Alert archive / Texas / Mesoscale Discussions in 2021
Mesoscale Discussion 170
The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2021, 6:21 PM CST for 19 counties in Texas. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2021, 6:21 PM CST (00:21 UTC)
- Expired
- Mar 13, 2021, 8:15 PM CST
- In force
- 114 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 21
Counties Borden County, TX, Coke County, TX, Crane County, TX, Crockett County, TX, Fisher County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Scurry County, TX, Sterling County, TX, Terrell County, TX, Upton County, TX
The radar
The Midland/Odessa radar (KMAF), 74 km from the middle of the area, began a volume at 00:21 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
Midland Regional, TX (KMAF), launched 00:00Z, 0.4 hours before the alert went out and 75 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
- 3140 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- 380 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
621 ACUS11 KWNS 140021 SWOMCD SPC MCD 140021 TXZ000-140215- Mesoscale Discussion 0170 NWS Storm Prediction Center Norman OK 0621 PM CST Sat Mar 13 2021 Areas affected...West TX Concerning...Tornado Watch 21... Valid 140021Z - 140215Z The severe weather threat for Tornado Watch 21 continues. SUMMARY...Severe threat will progress across the remainder of ww021 over the next 2-3 hours. DISCUSSION...Latest satellite imagery depicts a well-defined upper trough over western NM with the leading edge of strong forcing beginning to influence the back edge of ongoing convection. Broken band of storms that currently extends from Scurry-Glasscock-Pecos County will likely be supported enough to migrate east-northeast across the remainder of ww021 later this evening. While embedded supercells could produce a few tornadoes, it appears hail/wind may be the primary severe threats as the primary storm mode transitions away from supercells, in response to the approaching trough. ..Darrow.. 03/14/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...EWX...SJT...LUB...MAF... LAT...LON 30170347 33030146 33039957 30180164 30170347
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 8:42 PM CST | Mesoscale Discussion | SPC | Armstrong, Borden, Briscoe, Carson, Childress, Coke and 37 more | 93 min |
Nearby
Mesoscale Discussions in Texas, 2021Every mesoscale discussion in 2021
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.