Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 189, NWS Amarillo, TX

July 3, 2017Beaver County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 3, 2017, 3:40 PM CDT for Beaver County, Oklahoma. It was in force for 80 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: Jul 3, 2017, 3:40 PM CDT (20:40 UTC)
Expired: Jul 3, 2017, 5:00 PM CDT
In force: 80 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Beaver County, OK

The radar

The Dodge City radar (KDDC), 121 km from the middle of the area, began a volume at 20:41 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
Jul 3, 3:24 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 8.7 hours before the alert went out and 124 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1633 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

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 Jul 3, 1:01 PM CDT, 2 hours 39 minutes earlier.

Area forecast discussion, Jul 3, 1:01 PM CDT, 2 hours 39 minutes before

Area Forecast Discussion
National Weather Service Amarillo TX
101 PM CDT Mon Jul 3 2017

.AVIATION...
For 18z TAFs... VFR conditions are expected through most of the
period. Any cig/vsby reductions today would be due to
thunderstorm activity this afternoon and evening. Also can't rule
out some brief low level clouds around sunrise Tuesday, but
confidence is low at this time to include mention in TAFs.
Isolated to scattered thunderstorm activity is expected across
mainly the central and eastern Panhandles this afternoon and
evening. Included VCTS at all sites to try to time the initial
round of activity, but confidence in any terminal being directly
impacted by convection is not high enough to include prevailing at
this time. A second round of convection may try to move out of
NM/CO/KS later this evening, so included pop30 to account for this
potential. Winds will be primarily southerly at 10-15 knots but
thunderstorm outflow may lead to significant wind changes at some
locations. Winds are expected to veer through the night and become
north- northeasterly by early Tuesday.

Ward

&&

.PREV DISCUSSION... /Issued 620 AM CDT Mon Jul 3 2017/

AVIATION...
An outflow boundary has switched the winds at GUY to the east. Do
not think the boundary will make it to DHT or AMA, so winds will
stay out of the southwest and south at these places. The best
chance of showers and thunderstorms look to be at GUY this
afternoon and evening. Have added a PROB30 there for this
possibility. Winds will switch around to the northeast tonight
behind a surface trough at GUY and DHT. Skies are expected to
remain VFR outside of thunderstorms.

PREV DISCUSSION... /Issued 321 AM CDT Mon Jul 3 2017/

DISCUSSION...
A few left over showers are possible across the far southeastern
TX Panhandle associated with the convection from earlier this
morning, but otherwise, skies will begin to clear up as we go
toward daybreak. As we go later into the afternoon and early
evening hours, an upper level shortwave will eject into western
Kansas from the Colorado Rockies. Latest 250 hPa analysis also
shows a 65-70 kt jet streak just out ahead of the trough axis
with additional upper level divergence over parts of the eastern
Panhandles. In-conjunction with a small theta-e ridge moving
northeastward into the northeast Panhandles as we go into the
afternoon hours, latest 03/00Z model and numerical guidance shows
southerly flow will advect sufficient surface moisture northward
across the eastern Panhandle. Latest forecast sounding profiles do
show a low shear, high CAPE environment which should support
organized convection near the origin point of southern Kansas if a
multi-cell complex develops and moves southeast into northern OK
and parts of the northeastern and far eastern Panhandles. Some of
these storms in the aforementioned areas could produce strong
winds and large hail with good CAPE in the hail growth zone. High
temperatures today will be near to slightly above average for
early July.

Diurnal convection will continue into mid week as the center of a
large mid level anti-cyclone will move poleward toward the central
Rockies with weak perturbations in the flow that could generate
an isolated shower or storm, especially near surface convergence
boundaries. As we go toward the end of the work week into the
weekend, the large scale upper level convergence will affect the
Panhandles with tranquil conditions expected as the main upper
level ridge builds with the axis well to the west of our region.
Temperatures will be well above average with high temperatures
throughout the forecast well into the 90s with some areas near 100
degrees.

Meccariello

&&

.AMA Watches/Warnings/Advisories...
TX...None.
OK...None.

&&

7/3

Hazardous weather outlook, Jul 3, 3:29 AM CDT, 12 hours 11 minutes before

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In the hours before

Local storm report, Jul 3, 10:23 AM CDT, 5 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1023 AM CDT MON JUL 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0640 PM     TSTM WND GST     6 WSW WARE              36.14N 102.79W
07/02/2017  E60 MPH          DALLAM             TX   EMERGENCY MNGR

            LATE REPORT OF THUNDERSTORM WIND GUSTS ESTIMATED UP TO
            60 MPH.

&&

EVENT NUMBER AMA1700752

TLH

Local storm report, Jul 3, 3:30 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE AMARILLO TX
330 PM CDT MON JUL 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0640 PM     TSTM WND GST     6 WSW WARE              36.14N 102.79W
07/02/2017  E60 MPH          DALLAM             TX   EMERGENCY MNGR

            LATE REPORT OF THUNDERSTORM WIND GUSTS ESTIMATED UP TO
            60 MPH.

1044 PM     HAIL             BUSHLAND                35.19N 102.06W
07/02/2017  E0.88 INCH       POTTER             TX   NWS EMPLOYEE

            ACCUMULATING HAIL

1046 PM     HAIL             BUSHLAND                35.19N 102.06W
07/02/2017  E1.00 INCH       POTTER             TX   NWS EMPLOYEE

            SOME QUARTERS WITHIN THE ACCUMULATING HAIL.

1052 PM     HAIL             6 WNW TIMBERCREEK CANYO 35.10N 101.91W
07/02/2017  E0.75 INCH       RANDALL            TX   TRAINED SPOTTER

            SOME ACCUMULATING HAIL ON I 27 SOUTH AT SUNDOWN

&&

EVENT NUMBER AMA1700752 AMA1700749 AMA1700750 AMA1700751

EA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 7:37 PM CDT	Special Weather Statement	AMA	Hartley, Moore	38 min
Jul 2, 8:19 PM CDT	Special Weather Statement	AMA	Hartley	41 min
Jul 2, 8:32 PM CDT	Special Weather Statement	AMA	Potter	43 min
Jul 2, 8:54 PM CDT	Special Weather Statement	AMA	Potter, Randall	66 min
Jul 2, 9:02 PM CDT	Special Weather Statement	AMA	Oldham	43 min
Jul 2, 9:59 PM CDT	Special Weather Statement	AMA	Potter	46 min
Jul 2, 10:39 PM CDT	Special Weather Statement	AMA	Randall	51 min
Jul 2, 10:50 PM CDT	Areal Flood Advisory	AMA	Potter, Randall	3 hr
Jul 2, 11:50 PM CDT	Special Weather Statement	AMA	Randall	55 min
Jul 3, 1:15 AM CDT	Special Weather Statement	AMA	Randall	45 min
Jul 3, 4:08 PM CDT	Severe Thunderstorm Warning	AMA	Lipscomb, Ochiltree	82 min
Jul 3, 4:39 PM CDT	Special Weather Statement	AMA	Roberts	36 min
Jul 3, 5:06 PM CDT	Special Weather Statement	AMA	Dallam, Hartley	54 min
Jul 3, 5:10 PM CDT	Special Weather Statement	AMA	Deaf Smith	65 min
Jul 3, 5:19 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	86 min
Jul 3, 5:26 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	94 min
Jul 3, 6:21 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham, Potter, Randall	54 min
Jul 3, 6:27 PM CDT	Special Weather Statement	AMA	Ochiltree	33 min
Jul 3, 6:41 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb, Ochiltree, Roberts	82 min
Jul 3, 3:50 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	70 min
Jul 3, 4:48 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	87 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning in 2017

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.