Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 195, NWS Fort Worth, TX

August 13, 2002Grayson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Aug 13, 2002, 11:13 PM CDT for Grayson County, Texas. It was in force for 62 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 13, 2002, 11:13 PM CDT (04:13 UTC)
Expired: Aug 14, 2002, 12:15 AM CDT
In force: 62 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

County Grayson County, TX

What was reported inside it

Time	Report	Where	Remark
Aug 14, 12:10 AM CDT	Thunderstorm Wind	Pottsboro, TX	Numerous trees and power lines blown down by high winds.
Aug 14, 12:10 AM CDT	Thunderstorm Wind 52 E	Gordonville, TX	Wind overturned an 18 wheeler on State Highway 377 where it crosses Lake Texhoma.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 13, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.2 hours before the alert went out and 105 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: 2727 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1677 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 13, 9:55 PM CDT, 1 hour 18 minutes earlier.

Area forecast discussion, Aug 13, 9:55 PM CDT, 1 hour 18 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
955 PM CDT TUE AUG 13 2002

BUSY LATE EVENING BEGINNING TO UNFOLD AS BROAD MID LVL TROUGH FROM
NEBRASKA TO NEW MEXICO TRUDGES EAST TOWARDS NORTH TEXAS. FRONTAL BOUNDARY
GENERALLY LAID OUT SW-NE FROM NEAR MIDLAND...TO ABILENE...TO NEAR
BOWIE...TO TULSA OK. ORIGINAL SEVERE STORMS BLEW UP IN WARM...
UNSTABLE SECTOR AND PROPAGATED SSWD TOWARDS AREA OF GREATEST
INSTABILITY AND MOISTURE CONVERGENCE BETWEEN SAN ANGELO AND
MIDLAND...WHILE NORTH-CENTRAL TX WAS SPARE. NOW HOWEVER...ANOTHER
SQUALL LINE/LINEAR MCS HAS DEVELOPED...SOMEWHAT ELEVATED BETWEEN
CHILDRESS AND WICHITA FALLS AS MAIN SHORTWAVE ROTATES THROUGH BASE
OF LONGWAVE TROUGH IN FAR WEST TX AND TOWARDS NORTH TX.

AGREE WITH SPC THAT SEMI-ELEVATED...SEVERE STORMS WILL BE A
THREAT...MAINLY ACROSS THE RED RIVER VALLEY WHERE BETTER MID LVL
SPEED SHEAR EXISTS ALONG WITH BETTER FEED FROM LOW LVL JET. SOME
DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE. THUS...SEVERE TSTORM
WATCH 607 IS IN EFFECT UNTIL 2 AM CDT FOR THE NORTHERN 2 TIERS OF
COUNTIES (SEE WARNINGS/ADVISORIES SUMMARY BELOW AND FTWSLSTX OR
FTWSEL7 FOR FURTHER DETAILS). OTHERWISE...ADJUSTED ARRIVAL OF COOLER
N/NW WINDS AND CONVECTION TO OCCUR LATER IN THE NIGHT WITH JUST
MINOR TWEAKS TO OVERNIGHT LOWS/DEW PTS.

FCSTID = 05/
DFW   71  85  66  92 /  60  20   0   0
ACT   74  88  69  92 /  40  50   0   0
PRX   68  83  62  92 /  70  80   0   0
DTO   69  83  62  92 /  70  80   0   0
TKI   70  83  62  92 /  70  80   0   0
DAL   73  85  66  92 /  60  20   0   0
TRL   71  85  66  92 /  60  20   0   0
CRS   73  87  67  92 /  40  20   0   0
TPL   73  90  68  90 /  40  30   0   0

.FWD...
.TX...SEVERE THUNDERSTORM WATCH UNTIL 200 AM CDT WEDNESDAY MORNING
FOR ZONES TXC085...TXC097... TXC119...TXC121... TXC147...TXC181
...TXC223...TXC231 ...TXC237...TXC277...TXC337...TXC497 (RED RIVER
VALLEY).

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 12:02 AM CDT	Severe Thunderstorm Warning	FWD	Cooke	28 min
Aug 14, 1:42 AM CDT	Severe Thunderstorm Warning	FWD	Fannin, Lamar	48 min
Aug 14, 3:55 PM CDT	Severe Thunderstorm Warning	FWD	Johnson	65 min
Aug 14, 4:32 PM CDT	Flash Flood Warning	FWD	Johnson	3 hr
Aug 14, 5:11 PM CDT	Severe Thunderstorm Warning	FWD	Bosque	64 min
Aug 14, 6:47 PM CDT	Flash Flood Warning	FWD	Erath	118 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.