Alert archive / Illinois / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 69, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at May 20, 2012, 6:11 PM CDT for Logan County, Mason County, Tazewell County, Illinois. It was in force for 49 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 20, 2012, 6:11 PM CDT (23:11 UTC)
- Expired
- May 20, 2012, 7:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Logan County, IL, Mason County, IL, Tazewell County, IL
The radar
The Lincoln radar (KILX), 34 km from the middle of the area, began a volume at 23:12 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 20, 6:41 PM CDT | HAIL 0.5 | 4 Nw Hopedale, IL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.2 hours before the alert went out and 86 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
- 616 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1773 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -67 m²/s²
- 0-3 km storm-relative helicity
- -55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
512 WUUS53 KILX 202311 SVRILX ILC107-125-179-210000- /O.NEW.KILX.SV.W.0069.120520T2311Z-120521T0000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LINCOLN IL 611 PM CDT SUN MAY 20 2012 THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN LOGAN COUNTY IN CENTRAL ILLINOIS... NORTHEASTERN MASON COUNTY IN CENTRAL ILLINOIS... SOUTHERN TAZEWELL COUNTY IN CENTRAL ILLINOIS... * UNTIL 700 PM CDT. * AT 607 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 5 MILES SOUTHEAST OF MANITO...OR 11 MILES NORTH OF MASON CITY...AND MOVING EAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... GREEN VALLEY...SAN JOSE...DELAVAN...EMDEN...HOPEDALE AND DILLON. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4054 8939 4026 8935 4026 8982 4040 8985 TIME...MOT...LOC 2311Z 260DEG 20KT 4036 8970 WIND...HAIL 60MPH 1.00IN $$ BARNES
2 follow-up statements
603 WWUS53 KILX 202332 SVSILX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN IL 632 PM CDT SUN MAY 20 2012 ILC107-125-179-210000- /O.CON.KILX.SV.W.0069.000000T0000Z-120521T0000Z/ LOGAN IL-MASON IL-TAZEWELL IL- 632 PM CDT SUN MAY 20 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN TAZEWELL...NORTHEASTERN MASON AND NORTHWESTERN LOGAN COUNTIES UNTIL 700 PM CDT... AT 626 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DELAVAN...OR 13 MILES NORTHEAST OF MASON CITY...MOVING EAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... EMDEN...HOPEDALE AND DILLON. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4054 8939 4026 8935 4026 8982 4040 8985 TIME...MOT...LOC 2332Z 260DEG 20KT 4038 8955 WIND...HAIL 60MPH 1.00IN $$ BARNES
768 WWUS53 KILX 202357 SVSILX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN IL 657 PM CDT SUN MAY 20 2012 ILC107-125-179-210008- /O.EXP.KILX.SV.W.0069.000000T0000Z-120521T0000Z/ LOGAN IL-MASON IL-TAZEWELL IL- 657 PM CDT SUN MAY 20 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN TAZEWELL... NORTHEASTERN MASON AND NORTHWESTERN LOGAN COUNTIES WILL EXPIRE AT 700 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. LAT...LON 4054 8939 4026 8935 4026 8982 4040 8985 TIME...MOT...LOC 2358Z 260DEG 20KT 4040 8936 $$ BARNES
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 4:00 PM CDT | Flash Flood Warning | ILX | Effingham | 6 hr |
| May 20, 4:54 PM CDT | Special Weather Statement | ILX | Sangamon | 51 min |
| May 20, 5:04 PM CDT | Special Weather Statement | ILX | Logan | 41 min |
| May 20, 5:36 PM CDT | Special Weather Statement | ILX | Logan | 54 min |
| May 20, 5:38 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Sangamon | 37 min |
| May 20, 5:46 PM CDT | Severe Thunderstorm Warning | ILX | Morgan, Sangamon | 44 min |
| May 20, 6:56 PM CDT | Special Weather Statement | ILX | Champaign | 64 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2012Every severe thunderstorm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.