Alert archive / Iowa / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 13, NWS La Crosse, WI

April 2, 2007Fayette County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Apr 2, 2007, 10:41 PM CDT for Fayette County, Iowa. It was in force for 34 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 2, 2007, 10:41 PM CDT (03:41 UTC)
Expired
Apr 2, 2007, 11:15 PM CDT
In force
34 min
Issued by
NWS La Crosse, WI
Area
Counties, with a storm outline in the text

County Fayette County, IA

The radar

The La Crosse radar (KARX), 122 km from the middle of the area, began a volume at 03:41 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.

IssuedProductOfficeLasted
Apr 2, 9:22 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.7 hours before the alert went out and 171 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2007-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2007-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1600 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KARX 030341
SVRARX
IAC065-030415-
/O.NEW.KARX.SV.W.0013.070403T0341Z-070403T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1041 PM CDT MON APR 2 2007

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 1115 PM CDT

* AT 1036 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM ALBANY
  TO MAYNARD...OR ALONG A LINE EXTENDING FROM WEST UNION TO
  OELWEIN...AND MOVING NORTHEAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WEST UNION AND OELWEIN AROUND 1040 PM...
  COUNTY ROADS W 42 AND B 40 AND COUNTY ROAD W 45 AND 187 AROUND 1045
  PM...
  ELGIN AND CLERMONT AROUND 1050 PM...
  WADENA AROUND 1055 PM...

FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS AND STAY AWAY FROM WINDOWS.

PLEASE REPORT ANY SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT OFFICE
AND TELL THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4265 9161 4263 9210 4309 9208 4308 9161

$$

MW
2 follow-up statements
000 
WWUS53 KARX 030354
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1053 PM CDT MON APR 2 2007

IAC065-030415-
/O.CON.KARX.SV.W.0013.000000T0000Z-070403T0415Z/
FAYETTE IA-
1053 PM CDT MON APR 2 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR FAYETTE COUNTY...

AT 1049 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL. THIS STORM WAS LOCATED BETWEEN WEST UNION AND ELGIN...MOVING 
NORTHEAST AT 45 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELGIN AT 1055 PM...
  CLERMONT AND MONTAUK HISTORIC SITE AROUND 1100 PM...

TO CALL YOUR SEVERE WEATHER REPORT DIRECTLY INTO THE NATIONAL WEATHER
SERVICE DIAL 6 0 8 7 8 4 7 2 1 4.

LAT...LON 4265 9161 4263 9210 4309 9208 4308 9161

$$

MW
000 
WWUS53 KARX 030409
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1108 PM CDT MON APR 2 2007

IAC065-030418-
/O.EXP.KARX.SV.W.0013.000000T0000Z-070403T0415Z/
FAYETTE IA-
1108 PM CDT MON APR 2 2007

...THE SEVERE THUNDERSTORM WARNING FOR FAYETTE COUNTY EXPIRES AT
1115 PM CDT...

THE STORMS WHICH PROMPTED THIS WARNING HAVE MOVED OUT OF THE WARNED
AREA.

HOWEVER...STRONG STORMS ARE STILL POSSIBLE. THEREFORE...PERSONS ARE 
URGED TO STAY TUNED TO YOUR FAVORITE MEDIA SOURCE FOR THE LATEST 
WEATHER INFORMATION.

IF YOU EXPERIENCED ANY HAIL AS THE STORMS PASSED YOUR LOCATION...YOU 
CAN CALL YOUR REPORT DIRECTLY INTO THE NATIONAL WEATHER SERVICE. 
DIAL 6 0 8 7 8 4 7 2 1 4.

LAT...LON 4265 9161 4263 9210 4309 9208 4308 9161

$$

MW

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 2, 10:36 PM CDTSevere Thunderstorm WarningARXClayton54 min
Apr 3, 2:30 PM CDTWind AdvisoryARXChickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek16 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2007Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.