Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 1613

July 18, 20094 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2009, 1:14 PM MDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 18, 2009, 1:14 PM MDT (19:14 UTC)
Expired
Jul 18, 2009, 3:15 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 48 counties

Huerfano County, CO, Las Animas County, CO, Otero County, CO, Colfax County, NM, Curry County, NM, Harding County, NM, Mora County, NM, Quay County, NM, Roosevelt County, NM, San Miguel County, NM, Union County, NM, Cimarron County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Cottle County, TX, Crosby County, TX, Dallam County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hartley County, TX, Hockley County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Moore County, TX, Motley County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Sherman County, TX, Stonewall County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX

The radar

The Amarillo radar (KAMA), 110 km from the middle of the area, began a volume at 19:16 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

Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 7.2 hours before the alert went out and 350 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, Albuquerq/Krtlnd, NM at 12:00Z on 2009-07-18Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albuquerq/Krtlnd, NM at 12:00Z on 2009-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.193958Sfc1 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
2503 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 6:32 PM MDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Crowley, Kiowa, Kit Carson and 9 more58 min
Jul 18, 2:12 AM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Lincoln, Logan, Morgan, Phillips and 3 more93 min
Jul 18, 1:43 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Crowley, Custer, El Paso, Huerfano and 3 more7 hr
Jul 17, 6:59 PM MDTMesoscale DiscussionSPCChaves, Curry, De Baca, Lea, Roosevelt61 min
Jul 17, 8:44 PM MDTMesoscale DiscussionSPCCurry, Harding, Lea, Quay, Roosevelt, Union61 min
Jul 17, 9:56 PM MDTMesoscale DiscussionSPCLea64 min
Jul 18, 5:20 PM MDTMesoscale DiscussionSPCCurry, Quay, Roosevelt85 min
Jul 17, 10:18 PM MDTSevere Thunderstorm WatchSPCCrane, Crockett, Ector, Glasscock, Loving, Midland and 7 more5 hr

Nearby

Mesoscale Discussions in Texas, 2009Mesoscale Discussions in New Mexico, 2009Mesoscale Discussions in Colorado, 2009Every mesoscale discussion in 2009

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.