Alert archive / Iowa / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 21, NWS Quad Cities, IA

March 31, 2007Dubuque County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 31, 2007, 5:58 PM CDT for Dubuque County, Iowa. It was in force for 14 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: Mar 31, 2007, 5:58 PM CDT (22:58 UTC)
Expired: Mar 31, 2007, 6:12 PM CDT
In force: 14 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Dubuque County, IA

The radar

The Quad Cities radar (KDVN), 125 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
Mar 31, 5:58 PM CDT	HAIL 1	Epworth, IA

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
Mar 31, 1:47 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 126 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: 843 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 290 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDVN 312258
SVRDVN
IAC061-010000-
/O.NEW.KDVN.SV.W.0021.070331T2258Z-070401T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
558 PM CDT SAT MAR 31 2007

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DUBUQUE COUNTY IN NORTHEAST IOWA...

* UNTIL 700 PM CDT.

* AT 553 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED APPROXIMATELY NEAR EPWORTH...OR ABOUT 14 MILES
  SOUTHWEST OF DUBUQUE...AND MOVING NORTH AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CENTRALIA...BANKSTON...DURANGO...RICKARDSVILLE...HOLY CROSS...
  SHERRILL...OLD BALLTOWN AND BALLTOWN

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

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 4235 9104 4233 9080 4325 9060 4328 9097

$$

JAZ

1 follow-up statement

000 
WWUS53 KDVN 312313
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
612 PM CDT SAT MAR 31 2007

IAC045-163-312330-
/O.CON.KDVN.SV.W.0022.000000T0000Z-070331T2330Z/
CLINTON IA-SCOTT IA-
612 PM CDT SAT MAR 31 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SCOTT AND CLINTON COUNTIES...

AT 610 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
MPH.  THESE STORMS WERE LOCATED APPROXIMATELY ALONG A LINE EXTENDING
FROM LOST NATION TO SCOTT COUNTY PARK...OR ALONG A LINE EXTENDING
FROM 11 MILES SOUTHWEST OF MAQUOKETA TO 10 MILES NORTH OF
BETTENDORF...MOVING NORTHEAST AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DEWITT...MCCAUSLAND...ELWOOD...WELTON...MALONE...DELMAR...
CHARLOTTE...GOOSE LAKE AND BRYANT

THIS INCLUDES INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 291 AND 297.

THIS STORM IS ALSO PRODUCING HEAVY RAIN AND URBAN AND SMALL STREAM
FLOODING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SATURDAY EVENING
FOR EASTERN IOWA. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
MIDNIGHT CDT SUNDAY MORNING FOR NORTHWESTERN ILLINOIS.

LAT...LON 4178 9089 4153 9058 4201 9025 4204 9083

$$
DLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 2:44 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	46 min
Mar 31, 3:12 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan	48 min
Mar 31, 3:20 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	25 min
Mar 31, 3:25 PM CDT	Tornado Warning	DVN	Iowa, Keokuk	35 min
Mar 31, 3:44 PM CDT	Severe Thunderstorm Warning	DVN	Henry	31 min
Mar 31, 3:53 PM CDT	Tornado Warning	DVN	Benton	52 min
Mar 31, 3:58 PM CDT	Flash Flood Warning	DVN	Benton, Buchanan	3 hr
Mar 31, 4:06 PM CDT	Severe Thunderstorm Warning	DVN	Washington	39 min
Mar 31, 4:34 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	26 min
Mar 31, 4:42 PM CDT	Severe Thunderstorm Warning	DVN	Johnson	39 min
Mar 31, 4:45 PM CDT	Severe Thunderstorm Warning	DVN	Linn	30 min
Mar 31, 5:11 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	34 min
Mar 31, 5:19 PM CDT	Severe Thunderstorm Warning	DVN	Delaware	43 min
Mar 31, 5:34 PM CDT	Tornado Warning	DVN	Muscatine, Scott	26 min
Mar 31, 6:00 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	30 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2007 Every severe thunderstorm warning in 2007

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.