm Warning | LSX | Jersey | 50 min |
| Jul 29, 3:10 AM CDT | Severe Thunderstorm Warning | LSX | Madison | 50 min |
| Jul 28, 11:55 PM CDT | Severe Thunderstorm Warning | LSX | Schuyler, Scotland | 50 min |
| Jul 29, 12:15 AM CDT | Severe Thunderstorm Warning | LSX | Adair, Knox | 45 min |
| Jul 29, 12:15 AM CDT | Severe Thunderstorm Warning | LSX | Clark | 45 min |
| Jul 29, 12:55 AM CDT | Severe Thunderstorm Warning | LSX | Shelby | 45 min |
| Jul 29, 1:20 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 40 min |
| Jul 29, 1:25 AM CDT | Tornado Warning | LSX | Marion | 35 min |
| Jul 29, 2:10 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln | 50 min |
| Jul 29, 2:40 AM CDT | Severe Thunderstorm Warning | LSX | Warren | 50 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1986Severe Thunderstorm Warnings in Missouri, 1986Every severe thunderstorm warning in 1986
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.