Alert archive / Illinois / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Lincoln, IL

May 6, 2012Vermilion County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 6, 2012, 5:00 PM CDT for Vermilion County, Illinois. It was in force for 45 min. 6 reports 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 6, 2012, 5:00 PM CDT (22:00 UTC)
Expired: May 6, 2012, 5:45 PM CDT
In force: 45 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Vermilion County, IL

The radar

The Chicago radar (KLOT), 137 km from the middle of the area, began a volume at 22:02 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 6, 5:06 PM CDT	HAIL 0.88	2 Sw Hoopeston, IL	RELAYED BY EMA
May 6, 5:10 PM CDT	HAIL 2.5	3 W Hoopeston, IL	RELAYED BY EMA
May 6, 5:17 PM CDT	HAIL 1	2 N Rossville, IL	REPORTED 2 MILES SOUTH OF HIGHWAY 9
May 6, 5:24 PM CDT	HAIL 2.5	Hoopeston, IL	RELAYED BY EMA
May 6, 5:30 PM CDT	HAIL 1.75	Hoopeston, IL
May 6, 5:48 PM CDT	TSTM WND DMG	Hoopeston, IL	POWER POLES DOWN NEAR JUNCTION OF HIGHWAYS 1 AND 9.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 6, 1:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.0 hours before the alert went out and 78 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2922 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 576 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

306 
WUUS53 KILX 062200
SVRILX
ILC183-062245-
/O.NEW.KILX.SV.W.0065.120506T2200Z-120506T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
500 PM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN VERMILION COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 545 PM CDT.

* AT 459 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 6 MILES
  WEST OF HOOPESTON...OR 17 MILES EAST OF PAXTON...AND MOVING
  NORTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROSSVILLE AND HOOPESTON.

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 4030 8779 4044 8794 4049 8788 4050 8753
      4038 8753
TIME...MOT...LOC 2200Z 229DEG 15KT 4044 8777
WIND...HAIL 60MPH 1.00IN

$$

BAK

1 follow-up statement

472 
WWUS53 KILX 062213
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
513 PM CDT SUN MAY 6 2012

ILC183-062245-
/O.CON.KILX.SV.W.0065.000000T0000Z-120506T2245Z/
VERMILION IL-
513 PM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
VERMILION COUNTY UNTIL 545 PM CDT...

AT 511 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING LARGE DESTRUCTIVE HAIL UP TO TENNIS BALL SIZE.
THIS STORM WAS LOCATED NEAR HOOPESTON...MOVING NORTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  HOOPESTON.

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 4034 8769 4040 8777 4049 8780 4050 8753
      4038 8753
TIME...MOT...LOC 2213Z 239DEG 16KT 4046 8768
WIND...HAIL <50MPH 2.50IN

$$

BAK

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 6, 2:06 PM CDT	Severe Thunderstorm Warning	ILX	Knox, Peoria, Stark	54 min
May 6, 2:36 PM CDT	Tornado Warning	ILX	Marshall, Stark	39 min
May 6, 3:07 PM CDT	Tornado Warning	ILX	Marshall	53 min
May 6, 3:46 PM CDT	Areal Flood Advisory	ILX	Marshall, Stark	6 hr
May 6, 4:03 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	57 min
May 6, 5:21 PM CDT	Tornado Warning	ILX	Vermilion	39 min
May 6, 6:09 PM CDT	Flash Flood Warning	ILX	Vermilion	6 hr
May 6, 6:48 PM CDT	Special Weather Statement	ILX	Vermilion	27 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2012 Every 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.