Alert archive / Texas / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 17, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Mar 17, 2020, 2:08 PM CDT for Knox County, Texas. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 17, 2020, 2:08 PM CDT (19:08 UTC)
- Expired
- Mar 17, 2020, 3:00 PM CDT
- In force
- 52 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Knox County, TX
The radar
The Altus AFB radar (KFDR), 110 km from the middle of the area, began a volume at 19:07 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 17, 1:02 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 7.1 hours before the alert went out and 255 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
- 201 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 554 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 246 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 17, 1:34 PM CDT, 34 minutes earlier.
Area forecast discussion, Mar 17, 1:34 PM CDT, 34 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 2:11 PM CDT | River Flood Warning | OUN | Atoka | 5 days |
| Mar 17, 3:02 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 43 min |
| Mar 17, 3:50 PM CDT | Special Weather Statement | OUN | Baylor | 25 min |
| Mar 17, 4:13 PM CDT | Severe Thunderstorm Warning | OUN | Baylor | 47 min |
| Mar 17, 4:56 PM CDT | Areal Flood Advisory | OUN | Baylor | 2 hr |
| Mar 17, 5:58 PM CDT | Special Weather Statement | OUN | Wichita | 32 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning 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.