Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 445

April 8, 2003Dimmit County, La Salle County, Webb County, Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2003, 2:08 AM CDT for Dimmit County, La Salle County, Webb County, Texas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Apr 8, 2003, 2:08 AM CDT (07:08 UTC)
Expired
Apr 8, 2003, 3:15 AM CDT
In force
67 min
Issued by
the Storm Prediction Center

Counties Dimmit County, TX, La Salle County, TX, Webb County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 7.1 hours before the alert went out and 169 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, Del Rio, TX at 00:00Z on 2003-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1447 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2003-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.1939587897Sfc1 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
1447 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1863 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
20 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.

184 
ACUS11 KWNS 080709
SWOMCD
SPC MCD 080708 
TXZ000-080815-

MESOSCALE DISCUSSION 0445
NWS STORM PREDICTION CENTER NORMAN OK
0208 AM CDT TUE APR 08 2003

AREAS AFFECTED...LWR RIO GRANDE VALLEY

CONCERNING...SEVERE THUNDERSTORM WATCH 116...

VALID 080708Z - 080815Z

NEW WW IS NOT ANTICIPATED.

ISOLATED INTENSE CONVECTIVE DEVELOPMENT PERSISTS ALONG/JUST NORTH
OF SURFACE COLD FRONT NOSING SOUTHWARD THROUGH THE LOWER RIO
GRANDE VALLEY.	ACTIVITY WILL CONTINUE PROPAGATING SOUTHWARD
THROUGH AREAS NEAR/ WEST OF COTULLA DURING THE NEXT HOUR OR
SO...BUT IN AREAS FARTHER TO THE SOUTH...STORMS MAY DIMINISH IN
MORE STRONGLY CAPPED ENVIRONMENT.

..KERR.. 04/08/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CRP...EWX...

28440029 28519952 28639929 28109892 27679933

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 7, 7:29 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bee, Bexar, Blanco, Caldwell and 21 more2 hr
Apr 7, 9:45 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bee, Bexar, Comal, Dimmit, Frio and 12 more5 hr
Apr 7, 11:36 PM CDTMesoscale DiscussionSPCAtascosa, Dimmit, Frio, Kinney, La Salle, Live Oak and 5 more114 min

Nearby

Mesoscale Discussions in Texas, 2003Every mesoscale discussion in 2003

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.