Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 87, NWS Amarillo, TX

May 19, 2015Randall County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 19, 2015, 4:05 PM CDT for Randall County, Texas. It was in force for 40 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 19, 2015, 4:05 PM CDT (21:05 UTC)
Expired: May 19, 2015, 4:45 PM CDT
In force: 40 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Randall County, TX

The radar

The Amarillo radar (KAMA), 34 km from the middle of the area, began a volume at 21:08 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.1 hours before the alert went out and 34 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 97 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 573 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

Open this sounding in Storm Lab

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 19, 3:01 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, May 19, 3:01 PM CDT, 1 hour 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
301 PM CDT TUE MAY 19 2015

.DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT
ACROSS MUCH OF THE PANHANDLES. COLD FRONT REMAINS IN THE AREA
ALONG WITH PLENTY OF MOISTURE. WIND SHEAR ALOFT WILL ALSO HELP OUT
TO PRODUCE SHOWERS AND THUNDERSTORMS. SEVERE STORMS WILL BE
POSSIBLE TONIGHT GIVEN THE DYNAMICS. WILL LET THE FLOOD WATCH
EXPIRE ON TIME AS THE SHOWERS AND THUNDERSTORMS MAY BE MORE
SCATTERED WHICH MAY CUT DOWN ON THE CHANCES OF WIDESPREAD FLOODING.

CHANCES OF SHOWERS AND THUNDERSTORMS WILL WANE SOME WEDNESDAY...
BUT THEN THEY WILL RETURN THURSDAY ON THROUGH THE REST OF THIS
FORECAST. AN UPPER TROUGH WILL AGAIN MOVE SLOWLY EAST ACROSS THE
WESTERN U.S. THROUGH THE END OF THE WEEK. THIS WILL KEEP THE
PANHANDLES UNDER A SOUTHWEST FLOW ALOFT WHICH WILL ENCOURAGE A
DRYLINE TO MOVE BACK AND FORTH ACROSS THE REGION.

TEMPERATURES WILL REMAIN BELOW NORMAL THROUGH THIS FORECAST GIVEN
THE LOW LEVEL MOISTURE AND OCCASIONAL CLOUD COVER AND RAIN.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMARILLO TX                50  62  47  59  49 /  30  20  20  20  70
BEAVER OK                  45  61  46  64  49 /  50  10  10  10  60
BOISE CITY OK              44  57  44  58  48 /  30  10  20  20  60
BORGER TX                  50  62  49  62  51 /  40  10  20  20  70
BOYS RANCH TX              50  62  49  60  50 /  20  10  20  20  60
CANYON TX                  52  62  47  57  49 /  20  20  20  20  70
CLARENDON TX               53  63  48  60  50 /  40  20  30  10  70
DALHART TX                 47  60  46  58  48 /  20  10  20  30  60
GUYMON OK                  44  60  46  62  49 /  40  10  10  20  70
HEREFORD TX                52  64  48  58  49 /  20  10  20  30  60
LIPSCOMB TX                49  60  48  62  50 /  50  10  10  10  60
PAMPA TX                   48  59  46  59  48 /  40  20  20  10  70
SHAMROCK TX                54  62  50  62  52 /  50  20  30  10  60
WELLINGTON TX              56  66  53  63  55 /  50  20  30  10  60

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
TX...FLOOD WATCH UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING ZONES:
     COLLINGSWORTH...DONLEY...WHEELER.

OK...NONE.

&&

05/15

Hazardous weather outlook, May 19, 3:18 PM CDT, 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
318 PM CDT TUE MAY 19 2015

OKZ001>003-TXZ001>020-200830-
CIMARRON-TEXAS-BEAVER-DALLAM-SHERMAN-HANSFORD-OCHILTREE-LIPSCOMB-
HARTLEY-MOORE-HUTCHINSON-ROBERTS-HEMPHILL-OLDHAM-POTTER-CARSON-
GRAY-WHEELER-DEAF SMITH-RANDALL-ARMSTRONG-DONLEY-COLLINGSWORTH-
318 PM CDT TUE MAY 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.DAY ONE...TONIGHT.

THUNDERSTORMS WILL BE POSSIBLE ACROSS THE PANHANDLES. A STORM OR TWO
MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE MAIN THREATS.
HEAVY RAIN MAY CAUSE LOCALIZED AREAS OF FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THUNDERSTORMS WILL BE POSSIBLE ACROSS MUCH OF THE PANHANDLES THROUGH
MONDAY. THE BEST CHANCE OF THUNDERSTORMS WILL BE FROM THURSDAY
THROUGH SATURDAY. SOME SEVERE STORMS WILL BE POSSIBLE. HEAVY RAIN MAY
CAUSE LOCALIZED FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

GOEHRING

In the hours before

Special weather statement, May 19, 1:34 PM CDT, 2 hours 31 minutes before

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Special weather statement, May 19, 3:44 PM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
344 PM CDT TUE MAY 19 2015

TXZ016-017-192115-
DEAF SMITH TX-RANDALL TX-
344 PM CDT TUE MAY 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN RANDALL AND EASTERN
DEAF SMITH COUNTIES UNTIL 415 PM CDT...

AT 342 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES NORTH OF UMBARGER...OR 12 MILES WEST OF
CANYON...MOVING EAST AT 30 MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN.

* LOCATIONS IMPACTED INCLUDE...
  CANYON...             DAWN...               UMBARGER...
  BUFFALO LAKE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS... AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY...TURN AROUND DONT DROWN.

LAT...LON 3518 10184 3487 10195 3482 10234 3515 10218
TIME...MOT...LOC 2044Z 250DEG 28KT 3504 10211

BRB

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 2:27 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith	63 min
May 19, 3:19 AM CDT	Areal Flood Advisory	AMA	Deaf Smith	3 hr
May 19, 3:31 AM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	44 min
May 19, 3:41 AM CDT	Flood Watch	AMA	Collingsworth, Donley, Wheeler	20 hr
May 19, 4:16 AM CDT	Special Weather Statement	AMA	Oldham	29 min
May 19, 10:12 AM CDT	Areal Flood Advisory	AMA	Armstrong, Carson, Deaf Smith, Potter, Randall	3 hr
May 19, 11:59 AM CDT	Areal Flood Advisory	AMA	Donley	4 hr
May 19, 12:57 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	2 hr
May 19, 12:58 PM CDT	Areal Flood Advisory	AMA	Collingsworth	4 hr
May 19, 1:34 PM CDT	Special Weather Statement	AMA	Collingsworth	41 min
May 19, 3:44 PM CDT	Special Weather Statement	AMA	Randall	31 min
May 19, 4:25 PM CDT	Special Weather Statement	AMA	Hartley	35 min
May 19, 4:27 PM CDT	Areal Flood Advisory	AMA	Deaf Smith	4 hr
May 19, 4:36 PM CDT	Special Weather Statement	AMA	Armstrong	39 min
May 19, 5:01 PM CDT	Special Weather Statement	AMA	Moore	29 min
May 19, 5:13 PM CDT	Special Weather Statement	AMA	Carson	47 min
May 19, 5:18 PM CDT	River Flood Warning	AMA	Collingsworth	14 hr
May 19, 5:22 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson	38 min
May 19, 5:40 PM CDT	Severe Thunderstorm Warning	AMA	Donley, Gray	65 min
May 19, 5:49 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	56 min
May 19, 6:37 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Donley	53 min
May 19, 6:50 PM CDT	Areal Flood Advisory	AMA	Donley	4 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every severe thunderstorm warning in 2015

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.