Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 615
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2003, 7:22 PM CDT for 35 counties in Texas. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2003, 7:22 PM CDT (00:22 UTC)
- Expired
- Apr 28, 2003, 8:15 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 35 counties
Armstrong County, TX, Borden County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Coke County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Garza County, TX, Glasscock County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Howard County, TX, Hutchinson County, TX, Kent County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Potter County, TX, Randall County, TX, Scurry County, TX, Sterling County, TX, Swisher County, TX, Terry County, TX
The radar
The Lubbock radar (KLBB), 23 km from the middle of the area, began a volume at 00:22 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 nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.4 hours before the alert went out and 181 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.
- Mixed-layer CAPE
- 1022 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1720 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
790 ACUS11 KWNS 290023 SWOMCD SPC MCD 290022 TXZ000-290115- MESOSCALE DISCUSSION 0615 NWS STORM PREDICTION CENTER NORMAN OK 0722 PM CDT MON APR 28 2003 AREAS AFFECTED...WESTERN TX CONCERNING...SEVERE THUNDERSTORM WATCH 176... VALID 290022Z - 290115Z SCATTERED MARGINALLY SEVERE STORMS CONTINUE IN PARTS OF WRN TX. EXPECT ACTIVITY TO GRADUALLY WEAKEN OVER THE SEVERAL HOURS. UNDERNEATH LARGE SPLIT IN MAIN 250MB JET AXIS...DRYLINE ACTIVITY CONTINUES TO MEANDER SLOWLY AROUND PARTS OF WRN TX. RECENT MESOANALYSIS SHOWS A WEAKLY DEFINED / WEAKLY CONVERGENT DRYLINE FROM AROUND AMA SWD TO WEST OF LBB AND MAF INTO SWRN TX. SURFACE TEMPERATURES IN THE LOW-MID 80S AND DEWPOINT VALUES IN THE MID 50S ARE YIELDING 100MB MLCAPES FROM 500-1500 J/KG. ACTIVITY IN THE NW TX PANHANDLE...NEAR AMA...WILL LIKELY BECOME MORE RAIN WRAPPED AND CUTOFF FROM BEST INFLOW OVER THE NEXT HOUR OR SO DESPITE BEING AMIDST A REGION OF STRONGER DEEP LAYER SHEAR / 0-6KM 30-40 KTS /. ACTIVITY IN SOUTH PLAINS INTO THE TRANSPECOS REGION WILL CONTINUE TO EXHIBIT TYPICAL OUTFLOW DOMINANT CHARACTERISTICS FOR THE NEXT FEW HOURS. GIVEN COLD POOL DEVELOPMENT STORMS WILL MAINTAIN THEMSELVES BY PROPAGATING ESEWD INTO THE THETA-E AXIS FROM DEL RIO TO MIDLAND WHERE SURFACE DEWPOINTS ARE IN THE LOWER 60S. OUTFLOW DOMINANT ACTIVITY WILL LIKELY CONTINUE ESEWD WITH A PRIMARY SEVERE THREAT OF STRONG DAMAGING WINDS AND AREAS OF VERY HEAVY RAINFALL. ..NADEN.. 04/29/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SJT...LUB...AMA...MAF... 31500121 31620197 31830237 32480250 34360248 35240251 35590230 35860178 35840090 35540054 33840029 31660038
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 9:20 PM CDT | Mesoscale Discussion | SPC | Bell, Blanco, Bosque, Brown, Burnet, Caldwell and 38 more | 85 min |
| Apr 29, 1:38 PM CDT | Mesoscale Discussion | SPC | Borden, Briscoe, Childress, Coke, Cottle, Crockett and 31 more | 3 hr |
| Apr 29, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Borden, Briscoe, Carson, Childress, Coke and 32 more | 6 hr |
| Apr 29, 5:50 PM CDT | Mesoscale Discussion | SPC | Armstrong, Borden, Briscoe, Childress, Coke, Collingsworth and 40 more | 85 min |
| Apr 29, 6:25 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Borden, Callahan, Childress, Coke and 42 more | 6 hr |
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; radar from the NEXRAD Level II archive.