Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 402, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 6, 2009, 6:57 PM CDT for 4 counties in Texas. It was in force for 63 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
- Jun 6, 2009, 6:57 PM CDT (23:57 UTC)
- Expired
- Jun 6, 2009, 8:00 PM CDT
- In force
- 63 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
Counties Baylor County, TX, Foard County, TX, Knox County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 77 km from the middle of the area, began a volume at 23:56 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 |
|---|---|---|---|
| Jun 6, 4:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 12.0 hours before the alert went out and 256 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
- 11 J/kg
- Mixed-layer CIN
- -432 J/kg
- Mixed-layer LCL
- 2566 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jun 6, 6:50 PM CDT, 7 minutes earlier.
Area forecast discussion, Jun 6, 6:50 PM CDT, 7 minutes before
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</html>Hazardous weather outlook, Jun 6, 6:38 PM CDT, 19 minutes before
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Special weather statement, Jun 6, 4:29 PM CDT, 2 hours 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 429 PM CDT SAT JUN 6 2009 TXZ087-062200- KNOX TX- 429 PM CDT SAT JUN 6 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR KNOX COUNTY. A STRONG TO SEVERE THUNDERSTORM WAS LOCATED 14 MILES SOUTHWEST OF KNOX CITY AT 428 PM CDT...MOVING NORTHEAST AT 25 MPH. A SEVERE THUNDERSTORM WARNING MAY BE REQUIRED FOR KNOX COUNTY BY 445 PM. SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.
Special weather statement, Jun 6, 4:44 PM CDT, 2 hours 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 444 PM CDT SAT JUN 6 2009 TXZ083>085-062215- HARDEMAN TX-WILBARGER TX-FOARD TX- 444 PM CDT SAT JUN 6 2009 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR FOARD...HARDEMAN AND WILBARGER COUNTIES. A CLUSTER OF STRONG THUNDERSTORMS WAS LOCATED BETWEEN CROWELL AND GILLILAND AT 441 PM CDT...MOVING NORTHEAST AT 20 MPH. SOME STRENGTHENING IS POSSIBLE AND A WARNINGS MAY BE REQUIRED WITHIN THE NEXT 30 MINUTES.
Local storm report, Jun 6, 6:15 PM CDT, 42 minutes before
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</html>Local storm report, Jun 6, 6:38 PM CDT, 19 minutes before
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</html>Local storm report, Jun 6, 6:56 PM CDT, 1 minute before
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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 |
|---|---|---|---|---|
| Jun 6, 1:54 AM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woodward | 71 min |
| Jun 6, 2:52 AM CDT | High Wind Warning | OUN | Alfalfa, Blaine, Dewey, Ellis, Garfield, Grant and 5 more | 3 hr |
| Jun 6, 4:58 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Wilbarger | 62 min |
| Jun 6, 5:05 PM CDT | Severe Thunderstorm Warning | OUN | Knox | 55 min |
| Jun 6, 6:01 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Knox, Wilbarger | 59 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning 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.