Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 129, NWS San Angelo, TX

May 6, 2015Haskell County, Throckmorton County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at May 6, 2015, 9:54 PM CDT for Haskell County, Throckmorton County, Texas. It was in force for 66 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 6, 2015, 9:54 PM CDT (02:54 UTC)
Expired: May 6, 2015, 11:00 PM CDT
In force: 66 min
Issued by: NWS San Angelo, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 2.5 in
Wind: 70.0 mph

Counties Haskell County, TX, Throckmorton County, TX

The radar

The Dyess AFB radar (KDYX), 74 km from the middle of the area, began a volume at 02:58 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 6, 8:51 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.9 hours before the alert went out and 207 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: 1584 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.7

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 6, 6:15 PM CDT, 3 hours 39 minutes earlier.

Area forecast discussion, May 6, 6:15 PM CDT, 3 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
615 PM CDT Wed May 6 2015

.AVIATION...
/00Z TAFS/
Currently severe storms across the Big Country north of the KABI
terminal. Going with a VCTS at the KABI terminal and an hour tempo
group between 03-04Z. New storms developing out into the eastern
Permian Basin and may make it east into the Concho Valley and
possibly the KSJT terminal after 01Z. Otherwise, at least isolated
thunderstorms after midnight. Widespread stratus will develop
after 06Z across West Central Texas with mainly IFR ceilings
through Thursday morning. The winds will be south with gusts to
near 25 knots.

&&

.PREV DISCUSSION... /ISSUED 408 PM CDT Wed May 6 2015/

SHORT TERM...
There is currently a severe weather threat on going across West
Central Texas, with Tornado Watches in effect until 9 PM. The main
reasons for the severe weather is strong instability and bulk effective
shear of 40 to 45 knots. Have one isolated severe storm just west
of Coleman and a few showers and storms over the western Big
Country. The best potential for severe storms will be this evening
anywhere across the area. The main hazards will be isolated
tornadoes, very large hail and damaging winds. Have likely Pops
across the Big Country to chance Pops further south.

For Thursday, there will a another chance of thunderstorms. The
best threat for a few severe storms will be across north of the
I-20 corridor, where the instability and shear will be more
favorable. The main hazards will be large hail and damaging winds.
the best chance for severe weather will be during the afternoon
and evening.

LONG TERM...
(Thursday Night through Sunday)

There will be a chance of thunderstorms through much of the extended
period, with severe weather possible through this weekend. Upper
level southwest flow will continue on Friday across the southern
Plains with a dryline which will push into the western 1/3 of the
area during the afternoon. the combination of strong instability and
good deep layer shear will lead to scattered thunderstorms mainly
during the afternoon and evening across much of the area. A few
storms may be severe, with large hail and damaging winds being the
main threats. For Saturday, a strong upper level short wave will
rotate northeast across Texas and Oklahoma with increasing mid and
upper level ascent. At the surface, low pressure will be located
across western Kansas by Saturday afternoon with a dryline extending
south across western Texas. Thunderstorms will fire once again
across the eastern 2/3 of our area. The combination of good
instability and 0-6km shear will probably lead some storms being
severe. Also, the strong upper level forcing, along with a fast mid
level jet, may result in more significant severe weather, at least
across the eastern 1/3 of the area. This is something we will have
to watch at we get closer to the event. For Sunday, the combination
of a cold front and continue upper level southwest flow will lead to
another round of convection and the possibility for some heavy
rainfall as the deep layer flow will be unidirectional with the
possibility of training cells.

(Monday through Wednesday)

Looks like a potential wet pattern will continue across West
Central through early next week. The combination of warm air
advection above a shallow cool airmass and upper level disturbance
moving by will continue to bring a chance of showers and
thunderstorms.

&&

.PRELIMINARY POINT TEMPS/POPS...
Abilene 	 66  82  67  84  67 /  60  50  30  50  40
San Angelo 	 68  86  69  87  68 /  40  30  20  30  30
Junction 	 68  82  69  83  68 /  30  20  20  40  30

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

21

Hazardous weather outlook, May 6, 1:59 PM CDT, 7 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SAN ANGELO TX
159 PM CDT WED MAY 6 2015

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-071900-
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-
159 PM CDT WED MAY 6 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND
EVENING ACROSS MUCH OF WEST CENTRAL TEXAS. THE MOST SIGNIFICANT
SEVERE WEATHER THREAT AREA...INCLUDING A FEW TORNADOES...HAIL
LARGER THAN BASEBALL BALL SIZE...DAMAGING WINDS...WILL BE ALONG
AND NORTH OF A SWEETWATER TO BALLINGER TO BROWNWOOD LINE. IN
ADDITION...STORMS WILL PRODUCE DANGEROUS LIGHTNING AND THE
POTENTIAL FOR LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A CHANCE OF THUNDERSTORMS WILL CONTINUE INTO EARLY NEXT WEEK.
WHILE ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE EACH DAY...THERE
IS THE POTENTIAL FOR MORE ORGANIZED SEVERE WEATHER ON SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON AND EVENING.

24

In the hours before

Local storm report, May 6, 6:30 PM CDT, 3 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
630 PM CDT WED MAY 06 2015

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

0515 PM     HAIL             ALBANY                  32.73N  99.30W
05/06/2015  E2.25 INCH       SHACKELFORD        TX   PUBLIC

&&

EVENT NUMBER SJT1500266

JOHNSON

Local storm report, May 6, 7:06 PM CDT, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
706 PM CDT WED MAY 06 2015

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

0706 PM     HAIL             SAGERTON                33.08N  99.96W
05/06/2015  E1.00 INCH       HASKELL            TX   PUBLIC

&&

EVENT NUMBER SJT1500267

PM

Local storm report, May 6, 7:30 PM CDT, 2 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
730 PM CDT WED MAY 06 2015

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

0729 PM     HAIL             HASKELL                 33.16N  99.73W
05/06/2015  E1.00 INCH       HASKELL            TX   LAW ENFORCEMENT

&&

EVENT NUMBER SJT1500268

PM

Local storm report, May 6, 7:36 PM CDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
736 PM CDT WED MAY 06 2015

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

0725 PM     HAIL             4 S HASKELL             33.10N  99.73W
05/06/2015  E2.75 INCH       HASKELL            TX   PUBLIC

&&

EVENT NUMBER SJT1500269

PM

Local storm report, May 6, 8:24 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
824 PM CDT WED MAY 06 2015

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

0738 PM     HAIL             RULE                    33.18N  99.89W
05/06/2015  M1.25 INCH       HASKELL            TX   TRAINED SPOTTER

&&

EVENT NUMBER SJT1500270

JOHNSON

Local storm report, May 6, 9:53 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
953 PM CDT WED MAY 06 2015

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

0937 PM     TORNADO          8 W THROCKMORTON        33.19N  99.32W
05/06/2015                   THROCKMORTON       TX   STORM CHASER

            LARGE TORNADO REPORTED BY MULTIPLE STORM CHASERS NEAR
            THE INTERSECTION OF US 380 AND TX 222. TORNADO HAS SINCE
            BECOME RAIN WRAPPED.

&&

EVENT NUMBER SJT1500271

JOHNSON

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 7:25 PM CDT	Areal Flood Advisory	SJT	Haskell	95 min
May 6, 7:29 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	46 min
May 6, 8:10 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	50 min
May 6, 8:17 PM CDT	Tornado Warning	SJT	Haskell, Throckmorton	43 min
May 6, 8:36 PM CDT	Areal Flood Advisory	SJT	Haskell, Throckmorton	114 min
May 6, 8:53 PM CDT	Tornado Warning	SJT	Haskell, Throckmorton	52 min
May 6, 8:56 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	64 min
May 6, 9:05 PM CDT	Flash Flood Warning	SJT	Haskell, Throckmorton	3 hr
May 6, 9:31 PM CDT	Tornado Warning	SJT	Throckmorton	44 min
May 6, 10:05 PM CDT	Special Weather Statement	SJT	Irion	40 min
May 6, 10:08 PM CDT	Tornado Warning Tornado observed	SJT	Throckmorton	52 min
May 6, 10:53 PM CDT	Tornado Warning	SJT	Throckmorton	36 min
May 6, 10:58 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	32 min
May 7, 1:55 PM CDT	Special Weather Statement	SJT	Throckmorton	65 min
May 7, 2:11 PM CDT	Special Weather Statement	SJT	Throckmorton	34 min
May 7, 2:43 PM CDT	Special Weather Statement	SJT	Throckmorton	32 min
May 7, 3:37 PM CDT	Special Weather Statement	SJT	Throckmorton	23 min
May 7, 4:35 PM CDT	Special Weather Statement	SJT	Haskell	25 min
May 7, 4:59 PM CDT	Special Weather Statement	SJT	Haskell	31 min
May 7, 5:28 PM CDT	Special Weather Statement	SJT	Haskell	47 min
May 7, 5:38 PM CDT	Special Weather Statement	SJT	Fisher, Jones	52 min
May 7, 5:42 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Throckmorton	48 min
May 7, 5:49 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Jones, Shackelford	41 min
May 7, 6:02 PM CDT	Special Weather Statement	SJT	Throckmorton	43 min
May 7, 6:06 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	39 min
May 7, 6:20 PM CDT	Severe Thunderstorm Warning	SJT	Haskell, Shackelford, Throckmorton	40 min
May 7, 6:24 PM CDT	Special Weather Statement	SJT	Taylor	21 min
May 7, 6:28 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	47 min
May 7, 6:44 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Haskell, Jones, Shackelford, Taylor	46 min
May 7, 6:58 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford, Throckmorton	32 min

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.