Alert archive / Illinois / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 13, NWS Quad Cities, IA

March 30, 2005Stephenson County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 30, 2005, 3:39 PM CST for Stephenson County, Illinois. It was in force for 66 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: Mar 30, 2005, 3:39 PM CST (21:39 UTC)
Expired: Mar 30, 2005, 4:45 PM CST
In force: 66 min
Issued by: NWS Quad Cities, IA
Area: Counties, with a storm outline in the text

County Stephenson County, IL

The radar

The Quad Cities radar (KDVN), 112 km from the middle of the area, began a volume at 21:39 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
Mar 30, 11:05 AM CST	Tornado Watch	SPC	5 hr
Mar 30, 2:15 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.7 hours before the alert went out and 107 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: 1316 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 316 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KDVN 302140
SVRDVN
ILC177-302245-
/O.NEW.KDVN.SV.W.0013.050330T2139Z-050330T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
339 PM CST WED MAR 30 2005

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN STEPHENSON COUNTY IN NORTHWEST ILLINOIS
  THIS INCLUDES THE CITY OF FREEPORT

* UNTIL 445 PM CST

* AT 334 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 7 MILES SOUTH OF FREEPORT TO 13
  MILES SOUTHWEST OF GERMAN VALLEY...OR ALONG A LINE EXTENDING FROM 7
  MILES SOUTH OF FREEPORT TO 12 MILES WEST OF MOUNT MORRIS...AND 
  MOVING NORTHEAST AT 35 MPH. POWER LINES WERE REPORTED DOWN NEAR 
  SHANNON ILLINOIS...IN CARROLL COUNTY.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FREEPORT BY 345 PM CST
  GERMAN VALLEY BY 355 PM CST
  RIDOTT AND DAKOTA BY 400 PM CST
  ROCK CITY BY 410 PM CST
  DAVIS BY 415 PM CST

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.

LAT...LON 4224 8972 4195 8967 4222 8939 4251 8937
      4252 8952

$$

JAZ

2 follow-up statements

000 
WWUS53 KDVN 302155
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
355 PM CST WED MAR 30 2005

ILC177-302245-
/O.CON.KDVN.SV.W.0013.000000T0000Z-050330T2245Z/
STEPHENSON IL-
355 PM CST WED MAR 30 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 445 PM CST FOR
EASTERN STEPHENSON COUNTY...

AT 352 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR RIDOTT CORNERS...OR ABOUT 6 MILES EAST OF FREEPORT...
MOVING NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FREEPORT ALBERTUS AIRPORT AND OAKDALE NATURE PRESERVE BY 345 PM CST
  GERMAN VALLEY BY 350 PM CST
  RIDOTT AND RIDOTT CORNERS BY 355 PM CST
  WINNESHIEK BY 400 PM CST
  LOST LAKE BY 405 PM CST
  DAVIS AND ROCK CITY BY 410 PM CST

LAT...LON 4224 8972 4195 8967 4222 8939 4251 8937
      4252 8952

$$

JAZ

000 
WWUS53 KDVN 302205
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
405 PM CST WED MAR 30 2005

ILC177-302215-
/O.CAN.KDVN.SV.W.0013.000000T0000Z-050330T2245Z/
STEPHENSON IL-
405 PM CST WED MAR 30 2005

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

THE THUNDERSTORM THAT WAS CAPABLE OF PRODUCING SEVERE WEATHER HAS 
WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN 
CANCELLED.

LAT...LON 4224 8972 4195 8967 4222 8939 4251 8937
      4252 8952

$$

JAZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 11:41 AM CST	Severe Thunderstorm Warning	DVN	Jo Daviess	49 min
Mar 30, 1:45 PM CST	Severe Thunderstorm Warning	DVN	Mercer, Rock Island	30 min
Mar 30, 2:15 PM CST	Severe Thunderstorm Warning	DVN	Henry, Rock Island, Whiteside	45 min
Mar 30, 2:20 PM CST	Severe Thunderstorm Warning	DVN	Bureau, Putnam	40 min
Mar 30, 2:50 PM CST	Severe Thunderstorm Warning	DVN	Carroll, Whiteside	55 min
Mar 30, 3:19 PM CST	Severe Thunderstorm Warning	DVN	Bureau	26 min
Mar 30, 5:52 PM CST	Severe Thunderstorm Warning	DVN	Putnam	24 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2005 Every severe thunderstorm warning in 2005

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.