Alert archive / Texas / Special Weather Statements in 2020

Special Weather Statement, NWS San Angelo, TX

July 30, 2020Sterling County, Texas

NWS San Angelo, TX issued this special weather statement at Jul 30, 2020, 10:21 PM CDT for Sterling County, Texas. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 30, 2020, 10:21 PM CDT (03:21 UTC)
Expired
Jul 30, 2020, 11:00 PM CDT
In force
39 min
Issued by
NWS San Angelo, TX

County Sterling County, TX

The radar

The San Angelo radar (KSJT), 83 km from the middle of the area, began a volume at 03:24 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

Fort Worth, TX (KFWD), launched 00:00Z, 3.4 hours before the alert went out and 369 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-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2020-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1104 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2020-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1104 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
2261 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.8

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this special weather statement went out at Jul 30, 6:15 PM CDT, 4 hours 6 minutes earlier.

Area forecast discussion, Jul 30, 6:15 PM CDT, 4 hours 6 minutes before
Area Forecast Discussion
National Weather Service San Angelo TX
615 PM CDT Thu Jul 30 2020

.AVIATION...
/00Z TAFS/

Showers and storms will be possible mainly north of I-20 through
12Z, then south of I-20 12Z today through 00Z Sat. Low confidence
in storms impacting any TAF sites, except KABI where moderate
confidence exists for storms impacting them tonight. Any storms
can produce strong and erratic winds, large hail, and locally
heavy rainfall resulting in TEMPO IFR/LIFR conditions. Also,
between 11Z and 17Z, MVFR CIGs will be possible along the I-10
corridor, with KJCT and KSOA likely affected. Otherwise, expecting
VFR conditions through 00Z Sat.

&&

.PREV DISCUSSION... /issued 250 PM CDT Thu Jul 30 2020/

SHORT TERM...
(Tonight and Friday)

A disturbance moving across the Plains will swing a cold front
across the region. This combined with the passing low pressure will
create conditions that are more favorable for thunderstorm
development. In fact, we could see a strong to severe thunderstorm
develop tonight and into Friday as well. The primary hazards are
damaging winds and hail. Expect these storms to be across areas
north of a Sterling City to Brownwood line. Otherwise, look for
slightly cooler temperatures for Friday afternoon. Overnight lows
will settle into the low to mid 70s tonight.

LONG TERM...
(Friday night through Thursday)

Showers and thunderstorms will linger across southern portions of
the forecast area Friday night. Some of the stronger storms will
be capable of producing locally strong downburst winds mainly
Friday evening. The weekend looks dry for the most part, although
can't rule out an isolated shower or thunderstorm along and south
of Interstate 10 Saturday afternoon. High temperatures this
weekend will range from the lower 90s across the Big Country, to
the mid and upper 90s elsewhere, with lows in the upper 60s and
lower 70s.

The next shot at precipitation will be Sunday night into Monday,
when another front is expected to affect portions of the area.
For now, will maintain low POPs, along with slightly cooler
temperatures. Dry and hot weather returns by the middle of next
week, as the upper level ridge begins to strengthen over the
region. Highs will be in the upper 80s and lower 90s across the
Big Country and in the mid and upper 90s elsewhere Monday and
Tuesday, warming into the upper 90s areawide by mid week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene 	 74  91  68  92 /  30  20   5   5
San Angelo 	 73  96  71  97 /   5  20  30  10
Junction 	 75  97  72  97 /   0  30  40  20
Brownwood 	 75  95  69  95 /  10  20  20   5
Sweetwater 	 72  92  70  94 /  30  20  10   5
Ozona      	 72  94  70  95 /   0  20  30  20

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
None.
&&

41/24/88
Hazardous weather outlook, Jul 30, 2:34 PM CDT, 7 hours 47 minutes before
Hazardous Weather Outlook
National Weather Service San Angelo TX
234 PM CDT Thu Jul 30 2020

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-311945-
Fisher-Nolan-Sterling-Coke-Runnels-Irion-Tom Green-Concho-
Crockett-Schleicher-Sutton-Haskell-Throckmorton-Jones-Shackelford-
Taylor-Callahan-Coleman-Brown-McCulloch-San Saba-Menard-Kimble-
Mason-
234 PM CDT Thu Jul 30 2020

This Hazardous Weather Outlook is for portions of north central
Texas, northwest Texas, south central Texas, and southwest Texas.

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorms are possible tonight. In fact, a few of
these storms may become strong to severe. The primary hazards
associated with these storms are damaging winds and hail.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Scattered thunderstorms are possible on Friday. In fact, a few of
these storms may become strong to severe. The primary hazards
associated with these storms are damaging winds and hail.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Jul 30, 6:45 PM CDT, 3 hours 36 minutes before
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Local storm report, Jul 30, 6:55 PM CDT, 3 hours 26 minutes before
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Special weather statement, Jul 30, 7:22 PM CDT, 2 hours 59 minutes before
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Special weather statement, Jul 30, 7:58 PM CDT, 2 hours 23 minutes before
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Local storm report, Jul 30, 9:43 PM CDT, 38 minutes before
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Special weather statement, Jul 30, 10:21 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 7:22 PM CDTSpecial Weather StatementSJTFisher38 min
Jul 30, 7:58 PM CDTSpecial Weather StatementSJTFisher62 min
Jul 31, 5:02 PM CDTSpecial Weather StatementSJTCrockett43 min

Nearby

Special Weather Statements in Texas, 2020Every special weather statement in 2020

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.