Alert archive / Alabama / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 13, NWS Mobile, AL

April 7, 2004Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 7, 2004, 10:18 PM CDT for Washington County, Alabama. It was in force for 42 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 7, 2004, 10:18 PM CDT (03:18 UTC)
Expired: Apr 7, 2004, 11:00 PM CDT
In force: 42 min
Issued by: NWS Mobile, AL
Area: Counties, with a storm outline in the text

County Washington County, AL

The radar

The Mobile radar (KMOB), 106 km from the middle of the area, began a volume at 03:17 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 7, 6:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 3.3 hours before the alert went out and 183 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: 1040 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 1446 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 080318
SVRMOB
ALC129-080400-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1017 PM CDT WED APR 7 2004

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN SOUTHWEST ALABAMA

* UNTIL 1100 PM CDT

* AT 1012 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND    
  DAMAGING WINDS AROUND 60 MPH.  THIS STORM WAS LOCATED 8 MILES      
  NORTHWEST OF HEALING SPRINGS...OR ABOUT 11 MILES EAST OF           
  WAYNESBORO...AND MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HEALING SPRINGS BY 1035 PM CDT
  MILLRY BY 1040 PM CDT
  KOENTON AND LOPER BY 1045 PM CDT
  YARBO BY 1050 PM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING.
TAKE COVER IN A STURDY SHELTER UNTIL THE STORM HAS PASSED.

LAT...LON 3171 8846 3155 8846 3147 8810 3169 8810

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 7:04 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	26 min
Apr 7, 8:45 PM CDT	Special Marine Warning	MOB		90 min
Apr 7, 9:33 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	42 min
Apr 7, 11:11 PM CDT	Special Marine Warning	MOB		79 min
Apr 8, 8:34 AM CDT	Severe Thunderstorm Warning	MOB	Butler	41 min
Apr 8, 8:46 AM CDT	Severe Thunderstorm Warning	MOB	Conecuh	29 min
Apr 8, 9:06 AM CDT	Severe Thunderstorm Warning	MOB	Covington	39 min
Apr 8, 9:48 AM CDT	Severe Thunderstorm Warning	MOB	Covington	12 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2004 Every severe thunderstorm warning in 2004

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.