Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 607, NWS Norman, OK

July 30, 2009Cotton County, Jefferson County, Oklahoma; Archer County, Clay County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Jul 30, 2009, 1:00 AM CDT for Cotton County, Jefferson County, Oklahoma; Archer County, Clay County, Wichita County, Texas. It was in force for 60 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 30, 2009, 1:00 AM CDT (06:00 UTC)
Expired
Jul 30, 2009, 2:00 AM CDT
In force
60 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

Counties Cotton County, OK, Jefferson County, OK, Archer County, TX, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 64 km from the middle of the area, began a volume at 06:02 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.

What was reported inside it

TimeReportWhereRemark
Jul 30, 1:15 AM CDTTSTM WND GST 59Sheppard Afb, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 29, 8:59 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.0 hours before the alert went out and 167 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 2009-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 915 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 2009-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
915 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1329 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOUN 300600
SVROUN
OKC033-067-TXC009-077-485-300700-
/O.NEW.KOUN.SV.W.0607.090730T0600Z-090730T0700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
100 AM CDT THU JUL 30 2009

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ARCHER COUNTY IN NORTHERN TEXAS...
  NORTHERN CLAY COUNTY IN NORTHERN TEXAS...
  SOUTHEASTERN WICHITA COUNTY IN NORTHERN TEXAS...
  WESTERN JEFFERSON COUNTY IN SOUTHERN OKLAHOMA...
  SOUTHERN COTTON COUNTY IN SOUTHWEST OKLAHOMA...

* UNTIL 200 AM CDT

* AT 1259 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 12 MILES NORTH OF
  COOKIETOWN TO 4 MILES EAST OF BURKBURNETT TO 3 MILES EAST OF
  KAMAY...MOVING EAST AT 40 MPH.

HAZARDS IN THE WARNING INCLUDE...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE BURKBURNETT...BYERS...CASHION...
  CHARLIE...COOKIETOWN...DEAN...HENRIETTA...HOLLIDAY...IOWA PARK...
  JOLLY...KAMAY...LAKE ARROWHEAD...LAKESIDE CITY...MANKINS...
  PETROLIA...PLEASANT VALLEY...RANDLETT...SCOTLAND...SHEPPARD AFB...
  TAYLOR AND WICHITA FALLS.


LAT...LON 3382 9892 3410 9863 3429 9847 3415 9798
      3377 9809 3363 9854
TIME...MOT...LOC 0559Z 284DEG 35KT 3445 9841 3407 9849
          3385 9876

$$
1 follow-up statement
000 
WWUS54 KOUN 300624
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
124 AM CDT THU JUL 30 2009

OKC033-067-TXC009-077-485-300700-
/O.CON.KOUN.SV.W.0607.000000T0000Z-090730T0700Z/
COTTON OK-JEFFERSON OK-WICHITA TX-CLAY TX-ARCHER TX-
124 AM CDT THU JUL 30 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT
FOR NORTHEASTERN ARCHER...NORTHERN CLAY...EASTERN WICHITA...WESTERN
JEFFERSON AND SOUTHERN COTTON COUNTIES...

AT 122 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTHEAST OF
BYERS TO JOLLY TO 8 MILES SOUTH OF HOLLIDAY...MOVING SOUTHEAST AT 35 
MPH.  A WIND GUST TO 60 MPH WAS REPORTED AT WICHITA FALLS AROUND
115 AM.

HAZARDS IN THE WARNING INCLUDE...
WIND GUSTS TO 60 MPH...

* LOCATIONS IN THE WARNING INCLUDE BURKBURNETT...BYERS...CASHION...
  CHARLIE...COOKIETOWN...DEAN...HENRIETTA...HOLLIDAY...IOWA PARK...
  JOLLY...KAMAY...LAKE ARROWHEAD...LAKESIDE CITY...MANKINS...
  PETROLIA...PLEASANT VALLEY...RANDLETT...SCOTLAND...SHEPPARD AFB...
  TAYLOR AND WICHITA FALLS.

LAT...LON 3381 9891 3409 9862 3428 9846 3415 9798
      3377 9809 3363 9854
TIME...MOT...LOC 0622Z 298DEG 30KT 3415 9813 3387 9831
          3371 9864

$$

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 8:36 PM CDTSevere Thunderstorm WarningOUNCuster, Dewey54 min
Jul 29, 9:20 PM CDTSevere Thunderstorm WarningOUNCaddo, Grady55 min
Jul 29, 9:28 PM CDTSevere Thunderstorm WarningOUNCuster, Washita62 min
Jul 29, 9:32 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills58 min
Jul 29, 10:04 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian, Grady56 min
Jul 29, 10:08 PM CDTSevere Thunderstorm WarningOUNWashita67 min
Jul 29, 10:28 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Roger Mills62 min
Jul 29, 10:39 PM CDTSevere Thunderstorm WarningOUNBeckham, Greer, Harmon, Jackson51 min
Jul 29, 10:58 PM CDTSevere Thunderstorm WarningOUNGreer, Harmon, Jackson, Kiowa, Tillman62 min
Jul 29, 11:06 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche54 min
Jul 29, 11:17 PM CDTAreal Flood AdvisoryOUNBeckham, Greer, Harmon, Kiowa, Washita4 hr
Jul 29, 11:18 PM CDTSevere Thunderstorm WarningOUNBeckham, Caddo, Comanche, Greer, Kiowa, Washita57 min
Jul 30, 12:01 AM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Jackson, Kiowa, Tillman59 min
Jul 30, 12:51 AM CDTAreal Flood AdvisoryOUNComanche, Grady4 hr
Jul 30, 1:33 AM CDTFlash Flood WarningOUNCaddo, Comanche, Grady4 hr
Jul 30, 3:14 AM CDTAreal Flood AdvisoryOUNBlaine, Kingfisher, Logan3 hr
Jul 30, 4:59 AM CDTAreal Flood AdvisoryOUNOklahoma2 hr
Jul 30, 5:45 AM CDTAreal Flood AdvisoryOUNLincoln3 hr
Jul 30, 6:02 AM CDTFlash Flood WarningOUNLincoln3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2009Severe Thunderstorm Warnings in Oklahoma, 2009Every severe thunderstorm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.