Alert archive / Oklahoma / Heat Advisories in 2012
Heat Advisory 3, NWS Norman, OK
NWS Norman, OK issued this heat advisory at Jul 27, 2012, 3:08 PM CDT for 48 counties in Oklahoma; 8 counties in Texas. It took effect at Jul 28, 2012, 1:00 PM CDT. It was in force for 8 days.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2012, 3:08 PM CDT (20:08 UTC)
- In effect from
- Jul 28, 2012, 1:00 PM CDT
- Expired
- Aug 5, 2012, 9:00 PM CDT
- In force
- 8 days
- Issued by
- NWS Norman, OK
All 56 counties
Alfalfa County, OK, Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 20:08 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
Norman, OK (KOUN), launched 12:00Z, 8.1 hours before the alert went out and 67 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
- 70 J/kg
- Mixed-layer CIN
- -198 J/kg
- Mixed-layer LCL
- 1897 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Norman, OK wrote its last area forecast discussion before this heat advisory went out at Jul 27, 2:59 PM CDT, 9 minutes earlier.
Area forecast discussion, Jul 27, 2:59 PM CDT, 9 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
259 PM CDT FRI JUL 27 2012
.DISCUSSION...
ISOLATED SHOWERS AND THUNDERSTORMS HAVE DEVELOPED OVER SOUTHERN
OK THIS AFTERNOON WITHIN BETTER MID LEVEL THETAE. NORTH OF THE OK
STATE LINE...A WEAK COLD FRONT WAS TRYING TO NUDGE INTO NE OK
WITH A CU FIELD STRETCHING ALONG IT. ANOTHER WEAK SFC CONVERGENCE
ZONE EXTENDED FROM NORTHWEST OK NEAR GAG THROUGH OUN. ALTHOUGH
GENERAL LIFT WILL REMAIN VERY LIMITED AND DIURNALLY
DRIVEN...ISOLATED T HAS BEEN INCLUDED THROUGH SUNSET NEAR THE
PREVIOUSLY MENTIONED ZONES.
TOMORROW...RAIN CHANCES WILL DROP TO ZERO AS THE MID TO UPPER
RIDGE CONTINUES TO SLIDE EAST AND AMPLIFY DIRECTLY OVER OK. TEMPS
WILL CONTINUE TO INCREASE TOMORROW AS THIS RIDGE MOVES OVERHEAD.
THE 850MB THERMAL RIDGE WILL BEGIN TO INTENSIFY EACH DAY THROUGH
EARLY NEXT WEEK WITHIN DOWNSLOPE SOUTHWESTERLY FLOW...ESPECIALLY
BY MONDAY AHEAD OF ANOTHER APPROACHING WEAK COLD FRONT MOVING INTO
KS. THE GFS AGAIN APPEARS TO COOL BOTH IN THE SHORT AND EXTENDED.
WILL TREND AT LEAST THE HIGH TEMPS CLOSER TO THE MET IN THE
SHORT...AND THE ECMWF AND DGEX FOR THE EXTENDED. THESE TEMPS LOOK
MUCH MORE REASONABLE GIVEN THE TREND TOWARDS DRIER BOUNDARY LAYER
CONDITIONS (ESPECIALLY WEST OF I35) AND PERSISTENT SW FLOW 1-2KM
SW FLOW. HEAT INDEX VALUES WILL EXCEED 105 FOR MANY LOCATIONS
TOMORROW AND SUNDAY...AND LOWS WILL ALSO REMAIN ABOVE 75 DEGREES
SO WE ISSUE A HEAT ADVISORY THROUGH THIS WEEKEND. EXPECT THIS
ADVISORY WILL MOST LIKELY BE EXTENDED THROUGH AT LEAST MONDAY IF
CONFIDENCE REMAINS HIGH ENOUGH WITH REGARDS TO HEAT INDEX VALUES
EXCEEDING 110 FOR SOME LOCATIONS ACROSS CENTRAL AND NORTHERN OK.
&&
.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK 75 103 72 105 / 0 0 10 0
HOBART OK 75 104 73 106 / 0 0 10 0
WICHITA FALLS TX 75 104 74 107 / 10 0 10 0
GAGE OK 70 102 70 104 / 10 0 10 0
PONCA CITY OK 74 106 77 105 / 0 0 10 10
DURANT OK 75 101 75 103 / 10 0 10 10
&&
.OUN WATCHES/WARNINGS/ADVISORIES...
OK...HEAT ADVISORY FROM 1 PM SATURDAY TO 7 PM CDT SUNDAY FOR
OKZ004>048-050>052.
TX...HEAT ADVISORY FROM 1 PM SATURDAY TO 7 PM CDT SUNDAY FOR
TXZ083>090.
&&
84/03Hazardous weather outlook, Jul 27, 12:03 PM CDT, 3 hours 5 minutes before
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</html>In the hours before
Local storm report, Jul 27, 12:53 PM CDT, 2 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NORMAN OK
1253 PM CDT FRI JUL 27 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM TSTM WND GST 5 NE DICKSON 34.24N 96.93W
07/26/2012 E60.00 MPH JOHNSTON OK PUBLIC
0525 PM TSTM WND DMG 1 S HOLDENVILLE 35.07N 96.40W
07/26/2012 HUGHES OK FIRE DEPT/RESCUE
LARGE TREES BLOWN DOWN,DAMAGING HOUSES.
0542 PM TSTM WND GST 3 SW DURANT 33.96N 96.41W
07/26/2012 M61.00 MPH BRYAN OK AWOS
0545 PM TSTM WND DMG DURANT 33.99N 96.38W
07/26/2012 BRYAN OK LAW ENFORCEMENT
DURANT POLICE DEPARTMENT REPORTS POWER LINES DOWNED AND
AT LEAST 6 TREES DOWNED ON ROADWAYS OR HOUSES.
0546 PM TSTM WND GST 2 SW DURANT 33.97N 96.40W
07/26/2012 M72.00 MPH BRYAN OK AWOS
WIND 19030G63KT.
0555 PM TSTM WND GST 2 SW DURANT 33.98N 96.41W
07/26/2012 M70.00 MPH BRYAN OK AWOS
NUMEROUS TREES DOWN IN CALERA, REPORTED BY CALERA FD.
&&
OUNSpecial weather statement, Jul 27, 2:28 PM CDT, 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 228 PM CDT FRI JUL 27 2012 OKZ041-046-272000- MURRAY OK-CARTER OK- 228 PM CDT FRI JUL 27 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MURRAY AND NORTHWESTERN CARTER COUNTIES UNTIL 300 PM CDT... AT 223 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR POOLEVILLE... DRIFTING SOUTHWEST AT 5 MPH. HAZARDS INCLUDE... WIND GUSTS TO 50 MPH... MINOR FLOODING IN AREAS OF POOR DRAINAGE... FREQUENT CLOUD TO GROUND LIGHTNING... LOCATIONS IMPACTED INCLUDE... MILO AND POOLEVILLE. LAT...LON 3443 9750 3450 9731 3438 9717 3426 9733 TIME...MOT...LOC 1923Z 50DEG 4KT 3442 9732 AUSTIN
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 7:01 PM CDT | Special Weather Statement | OUN | Seminole | 29 min |
| Jul 26, 9:07 PM CDT | Special Weather Statement | OUN | Ellis | 23 min |
| Jul 26, 9:08 PM CDT | Special Weather Statement | OUN | Custer | 37 min |
| Jul 27, 2:28 PM CDT | Special Weather Statement | OUN | Carter | 32 min |
| Jul 27, 3:47 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson | 28 min |
| Jul 27, 4:10 PM CDT | Special Weather Statement | OUN | Marshall | 35 min |
| Jul 27, 4:54 PM CDT | Special Weather Statement | OUN | Grady | 36 min |
| Jul 27, 5:14 PM CDT | Special Weather Statement | OUN | Johnston, Murray | 31 min |
| Jul 27, 5:32 PM CDT | Special Weather Statement | OUN | Grady | 28 min |
| Jul 27, 5:53 PM CDT | Special Weather Statement | OUN | Murray | 37 min |
| Jul 27, 4:33 PM CDT | Special Weather Statement | OUN | Clay | 27 min |
| Jul 27, 5:03 PM CDT | Special Weather Statement | OUN | Wichita | 27 min |
Nearby
Heat Advisories in Oklahoma, 2012Heat Advisories in Texas, 2012Every heat advisory 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.