Alert archive / Texas / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 253

May 19, 20017 counties in Oklahoma; 15 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 19, 2001, 10:00 PM CDT for 7 counties in Oklahoma; 15 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 19, 2001, 10:00 PM CDT (03:00 UTC)
Expired
May 20, 2001, 3:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 22 counties

Bryan County, OK, Carter County, OK, Choctaw County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, Collin County, TX, Cooke County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Montague County, TX, Morris County, TX, Red River County, TX, Titus County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 157 km from the middle of the area, began a volume at 03:01 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

Fort Worth, TX (KFWD), launched 00:00Z, 3.0 hours before the alert went out and 132 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, Fort Worth, TX at 00:00Z on 2001-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2204 joules per kilogram.LCLLFCEL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 2001-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.19395878Sfc1 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
2204 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1065 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 3:30 PM CDTTornado WatchSPCAdair, Atoka, Carter, Cherokee, Choctaw, Cleveland and 27 more6 hr
May 20, 5:00 PM CDTSevere Thunderstorm WatchSPCCraig, Delaware, Kay, Mayes, Noble, Nowata and 7 more4 hr

Nearby

Severe Thunderstorm Watches in Texas, 2001Severe Thunderstorm Watches in Oklahoma, 2001Every severe thunderstorm watch in 2001

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.