Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS Paducah, KY

May 6, 2021Johnson County, Massac County, Illinois

NWS Paducah, KY issued this severe thunderstorm warning at May 6, 2021, 5:57 PM CDT for Johnson County, Massac County, Illinois. It was in force for 33 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 6, 2021, 5:57 PM CDT (22:57 UTC)
Expired: May 6, 2021, 6:30 PM CDT
In force: 33 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, IL, Massac County, IL

The radar

The Paducah radar (KPAH), 33 km from the middle of the area, began a volume at 22:57 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, 6:10 PM CDT	HAIL 1	1 Wnw Vienna, IL	NICKEL TO QUARTER SIZE HAIL. TIME ESTIMATED FROM RADAR.

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, 12:38 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.0 hours before the alert went out and 241 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1719 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: -90 m²/s²
0-3 km storm-relative helicity: -71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

993 
WUUS53 KPAH 062257
SVRPAH
ILC087-127-062330-
/O.NEW.KPAH.SV.W.0039.210506T2257Z-210506T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Paducah KY
557 PM CDT Thu May 6 2021

The National Weather Service in Paducah has issued a

* Severe Thunderstorm Warning for...
  Northwestern Massac County in southern Illinois...
  Central Johnson County in southern Illinois...

* Until 630 PM CDT.

* At 557 PM CDT, a severe thunderstorm was located near Vienna,
  moving southeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Vienna, New Columbia and Buncombe. 

This includes Interstate 24 in Illinois between Mile Markers 9 and
27.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3725 8891 3750 8900 3754 8881 3736 8871
      3734 8871 3731 8868
TIME...MOT...LOC 2257Z 334DEG 27KT 3748 8890 

HAIL...1.00IN
WIND...60MPH
 
$$

RJP

1 follow-up statement

598 
WWUS53 KPAH 062315
SVSPAH

Severe Weather Statement
National Weather Service Paducah KY
615 PM CDT Thu May 6 2021

ILC087-127-062330-
/O.CON.KPAH.SV.W.0039.000000T0000Z-210506T2330Z/
Massac IL-Johnson IL-
615 PM CDT Thu May 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHWESTERN MASSAC AND SOUTHEASTERN JOHNSON COUNTIES...

At 614 PM CDT, a severe thunderstorm was located over Vienna, moving
south at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Vienna and New Columbia. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3725 8891 3741 8896 3744 8884 3730 8872
TIME...MOT...LOC 2314Z 337DEG 25KT 3737 8887 

HAIL...1.00IN
WIND...60MPH
 
$$

RJP

The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 6, 12:26 PM CDT	Special Weather Statement	PAH	Jackson, Jefferson, Perry	49 min
May 6, 1:13 PM CDT	Severe Thunderstorm Warning	PAH	Alexander	47 min
May 6, 2:05 PM CDT	Special Weather Statement	PAH	Edwards, Gallatin, Wabash, White	40 min
May 6, 3:40 PM CDT	Special Weather Statement	PAH	Jefferson	50 min
May 6, 3:52 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	38 min
May 6, 4:31 PM CDT	Special Weather Statement	PAH	Franklin, Hamilton, Wayne	44 min
May 6, 4:54 PM CDT	Tornado Warning	PAH	Wayne	36 min
May 6, 5:18 PM CDT	Special Weather Statement	PAH	Gallatin, Johnson, Saline, Union, Williamson	42 min
May 6, 5:27 PM CDT	Severe Thunderstorm Warning	PAH	Johnson, Pope, Saline, Williamson	38 min
May 6, 6:12 PM CDT	Special Weather Statement	PAH	Pope	33 min
May 6, 6:32 PM CDT	Special Weather Statement	PAH	Massac	28 min
May 6, 6:47 PM CDT	Special Weather Statement	PAH	Massac	43 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2021 Every severe thunderstorm warning in 2021

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.