Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 52, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at May 15, 2009, 3:07 PM CDT for Ochiltree County, Roberts County, Texas. It was in force for 53 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
- May 15, 2009, 3:07 PM CDT (20:07 UTC)
- Expired
- May 15, 2009, 4:00 PM CDT
- In force
- 53 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
Counties Ochiltree County, TX, Roberts County, TX
The radar
The Amarillo radar (KAMA), 122 km from the middle of the area, began a volume at 20:10 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 |
|---|---|---|---|
| May 15, 3:02 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.1 hours before the alert went out and 122 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
- 2717 J/kg
- Mixed-layer CIN
- -204 J/kg
- Mixed-layer LCL
- 1202 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 326 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 15, 3:01 PM CDT, 6 minutes earlier.
Area forecast discussion, May 15, 3:01 PM CDT, 6 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 301 PM CDT FRI MAY 15 2009 .DISCUSSION... AS OF 2 PM CDT THE COLD FRONT WAS APPROXIMATELY ALONG A LINE FROM DUMAS TX TO PERRYTON TX TO GATE OK. THE SEVERE POTENTIAL LOOKS LIMITED TO THE EASTERN TWO COLUMNS OF COUNTIES IN THE TEXAS PANHANDLE FOR NOW. THOUGH THE PROGRESSION HAS SLOWED A BIT OVER THE LAST 4 HOURS...THE FRONT SHOULD ARRIVE AT AMA AROUND 00Z AND PUSH SOUTH OF THE PANHANDLES BY 03Z. WITH THIS EARLIER ARRIVAL OF THE FRONT...LOWERED POPS ESPECIALLY IN THE NORTHWEST PANHANDLES. AFTER 06Z...THE POST FRONTAL FORCING IS MAINLY OROGRAPHICAL...AND WEAKER IN THE LATEST MODEL RUNS THAN PREVIOUSLY THOUGHT. HOWEVER...MODEL SOUNDINGS STILL SUGGEST SOME ELEVATED INSTABILITY...SO KEPT POPS ESPECIALLY ACROSS THE SOUTHEASTERN HALF OF THE PANHANDLES THROUGH 18Z. IN ADDITION TO THE IMPACT ON POPS...EXPECT THAT WITH THE FRONT PUSHING FURTHER SOUTH FASTER THAN PREVIOUSLY EXPECTED...COULD SEE CLEARING BEGINNING BY 18Z...AND THUS INCREASED TEMPS SLIGHTLY. BEGINNING SUNDAY...GFS CONTINUES TO SHOW A BROAD RIDGE BUILDING OVER THE HIGH PLAINS THROUGH AT LEAST MID WEEK. THEREFORE...HAVE KEPT THE FORECAST DRY PAST SATURDAY. THE GFS AND THE ECMWF STILL SEAM OVERLY AGGRESSIVE IN BREAKING DOWN THE RIDGE BY THURSDAY. WITH THE LACK OF AGREEMENT BETWEEN THE MODELS AND STILL RUN TO RUN...HAVE KEPT FRIDAY DRY DESPITE THE GFS ADVERTISING A TROUGH DIGGING THROUGH THE REGION. KEPT TEMPERATURES CLOSE TO GUIDANCE THROUGH THE EXTENDED. && .FIRE WEATHER... FIRE WEATHER CONCERNS WILL BE LOW OVER THE NEXT FEW DAYS WITH RELATIVELY HIGH ATMOSPHERIC MOISTURE AND FAIRLY COOL WEATHER KEEPING RELATIVE HUMIDITY VALUES ABOVE 20 PERCENT. AS A WARMING TREND BEGINS ON SUNDAY...RELATIVE HUMIDITY VALUES ESPECIALLY OVER THE WESTERN PANHANDLES COULD DROP TO NEAR 15 PERCENT MONDAY AND TUESDAY...THOUGH LIGHT WINDS ARE EXPECTED. && .PRELIMINARY POINT TEMPS/POPS... AMARILLO TX 51 63 45 72 48 / 40 20 5 0 0 BEAVER OK 54 66 43 75 47 / 30 10 5 0 0 BOISE CITY OK 48 64 43 75 50 / 20 10 5 0 0 BORGER TX 53 65 49 76 53 / 40 20 5 0 0 BOYS RANCH TX 55 66 47 79 50 / 40 20 5 0 0 CANYON TX 53 66 43 74 47 / 40 20 10 0 0 CLARENDON TX 55 66 46 70 48 / 50 30 10 0 0 DALHART TX 53 65 44 77 47 / 30 10 5 0 0 GUYMON OK 51 66 44 75 49 / 20 10 5 0 0 HEREFORD TX 53 67 44 75 46 / 40 20 10 0 0 LIPSCOMB TX 55 65 43 73 47 / 30 20 5 0 0 PAMPA TX 51 63 48 71 50 / 40 30 5 0 0 SHAMROCK TX 57 67 44 72 48 / 50 30 5 0 0 WELLINGTON TX 59 68 46 72 48 / 60 30 10 0 0 && .AMA WATCHES/WARNINGS/ADVISORIES... TX...NONE. OK...NONE. && 09/16
Hazardous weather outlook, May 15, 1:00 PM CDT, 2 hours 7 minutes before
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</html>In the hours before
Special weather statement, May 15, 3:02 PM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 302 PM CDT FRI MAY 15 2009 TXZ004-005-009-010-152045- LIPSCOMB TX-OCHILTREE TX-ROBERTS TX-HEMPHILL TX- 302 PM CDT FRI MAY 15 2009 ...STRONG THUNDERSTORM ACROSS HEMPHILL...ROBERTS...OCHILTREE AND LIPSCOMB COUNTIES... AT 258 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER ROBERTS COUNTY...OR ABOUT 24 MILES SOUTHEAST OF SPEARMAN...MOVING EAST AT 10 MPH. UP TO ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE. STORM INTENSITY IS INCREASING AND SEVERE WEATHER MAY DEVELOP RAPIDLY. BE PREPARED TO TAKE ACTION IF A WARNING IS ISSUED. NUTTALL
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 3:58 PM CDT | Severe Thunderstorm Warning | AMA | Hutchinson, Ochiltree, Roberts | 37 min |
| May 15, 4:03 PM CDT | Severe Thunderstorm Warning | AMA | Lipscomb | 33 min |
| May 15, 4:08 PM CDT | Areal Flood Advisory | AMA | Roberts | 3 hr |
| May 15, 4:29 PM CDT | Tornado Warning | AMA | Gray, Roberts | 46 min |
| May 15, 4:51 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Gray, Hutchinson, Roberts | 54 min |
| May 15, 5:03 PM CDT | Tornado Warning | AMA | Gray, Roberts | 42 min |
| May 15, 5:32 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Collingsworth, Donley, Gray, Wheeler | 58 min |
| May 15, 5:34 PM CDT | Tornado Warning | AMA | Gray, Wheeler | 41 min |
| May 15, 5:42 PM CDT | High Wind Warning | AMA | Armstrong, Carson, Deaf Smith, Oldham, Potter, Randall | 3 hr |
| May 15, 6:25 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Donley, Gray | 51 min |
| May 15, 6:29 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley, Gray, Wheeler | 61 min |
| May 15, 6:45 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Wheeler | 60 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.