Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 883
The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 4:58 PM CDT for 17 counties in Texas. It was in force for 32 min.
The area
The outline as issued.
The facts
- Issued
- May 9, 2003, 4:58 PM CDT (21:58 UTC)
- Expired
- May 9, 2003, 5:30 PM CDT
- In force
- 32 min
- Issued by
- the Storm Prediction Center
Counties Callahan County, TX, Coke County, TX, Concho County, TX, Crockett County, TX, Fisher County, TX, Glasscock County, TX, Irion County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX
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, 10.0 hours before the alert went out and 116 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4389 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
294 ACUS11 KWNS 092158 SWOMCD SPC MCD 092158 TXZ000-092230- MESOSCALE DISCUSSION 0883 NWS STORM PREDICTION CENTER NORMAN OK 0458 PM CDT FRI MAY 09 2003 AREAS AFFECTED...SWRN-WRN TX CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 092158Z - 092230Z WW WILL BE ISSUED SOON FOR PORTIONS OF SWRN TO WRN TX. A STRONG TORNADIC SUPERCELL...CURRENTLY OVER ERN PECOS COUNTY... WILL CONTINUE TO BE SEVERE AS IT MOVES EWD INTO A VERY UNSTABLE AIR MASS. VIS IMAGERY ALSO SHOWS ADDITIONAL CU DEVELOPING ALONG THE DRY LINE WHICH EXTENDS FROM THE TRANSPECOS AREA NNEWD THROUGH WRN TX TO NEAR CDS. THIS IS INDICATIVE OF A WEAKENING CAP...WITH CIN LOWERED TO -25 TO -50 J/KG. OBSERVED AND FORECAST DEEP LAYER SHEAR PROFILES SUPPORT SUPERCELLS INTO THE EVENING WITH ADDITIONAL STORMS THAT DEVELOP ALONG THE DRY LINE AND MOVE EWD INTO THE VERY MOIST/UNSTABLE AIR MASS OVER SWRN AND WRN TX. ..PETERS.. 05/09/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FWD...EWX...SJT...MAF... 30420250 31550179 32950106 32479905 30070051
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 8:30 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coleman and 22 more | 60 min |
| May 8, 11:14 PM CDT | Mesoscale Discussion | SPC | Clay, Collin, Cooke, Denton, Eastland, Fannin and 9 more | 91 min |
| May 9, 9:08 AM CDT | Mesoscale Discussion | SPC | Borden, Callahan, Coke, Dickens, Fisher, Foard and 16 more | 3 hr |
| May 9, 2:52 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Haskell, Jack, Montague and 6 more | 113 min |
| May 9, 3:35 PM CDT | Tornado Watch | SPC | Archer, Baylor, Clay, Haskell, Jack, Knox and 6 more | 5 hr |
| May 9, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Callahan, Coke, Crockett, Fisher, Irion, Jones and 10 more | 6 hr |
| May 9, 5:36 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Haskell, Jack, Knox and 7 more | 84 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.