Alert archive / Illinois / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 13, NWS Quad Cities, IA

April 9, 2015Hancock County, McDonough County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 9, 2015, 5:27 PM CDT for Hancock County, McDonough County, Illinois. It was in force for 48 min. 2 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: Apr 9, 2015, 5:27 PM CDT (22:27 UTC)
Expired: Apr 9, 2015, 6:15 PM CDT
In force: 48 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Hancock County, IL, McDonough County, IL

The radar

The Lincoln radar (KILX), 127 km from the middle of the area, began a volume at 22:27 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
Apr 9, 5:30 PM CDT	HAIL 0.88	4 Wsw Macomb, IL
Apr 9, 5:34 PM CDT	HAIL 1	2 Nne Colchester, IL	THE PUBLIC REPORTED HAIL RANGING FROM HALF AN INCH TO AN INCH FROM THE STORM.

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
Apr 9, 12:58 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.5 hours before the alert went out and 138 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: 101 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 323 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

632 
WUUS53 KDVN 092227
SVRDVN
ILC067-109-092315-
/O.NEW.KDVN.SV.W.0013.150409T2227Z-150409T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
527 PM CDT THU APR 9 2015

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN HANCOCK COUNTY IN WEST CENTRAL ILLINOIS...
  MCDONOUGH COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 615 PM CDT

* AT 522 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES WEST OF
  COLMAR...AND MOVING NORTHEAST AT 40 MPH.

  HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...TRAINED WEATHER SPOTTERS. PING PONG SIZED HAIL WAS        
  REPORTED NORTH OF DENVER IN HANCOCK COUNTY.

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL
           DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT
           WIND DAMAGE TO ROOFS...SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE...
  MACOMB...COLMAR...TENNESSEE...FANDON...COLCHESTER...
  BLANDINSVILLE...WESTERN ILLINOIS UNIVERSITY...SCIOTA...GOOD HOPE...
  ADAIR...BARDOLPH...NEW PHILADELPHIA...BUSHNELL...WEBSTER...FOUNTAIN
  GREEN...ARGYLE LAKE STATE PARK...PENNINGTON POINT...MACOMB
  MUNICIPAL AIRPORT...SCOTTSBURG AND WALNUT GROVE.

OTHER LOCATIONS AFFECTED INCLUDE HANCOCK COUNTY FAIRGROUNDS AND
MCDONOUGH COUNTY FAIRGROUNDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4037 9114 4064 9079 4063 9050 4058 9044
      4041 9044 4027 9077 4028 9090 4022 9091
      4020 9094
TIME...MOT...LOC 2226Z 228DEG 36KT 4038 9099

HAIL...1.50IN
WIND...60MPH

$$

GIBBS

2 follow-up statements

013 
WWUS53 KDVN 092248
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
548 PM CDT THU APR 9 2015

ILC067-092258-
/O.CAN.KDVN.SV.W.0013.000000T0000Z-150409T2315Z/
HANCOCK IL-
548 PM CDT THU APR 9 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HANCOCK COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4053 9088 4064 9079 4063 9073 4063 9050
      4058 9044 4041 9044 4035 9061
TIME...MOT...LOC 2248Z 228DEG 36KT 4050 9064

$$

ILC109-092315-
/O.CON.KDVN.SV.W.0013.000000T0000Z-150409T2315Z/
MCDONOUGH IL-
548 PM CDT THU APR 9 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MCDONOUGH
COUNTY UNTIL 615 PM CDT...

AT 546 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MACOMB...AND
MOVING NORTHEAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL.

SOURCE...TRAINED WEATHER SPOTTERS.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
         ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
GOOD HOPE...ADAIR...BARDOLPH...NEW PHILADELPHIA...BUSHNELL...
SCOTTSBURG AND WALNUT GROVE.

OTHER LOCATIONS AFFECTED INCLUDE MCDONOUGH COUNTY FAIRGROUNDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DEADLY CLOUD TO GROUND
LIGHTNING. SEEK SHELTER INSIDE A WELL-BUILT STRUCTURE. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4053 9088 4064 9079 4063 9073 4063 9050
      4058 9044 4041 9044 4035 9061
TIME...MOT...LOC 2248Z 228DEG 36KT 4050 9064

HAIL...1.25IN
WIND...60MPH

$$

GIBBS

565 
WWUS53 KDVN 092311
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
611 PM CDT THU APR 9 2015

ILC109-092322-
/O.EXP.KDVN.SV.W.0013.000000T0000Z-150409T2315Z/
MCDONOUGH IL-
611 PM CDT THU APR 9 2015

...THE SEVERE THUNDERSTORM WARNING FOR MCDONOUGH COUNTY WILL EXPIRE
AT 615 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4053 9088 4064 9079 4063 9073 4063 9050
      4058 9044 4041 9044 4035 9061
TIME...MOT...LOC 2312Z 228DEG 36KT 4066 9040

$$

GIBBS

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 8, 11:13 PM CDT	Special Weather Statement	DVN	Putnam	32 min
Apr 9, 1:08 PM CDT	Special Weather Statement	DVN	Bureau	52 min
Apr 9, 2:57 PM CDT	Special Weather Statement	DVN	Whiteside	18 min
Apr 9, 4:51 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	39 min
Apr 9, 5:49 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	DVN	Carroll, Whiteside	26 min
Apr 9, 6:10 PM CDT	Special Weather Statement	DVN	Mercer	35 min
Apr 9, 6:10 PM CDT	Tornado Warning	DVN	Carroll	20 min
Apr 9, 6:39 PM CDT	Special Weather Statement	DVN	Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more	2 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2015 Every severe thunderstorm warning in 2015

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.