Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 607

April 9, 200840 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2008, 6:59 PM CDT for 40 counties in Texas. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2008, 6:59 PM CDT (23:59 UTC)
Expired
Apr 9, 2008, 8:00 PM CDT
In force
61 min
Issued by
the Storm Prediction Center
All 40 counties

Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Erath County, TX, Fisher County, TX, Glasscock County, TX, Hamilton County, TX, Haskell County, TX, Hood County, TX, Howard County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Lampasas County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Reagan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 82 km from the middle of the area, began a volume at 00:03 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 12.0 hours before the alert went out and 223 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, Midland Regional, TX at 12:00Z on 2008-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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, Midland Regional, TX at 12:00Z on 2008-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 580 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
23 J/kg
Mixed-layer CIN
-289 J/kg
Mixed-layer LCL
636 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
580 m²/s²
0-3 km storm-relative helicity
675 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.2

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 100000
SWOMCD
SPC MCD 092359 
TXZ000-100100-

MESOSCALE DISCUSSION 0607
NWS STORM PREDICTION CENTER NORMAN OK
0659 PM CDT WED APR 09 2008

AREAS AFFECTED...SWRN INTO N-CNTRL TX

CONCERNING...TORNADO WATCH 178...

VALID 092359Z - 100100Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 178 CONTINUES.

THE POTENTIAL FOR SUPERCELLS CAPABLE OF ISOLATED
TORNADOES...DAMAGING WINDS AND LARGE HAIL WILL CONTINUE TONIGHT AND
A REPLACEMENT TORNADO WATCH WILL BE REQUIRED PRIOR TO 01Z.

LATEST MESOANALYSIS INDICATED A DEEPENING SURFACE LOW OVER FAR SERN
NM WITH AN ATTENDANT LOW-LEVEL BAROCLINIC ZONE EXTENDING TO JUST S
OF MAF AND THEN MORE NEWD TO N OF MWL AND INTO THE RED RIVER VALLEY
W OF GYI.  A DRYLINE EXTENDED FROM INTERSECTION WITH FRONT S OF MAF
TO W OF 6R6.

LATEST MODEL GUIDANCE SUGGESTS THAT ABOVE-MENTIONED SURFACE LOW WILL
DEVELOP ENEWD INTO W-CNTRL TX BY 10/03Z AND THEN MORE NWD INTO NWRN
TX BY 10/06Z IN RESPONSE TO NEGATIVELY-TILTED MIDLEVEL TROUGH
EJECTING ENEWD ACROSS NM INTO WRN TX.  ATTENDANT LOW-LEVEL
BAROCLINIC ZONE SHOULD LIFT NWD AS WARM FRONT WHILE DRYLINE SURGES
EWD.  AS THIS OCCURS...TSTMS WILL BECOME INCREASINGLY LIKELY ALONG
WARM FRONT AND DRYLINE WITHIN STRONGLY SHEARED KINEMATIC
ENVIRONMENT.  GIVEN THE MODERATE INSTABILITY IN PLACE ACROSS SYSTEM
WARM SECTOR...A CONTINUED THREAT OF SUPERCELLS AND/OR BOWING
STRUCTURES WILL EXIST WITH THE POTENTIAL FOR ISOLATED
TORNADOES...DAMAGING WINDS AND LARGE HAIL.

..MEAD.. 04/09/2008

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

ATTN...WFO...FWD...OUN...SJT...LUB...MAF...

31880196 32590110 33170009 33429916 33819787 33349758
32529766 31799772 31199819 30610022 30330093 30360139
30960181

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 8, 7:33 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 6 more117 min
Apr 8, 8:06 PM CDTMesoscale DiscussionSPCBell, Bosque, Burnet, Coryell, Ellis, Falls and 16 more114 min
Apr 8, 8:48 PM CDTTornado WatchSPCBell, Burnet, Coryell, Falls, Gillespie, Kimble and 11 more2 hr
Apr 8, 10:36 PM CDTMesoscale DiscussionSPCBosque, Bowie, Brown, Camp, Cass, Collin and 34 more84 min
Apr 8, 11:51 PM CDTSevere Thunderstorm WatchSPCBosque, Bowie, Camp, Cass, Collin, Comanche and 39 more5 hr
Apr 9, 3:29 AM CDTMesoscale DiscussionSPCBosque, Bowie, Camp, Cass, Collin, Comanche and 39 more61 min
Apr 9, 6:00 AM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Castro, Childress, Cochran and 22 more60 min
Apr 9, 6:27 AM CDTSevere Thunderstorm WatchSPCAndrews, Armstrong, Bailey, Borden, Briscoe, Carson and 36 more8 hr
Apr 9, 9:06 AM CDTMesoscale DiscussionSPCAndrews, Archer, Armstrong, Bailey, Baylor, Borden and 64 more54 min
Apr 9, 9:35 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Fisher, Foard, Hardeman and 14 more6 hr
Apr 9, 12:24 PM CDTMesoscale DiscussionSPCArcher, Armstrong, Baylor, Briscoe, Carson, Childress and 37 more66 min
Apr 9, 12:46 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 41 more59 min
Apr 9, 1:20 PM CDTTornado Watch PDSSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 40 more7 hr
Apr 9, 3:33 PM CDTMesoscale DiscussionSPCCollin, Cooke, Dallas, Delta, Denton, Ellis and 16 more27 min
Apr 9, 3:48 PM CDTTornado Watch PDSSPCAnderson, Collin, Cooke, Dallas, Delta, Denton and 22 more7 hr
Apr 9, 4:01 PM CDTMesoscale DiscussionSPCCass, Harrison, Marion59 min
Apr 9, 5:12 PM CDTMesoscale DiscussionSPCArcher, Baylor, Bell, Borden, Bosque, Brown and 51 more63 min
Apr 9, 6:12 PM CDTMesoscale DiscussionSPCBriscoe, Childress, Cottle, Crosby, Dickens, Floyd and 13 more63 min
Apr 9, 6:55 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Childress, Clay, Cottle, Dickens and 8 more8 hr

Nearby

Mesoscale Discussions in Texas, 2008Every mesoscale discussion in 2008

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.