Alert archive / Texas / Tornado Watches in 2020

Tornado Watch 49

March 13, 20206 counties in New Mexico; 17 counties in Texas

The Storm Prediction Center issued this tornado watch at Mar 13, 2020, 2:24 PM MDT for 6 counties in New Mexico; 17 counties in Texas. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Mar 13, 2020, 2:24 PM MDT (20:24 UTC)
Expired
Mar 13, 2020, 11:00 PM MDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 23 counties

Chaves County, NM, De Baca County, NM, Eddy County, NM, Lea County, NM, Lincoln County, NM, Otero County, NM, Andrews County, TX, Crane County, TX, Crockett County, TX, Culberson County, TX, Ector County, TX, Hudspeth County, TX, Irion County, TX, Jeff Davis County, TX, Loving County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, Reeves County, TX, Terrell County, TX, Upton County, TX, Ward County, TX, Winkler County, TX

The radar

The Midland/Odessa radar (KMAF), 105 km from the middle of the area, began a volume at 20:24 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
60%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
70%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 13, 2:58 PM MDTSevere Thunderstorm WarningEPZOtero47 min
Mar 13, 3:05 PM MDTSevere Thunderstorm WarningEPZOtero40 min
Mar 13, 3:54 PM MDTSevere Thunderstorm WarningEPZOtero16 min
Mar 13, 5:04 PM MDTTornado WarningABQDe Baca26 min
Mar 13, 5:20 PM MDTTornado WarningABQChaves, De Baca, Roosevelt12 min
Mar 13, 5:34 PM MDTSevere Thunderstorm WarningEPZOtero41 min
Mar 13, 6:11 PM MDTSevere Thunderstorm WarningMAFCulberson, Loving, Reeves49 min
Mar 13, 6:13 PM MDTSevere Thunderstorm WarningEPZOtero47 min
Mar 13, 6:37 PM MDTSevere Thunderstorm WarningMAFReeves23 min
Mar 13, 6:54 PM MDTSevere Thunderstorm WarningMAFLoving, Reeves, Ward51 min
Mar 13, 7:01 PM MDTTornado Warning Tornado observedMAFLoving, Reeves, Ward29 min
Mar 13, 7:02 PM MDTSevere Thunderstorm WarningMAFReeves, Ward, Winkler28 min
Mar 13, 7:24 PM MDTTornado Warning Tornado observedMAFWard36 min
Mar 13, 7:33 PM MDTSevere Thunderstorm WarningMAFLoving, Winkler42 min
Mar 13, 7:49 PM MDTTornado WarningMAFWard, Winkler26 min
Mar 13, 8:15 PM MDTTornado WarningMAFCrane, Ector, Ward, Winkler45 min
Mar 13, 8:38 PM MDTTornado WarningMAFCrane, Ector37 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 8.4 hours before the alert went out and 105 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 2020-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 2020-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -117 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1338 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
-117 m²/s²
0-3 km storm-relative helicity
230 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

522 
WWUS20 KWNS 132022
SEL9  
SPC WW 132022
NMZ000-TXZ000-140300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 49
NWS Storm Prediction Center Norman OK
325 PM CDT Fri Mar 13 2020

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southeast New Mexico
  Far West Texas

* Effective this Friday afternoon and evening from 325 PM until
  1000 PM CDT.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Scattered large hail and isolated very large hail events to 3
    inches in diameter likely
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...Scattered supercells should develop off the higher terrain
of Far West Texas and southeast New Mexico into early evening. Large
hail, some significant, and a few tornadoes are the primary hazards,
particularly across the Pecos Valley.

The tornado watch area is approximately along and 85 statute miles
north and south of a line from 65 miles northeast of Dryden TX to 60
miles west southwest of Roswell NM. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU9).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24040.

...Grams

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 13, 12:49 PM MDTMesoscale DiscussionSPCChaves, Eddy, Lea116 min
Mar 13, 4:26 PM MDTMesoscale DiscussionSPCChaves, De Baca, Eddy, Lea, Lincoln, Otero and 1 more2 hr

Nearby

Tornado Watches in Texas, 2020Tornado Watches in New Mexico, 2020Every tornado watch in 2020

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.