Alert archive / Iowa / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 13, NWS Quad Cities, IA

April 3, 2011Dubuque County, Jackson County, Jones County, Iowa; Jo Daviess County, Stephenson County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 3, 2011, 8:07 PM CDT for Dubuque County, Jackson County, Jones County, Iowa; Jo Daviess County, Stephenson County, Illinois. It was in force for 29 min. 10 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 3, 2011, 8:07 PM CDT (01:07 UTC)
Expired: Apr 3, 2011, 8:36 PM CDT
In force: 29 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 58.0 mph

Counties Dubuque County, IA, Jackson County, IA, Jones County, IA, Jo Daviess County, IL, Stephenson County, IL

The radar

The Quad Cities radar (KDVN), 99 km from the middle of the area, began a volume at 01:09 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 3, 8:16 PM CDT	HAIL 1.75	4 Sw Dubuque, IA	OCCURRING IN SWISS VALLEY RIGHT NOW.
Apr 3, 8:19 PM CDT	HAIL 1.75	Dubuque, IA	SOUTH SIDE OF DUBUQUE
Apr 3, 8:21 PM CDT	HAIL 0.88	Se Dubuque, IA
Apr 3, 8:21 PM CDT	HAIL 1	4 Wnw Dubuque, IA
Apr 3, 8:21 PM CDT	HAIL 1.75	1 Sse Dubuque, IA	QUARTER TO GOLF BALL SIZE HAIL FALLING.
Apr 3, 8:21 PM CDT	HAIL 2	1 Ene Dubuque, IA	1 TO 2 INCH HAIL
Apr 3, 8:23 PM CDT	HAIL 1.75	Dubuque, IA	OCCURRING RIGHT NOW AT CLARK UNIVERSITY.
Apr 3, 8:24 PM CDT	HAIL 1	1 N Dubuque, IA	OCCURRING RIGHT NOW.
Apr 3, 8:29 PM CDT	HAIL 3	1 Ne Dubuque, IA
Apr 3, 8:30 PM CDT	HAIL 3	1 Ene Dubuque, IA	3 TO 3.5 INCH HAIL. STREETS FILED WITH HAIL.

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 3, 5:57 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.1 hours before the alert went out and 98 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: 1790 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1684 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

426 
WUUS53 KDVN 040107
SVRDVN
IAC061-097-105-ILC085-177-040215-
/O.NEW.KDVN.SV.W.0013.110404T0107Z-110404T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
807 PM CDT SUN APR 3 2011

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN JACKSON COUNTY IN EAST CENTRAL IOWA...
  NORTHEASTERN JONES COUNTY IN EAST CENTRAL IOWA...
  EASTERN DUBUQUE COUNTY IN NORTHEAST IOWA...
  NORTHERN JO DAVIESS COUNTY IN NORTHWEST ILLINOIS...
  NORTHWESTERN STEPHENSON COUNTY IN NORTHWEST ILLINOIS...

* UNTIL 915 PM CDT.

* AT 804 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED APPROXIMATELY NEAR BERNARD...OR 16 MILES
  SOUTHWEST OF DUBUQUE...AND MOVING EAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PEOSTA...CENTRALIA...ZWINGLE...DUBUQUE REGIONAL AIRPORT...ASBURY...
  DURANGO...LA MOTTE...SAGEVILLE...EAST DUBUQUE...ST. DONATUS...
  MENOMINEE...GALENA...COUNCIL HILL...SCALES MOUND...SCHAPVILLE...
  APPLE RIVER...WARREN...NORA AND WINSLOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. MOVE IMMEDIATELY INDOORS AND STAY AWAY
FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT MONDAY MORNING
FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.

&&

LAT...LON 4263 9070 4251 9063 4251 8988 4247 8962
      4223 9092 4240 9101 4263 9073
TIME...MOT...LOC 0108Z 250DEG 47KT 4235 9083
WIND...HAIL <58MPH 1.00IN

$$

NICHOLS

2 follow-up statements

586 
WWUS53 KDVN 040120
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
820 PM CDT SUN APR 3 2011

IAC061-097-105-ILC085-177-040215-
/O.CON.KDVN.SV.W.0013.000000T0000Z-110404T0215Z/
JACKSON IA-DUBUQUE IA-JONES IA-JO DAVIESS IL-STEPHENSON IL-
820 PM CDT SUN APR 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR NORTHWESTERN STEPHENSON...NORTHERN JO DAVIESS...NORTHEASTERN
JONES...DUBUQUE AND NORTHWESTERN JACKSON COUNTIES...

AT 817 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL
SIZE HAIL.  THIS STORM WAS LOCATED APPROXIMATELY NEAR DUBUQUE
REGIONAL AIRPORT...OR 8 MILES SOUTH OF DUBUQUE...MOVING EAST AT 55 
MPH.  GOLF BALL HAIL WAS REPORTED 4 MILES SW OF DUBUQUE AT 816 PM 
CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
EDMORE...EAST DUBUQUE...MASSEY...ST. DONATUS...MENOMINEE...SMITHS...
AIKEN...RICE...GALENA...GALENA TERRITORY...COUNCIL HILL...GUILFORD...
SCALES MOUND...SCHAPVILLE...APPLE CANYON LAKE...APPLE RIVER...APPLE
RIVER CANYON STATE PARK...WARREN...NORA...WINSLOW AND ORANGEVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT MONDAY MORNING
FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.

&&

LAT...LON 4263 9070 4251 9063 4251 8988 4247 8962
      4223 9092 4240 9101 4263 9073
TIME...MOT...LOC 0120Z 250DEG 47KT 4240 9063
WIND...HAIL <58MPH 1.50IN

$$

859 
WWUS53 KDVN 040136
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
836 PM CDT SUN APR 3 2011

IAC061-097-105-ILC085-177-040145-
/O.CAN.KDVN.SV.W.0013.000000T0000Z-110404T0215Z/
JACKSON IA-DUBUQUE IA-JONES IA-JO DAVIESS IL-STEPHENSON IL-
836 PM CDT SUN APR 3 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN STEPHENSON...
NORTHERN JO DAVIESS...NORTHEASTERN JONES...DUBUQUE AND NORTHWESTERN
JACKSON COUNTIES IS CANCELLED...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT MONDAY MORNING 
FOR EASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.

LAT...LON 4263 9070 4251 9063 4251 8988 4247 8962
      4223 9092 4240 9101 4263 9073
TIME...MOT...LOC 0135Z 250DEG 47KT 4247 9038

$$

NICHOLS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 7:13 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Keokuk, Washington	51 min
Apr 3, 7:24 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque	21 min
Apr 3, 7:59 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Henry, Jefferson, Johnson, Louisa, Muscatine and 1 more	34 min
Apr 3, 8:28 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa, Muscatine, Scott	46 min
Apr 3, 8:51 PM CDT	Severe Thunderstorm Warning	DVN	Scott	54 min
Apr 3, 9:36 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Lee	38 min
Apr 4, 11:58 AM CDT	Wind Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	6 hr
Apr 3, 9:02 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Whiteside	13 min
Apr 3, 9:58 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	32 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2011 Severe Thunderstorm Warnings in Illinois, 2011 Every severe thunderstorm warning in 2011

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.