Alert archive / Oklahoma / Special Weather Statements in 2012
Special Weather Statement, NWS Tulsa, OK
NWS Tulsa, OK issued this special weather statement at Jul 21, 2012, 4:21 PM CDT for Choctaw County, Oklahoma. It was in force for 24 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 21, 2012, 4:21 PM CDT (21:21 UTC)
- Expired
- Jul 21, 2012, 4:45 PM CDT
- In force
- 24 min
- Issued by
- NWS Tulsa, OK
County Choctaw County, OK
The radar
The Western Arkansas radar (KSRX), 164 km from the middle of the area, began a volume at 21:24 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 12:00Z, 9.4 hours before the alert went out and 223 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.
- Mixed-layer CAPE
- 534 J/kg
- Mixed-layer CIN
- -230 J/kg
- Mixed-layer LCL
- 2199 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Jul 21, 3:53 PM CDT, 28 minutes earlier.
Area forecast discussion, Jul 21, 3:53 PM CDT, 28 minutes before
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</html>Hazardous weather outlook, Jul 21, 12:45 PM CDT, 3 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1245 PM CDT SAT JUL 21 2012
ARZ001-002-010-011-019-020-029-OKZ049-053>076-221000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
1245 PM CDT SAT JUL 21 2012
...DANGEROUS HEAT CONTINUES THIS AFTERNOON...
THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
DANGEROUS HEAT.
RISK...ELEVATED.
AREA...EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS.
ONSET...ONGOING.
FIRE WEATHER DANGER.
RISK...LIMITED.
AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.
DISCUSSION...
DANGEROUS TRIPLE DIGIT HEAT WILL PERSIST THIS AFTERNOON WITH
WIDESPREAD HEAT INDICES AROUND 105 DEGREES ACROSS EASTERN OKLAHOMA
AND WEST CENTRAL ARKANSAS...WITH LOCALIZED AREAS APPROACHING 110
DEGREES.
A LIMITED FIRE DANGER WILL ALSO PERSIST AS DRY FUELS REMAIN
WITH AFTERNOON RELATIVE HUMIDITIES BETWEEN 20 AND 30 PERCENT.
SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION NOT EXPECTED.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
SUNDAY THROUGH THURSDAY...VERY HIGH FIRE WEATHER POTENTIAL...
DANGEROUS HEAT POTENTIAL.
FRIDAY...DANGEROUS HEAT POTENTIAL.
EXTENDED DISCUSSION...
TRIPLE DIGIT HEAT WILL PERSIST WELL INTO NEXT WEEK...AS UPPER
LEVEL RIDGING REMAINS IN CONTROL OF THE WEATHER PATTERN. HEAT
INDICES NEAR 105 WILL BE POSSIBLE THROUGH THIS TIME PERIOD FOR
PORTIONS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THE CONTINUED
HOT AND DRY CONDITIONS WILL ALSO KEEP AT LEAST A LIMITED FIRE
DANGER ACROSS THE AREA.
EMERGENCY MANAGEMENT PLANNING STATEMENT...
REMAIN PREPARED TO RESPOND TO HEAT RELATED ILLNESSES AND OTHER
CONDITIONS RELATING TO PROLONGED HEAT.
WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.In the hours before
Special weather statement, Jul 21, 4:21 PM CDT, 0 minutes before
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</html>Nearby
Special Weather Statements in Oklahoma, 2012Every special weather statement in 2012
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.