Alert archive / Illinois / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 21, NWS Quad Cities, IA

April 5, 2010Carroll County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 5, 2010, 11:58 PM CDT for Carroll County, Illinois. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 5, 2010, 11:58 PM CDT (04:58 UTC)
Expired: Apr 6, 2010, 12:22 AM CDT
In force: 24 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

County Carroll County, IL

The radar

The Quad Cities radar (KDVN), 78 km from the middle of the area, began a volume at 04:58 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.

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 5, 11:07 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.0 hours before the alert went out and 72 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: 1762 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 323 m²/s²
0-3 km storm-relative helicity: 584 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

149 
WUUS53 KDVN 060458
SVRDVN
ILC015-060600-
/O.NEW.KDVN.SV.W.0021.100406T0458Z-100406T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1158 PM CDT MON APR 5 2010

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CARROLL COUNTY IN NORTHWEST ILLINOIS...

* UNTIL 100 AM CDT.

* AT 1153 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED APPROXIMATELY NEAR ARGO
  FAY...OR NEAR MOUNT CARROLL...AND MOVING EAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LANARK...MILLEDGEVILLE AND SHANNON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A VERY DANGEROUS STORM CAPABLE OF BLOWING DOWN TREES AND
POWER POLES. MOVE INDOORS TO A SUBSTANTIAL SHELTER SUCH AS A BASEMENT
OR INTERIOR ROOM OR HALLWAY.

&&

LAT...LON 4193 8982 4193 9005 4220 9003 4220 8969
      4198 8969 4197 8968 4193 8969
TIME...MOT...LOC 0458Z 271DEG 53KT 4202 8990
WIND...HAIL 70MPH <1.00IN

$$

DLF

2 follow-up statements

326 
WWUS53 KDVN 060510
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1210 AM CDT TUE APR 6 2010

ILC015-060600-
/O.CON.KDVN.SV.W.0021.000000T0000Z-100406T0600Z/
CARROLL IL-
1210 AM CDT TUE APR 6 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR EASTERN CARROLL COUNTY...

AT 1207 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED APPROXIMATELY NEAR HITT...
OR 14 MILES EAST OF MOUNT CARROLL...MOVING EAST AT 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM CDT
TUESDAY MORNING FOR EAST CENTRAL IOWA AND NORTHWEST ILLINOIS.

&&

LAT...LON 4194 8974 4193 8975 4193 8988 4220 8983
      4220 8969 4219 8969 4193 8969
TIME...MOT...LOC 0510Z 271DEG 53KT 4202 8966
WIND...HAIL 60MPH <1.00IN

$$

765 
WWUS53 KDVN 060522
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1222 AM CDT TUE APR 6 2010

ILC015-060532-
/O.CAN.KDVN.SV.W.0021.000000T0000Z-100406T0600Z/
CARROLL IL-
1222 AM CDT TUE APR 6 2010

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CARROLL COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER 
HAS MOVED OUT OF THE WARNED AREA. THEREFORE THE SEVERE THUNDERSTORM 
WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM CDT 
TUESDAY MORNING FOR EAST CENTRAL IOWA AND NORTHWEST ILLINOIS.

LAT...LON 4194 8974 4193 8975 4193 8988 4220 8983
      4220 8969 4219 8969 4193 8969
TIME...MOT...LOC 0522Z 271DEG 53KT 4202 8942

$$

DLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 8:42 PM CDT	Severe Thunderstorm Warning	DVN	Carroll	19 min
Apr 5, 10:14 PM CDT	Special Weather Statement	DVN	Jo Daviess	61 min
Apr 5, 10:58 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	62 min
Apr 5, 11:13 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess	47 min
Apr 5, 11:36 PM CDT	Severe Thunderstorm Warning	DVN	Stephenson	39 min
Apr 6, 5:05 AM CDT	Special Weather Statement	DVN	Whiteside	55 min
Apr 6, 5:17 AM CDT	Severe Thunderstorm Warning	DVN	Rock Island, Whiteside	28 min
Apr 6, 5:44 AM CDT	Severe Thunderstorm Warning	DVN	Carroll, Whiteside	31 min
Apr 6, 6:01 AM CDT	Severe Thunderstorm Warning	DVN	Stephenson	14 min
Apr 6, 12:37 PM CDT	River Flood Warning	DVN	Rock Island	22 hr
Apr 6, 12:37 PM CDT	River Flood Warning	DVN	Mercer, Rock Island	22 hr
Apr 6, 12:37 PM CDT	River Flood Warning	DVN	Mercer, Rock Island	47 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2010 Every severe thunderstorm warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.