Alert archive / Texas / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 18, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Apr 23, 2006, 11:27 PM CDT for Hemphill County, Roberts County, Texas. It was in force for 41 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
- Apr 23, 2006, 11:27 PM CDT (04:27 UTC)
- Expired
- Apr 24, 2006, 12:08 AM CDT
- In force
- 41 min
- Issued by
- NWS Amarillo, TX
- Area
- Counties, with a storm outline in the text
Counties Hemphill County, TX, Roberts County, TX
The radar
The Amarillo radar (KAMA), 125 km from the middle of the area, began a volume at 04:28 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
Dodge City, (KDDC), launched 00:00Z, 4.5 hours before the alert went out and 222 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3879 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 108 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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 4:04 PM CDT, 7 hours 23 minutes earlier.
Area forecast discussion, Apr 23, 4:04 PM CDT, 7 hours 23 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 404 PM CDT SUN APR 23 2006 .DISCUSSION... MOISTURE OVER EASTERN PANHANDLES NOT QUITE AS DEEP AS MODEL FORECASTS...HOWEVER DEEPENING SURFACE LOW OVER SOUTHEASTERN COLORADO AND NORTHEASTERN NEW MEXICO WILL FOSTER CONTINUED RETREAT OF DRYLINE. INCREASED CONVERGENCE ALONG THE DRYLINE GIVING RISE TO CONGESTUS/CB DEVELOPMENT AND AS CONVECTIVE TEMP IS REACHED WILL SEE STRONG/SEVERE STORMS DEVELOP...WITH CONCERNS OF LARGE HAIL AND DAMAGING WINDS. STRONGEST WINDS ALOFT WILL OVERSPREAD BY EARLY THIS EVENING AND MAY HELP DEVELOP MORE COVERAGE OF STORMS THROUGH THE EVENING. COLD FRONT WELL AHEAD OF SCHEDULE WITH NORTH AND NORTHEAST WINDS REPORTED AS FAR SOUTH AS DENVER. EXPECT FRONT TO CONTINUE ON THIS ACCELERATED TRACK AND BE THROUGH THE OKLAHOMA PANHANDLE BY 12Z MONDAY...WITH PROGRESSION THROUGH THE REST OF THE FORECAST AREA BY MIDDAY. MOISTURE IS EXPECTED TO SHUNT EAST AS SFC LOW MOVES EAST...BUT LINGERING MOISTURE IN THE EASTERN ZONES MAY INTERACT WITH THE FRONT THROUGH THE DAY...AND HAVE MANIPULATED POPS ON MONDAY FOR SHOWER ACTIVITY. CLOUD COVER EXPECTED TO INCREASE AS COLD AIR MOVES IN...AND SO TEMPERATURES WERE LOWERED SLIGHTLY FOR MONDAY. CANADIAN ORIGIN AIR WILL MOVE IN BEHIND THE FRONT...WITH CONTINUED CLOUD COVER. 850 MB TEMPS SUGGEST COLD OVERNIGHT LOWS FOR TUESDAY AND WEDNESDAY...AND HAVE CHOSEN MIN AND MAX TEMPS ON THE LOW SIDE OF GUIDANCE FOR THESE PERIODS. SFC RIDGE THEN MOVES OFF AND SOUTHERLY WINDS RESUME AHEAD OF NEXT SYSTEM. SLOW WARMUP CONSEQUENTLY EXPECTED THROUGH REST OF WORK WEEK AS MOISTURE SLOWLY RETURNS. INCREASING CLOUD COVER AHEAD OF APPROACHING UPPER SYSTEM BEGINS THURSDAY EVENING. MODELS APPEAR TO BE SLOWING EJECTION OF UPPER LOW OVER SOUTHERN CALIFORNIA...AS RIDGE BUILDS IN TO ITS NORTH AND GIVES THE IMPRESSION OF CUTTING OFF THE CIRCULATION. WITH INCREASED CLOUD COVER...HAVE LOWERED MAX TEMPS OFF OF GUIDANCE A FEW DEGREES FOR THE EXTENDED PERIODS. ANOTHER FRONT PASSES THROUGH FRIDAY IN ADVANCE OF APPROACHING SYSTEM...AND MAY INSPIRE SHOWER FORMATION LATE IN THE FORECAST PERIOD. HAVE CONTINUED SLIGHT CHANCE POPS ACCORDINGLY FROM PREVIOUS FORECAST. OTHERWISE MEX NUMBERS LOOKED GOOD AND WERE ACCEPTED. && .PRELIMINARY POINT TEMPS/POPS... AMARILLO TX 54 74 36 59 / 30 10 10 0 BEAVER OK 57 61 36 60 / 20 20 10 0 BOISE CITY OK 50 59 32 56 / 20 10 10 0 BORGER TX 59 71 41 61 / 30 10 10 0 BOYS RANCH TX 54 72 39 61 / 20 10 10 0 CANYON TX 52 76 38 61 / 30 10 10 0 CLARENDON TX 62 80 42 62 / 40 20 10 0 DALHART TX 50 66 35 58 / 20 10 10 0 GUYMON OK 51 62 34 59 / 20 10 10 0 HEREFORD TX 53 74 37 61 / 20 10 10 0 LIPSCOMB TX 59 73 37 62 / 40 20 10 0 PAMPA TX 61 71 39 59 / 40 10 10 0 SHAMROCK TX 64 80 44 63 / 30 20 10 0 WELLINGTON TX 65 82 47 65 / 20 20 10 0 && .AMA WATCHES/WARNINGS/ADVISORIES... OK...NONE. TX...NONE. && KRAMAR
Hazardous weather outlook, Apr 23, 10:25 PM CDT, 1 hour 2 minutes before
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Special weather statement, Apr 23, 7:48 PM CDT, 3 hours 39 minutes before
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</html>The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 8:22 PM CDT | Severe Thunderstorm Warning | AMA | Oldham | 35 min |
| Apr 23, 11:14 PM CDT | Severe Thunderstorm Warning | AMA | Lipscomb | 61 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2006Every severe thunderstorm warning in 2006
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.