Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 415, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 18, 2021, 5:27 PM CDT for Archer County, Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2021, 5:27 PM CDT (22:27 UTC)
- Expired
- Jul 18, 2021, 6:00 PM CDT
- In force
- 33 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Archer County, TX
The radar
The Altus AFB radar (KFDR), 88 km from the middle of the area, began a volume at 22:30 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 12:00Z, 10.5 hours before the alert went out and 161 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
- 241 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 1347 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
007
WUUS54 KOUN 182227
SVROUN
TXC009-182300-
/O.NEW.KOUN.SV.W.0415.210718T2227Z-210718T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
527 PM CDT Sun Jul 18 2021
The National Weather Service in Norman has issued a
* Severe Thunderstorm Warning for...
Southwestern Archer County in northern Texas...
* Until 600 PM CDT.
* At 527 PM CDT, severe thunderstorms were located along a line
extending from 5 miles east of Lake Kickapoo to 7 miles west of
Archer City, and are nearly stationary.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Lake Kickapoo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3367 9884 3342 9887 3345 9865 3372 9864
TIME...MOT...LOC 2227Z 023DEG 3KT 3365 9873 3357 9875
HAIL...1.00IN
WIND...60MPH
$$
..speg.1 follow-up statement
239
WWUS54 KOUN 182305
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
605 PM CDT Sun Jul 18 2021
TXC009-182315-
/O.EXP.KOUN.SV.W.0415.000000T0000Z-210718T2300Z/
Archer TX-
605 PM CDT Sun Jul 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ARCHER COUNTY HAS
EXPIRED...
The storms which prompted the warning have weakened below severe
limits, therefore the warning has been allowed to expire. However
gusty winds are still possible with these thunderstorms.
LAT...LON 3367 9884 3342 9887 3345 9865 3372 9864
TIME...MOT...LOC 2305Z 023DEG 3KT 3362 9874 3354 9876
$$
..speg.The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 7:12 PM CDT | Areal Flood Advisory | OUN | Archer, Clay, Wichita | 3 hr |
| Jul 17, 7:41 PM CDT | Special Weather Statement | OUN | Wilbarger | 49 min |
| Jul 17, 9:17 PM CDT | Special Weather Statement | OUN | Knox | 28 min |
| Jul 18, 5:19 PM CDT | Special Weather Statement | OUN | Archer | 26 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning 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.