Alert archive / Oklahoma / Flash Flood Watches in 2016

Flash Flood Watch 1, NWS Norman, OK

March 7, 201611 counties in Oklahoma

NWS Norman, OK issued this flash flood watch at Mar 7, 2016, 9:07 PM CST for 11 counties in Oklahoma. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued
Mar 7, 2016, 9:07 PM CST (03:07 UTC)
Expired
Mar 9, 2016, 2:13 AM CST
In force
29 hr
Issued by
NWS Norman, OK
Flood severity
None

Counties Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Hughes County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 114 km from the middle of the area, began a volume at 03:09 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 00:00Z, 3.1 hours before the alert went out and 110 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, Norman, OK at 00:00Z on 2016-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 258 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, Norman, OK at 00:00Z on 2016-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 329 square meters per square second.1939587897Sfc1 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
258 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
676 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
329 m²/s²
0-3 km storm-relative helicity
349 m²/s²
Significant tornado parameter
0.3
Supercell composite
7.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 7, 5:26 PM CST, 3 hours 41 minutes earlier.

Area forecast discussion, Mar 7, 5:26 PM CST, 3 hours 41 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Mar 7, 7:45 PM CST, 1 hour 22 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
745 PM CST MON MAR 7 2016

OKZ004>048-050>052-TXZ083>090-090145-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
745 PM CST MON MAR 7 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...TONIGHT...

.THUNDERSTORMS...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING INTO
TUESDAY MORNING ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH
TEXAS.

LOCATION...
THE SLIGHT RISK IS SOUTH OF A LINE FROM QUANAH TEXAS... TO ALTUS
OKLAHOMA... TO MOORE OKLAHOMA...TO HOLDENVILLE OKLAHOMA. A
MARGINAL RISK SURROUNDS THE SLIGHT RISK... AND IS EAST OF A LINE
FROM BUFFALO... TO SHATTUCK OKLAHOMA.

TIMING...
SEVERE STORMS WILL BE POSSIBLE THROUGH TUESDAY MORNING. HOWEVER...
THE MOST LIKELY TIME FOR SEVERE STORMS WILL BE AFTER MIDNIGHT.

IMPACTS...
THE STRONGEST STORMS WILL BE CAPABLE OF HAIL UP TO THE SIZE OF
GOLF BALLS... DAMAGING WIND GUSTS BETWEEN 60 AND 70 MPH... AND
LOCALLY HEAVY RAINFALL THAT MAY LEAD TO FLASH FLOODING. THERE IS A
LOW CHANCE OF TORNADOES IN PARTS OF SOUTHERN OKLAHOMA AND WESTERN
NORTH TEXAS.

DISCUSSION...
A FEW STORMS MAY DEVELOP NEAR A DRYLINE IN PARTS OF WESTERN
OKLAHOMA AND WESTERN NORTH TEXAS LATE THIS EVENING. IF THESE
STORMS DEVELOP... THEY COULD BECOME SEVERE... PRODUCING LARGE
HAIL AND STRONG WIND GUSTS.

SHOWERS AND THUNDERSTORMS ACROSS NORTHERN TEXAS WILL CONTINUE TO
DEVELOP AND SPREAD NORTHWARD INTO OKLAHOMA AND WESTERN NORTH TEXAS
TONIGHT INTO TUESDAY MORNING. THESE STORMS WILL BE CAPABLE OF
SEVERE WEATHER...INCLUDING LARGE HAIL...STRONG WIND GUSTS...AND A
LOW RISK OF TORNADOES.

.SPOTTER AND EMERGENCY MANAGEMENT INFORMATION STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THROUGH
TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

.THUNDERSTORMS...
THE CHANCE FOR THUNDERSTORMS WILL CONTINUE TUESDAY THROUGH FRIDAY.
THERE IS A SLIGHT RISK OF SEVERE STORMS ON TUESDAY ACROSS PORTIONS
OF CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS. THE
STRONGEST STORMS WILL BE CAPABLE OF... LARGE HAIL UP TO THE SIZE
OF GOLF BALLS... DAMAGING WIND GUSTS... LOCALLY HEAVY RAINFALL...
ALONG WITH A LOW RISK OF TORNADOES.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

KURTZ/EM/MAHALE

In the hours before

Special weather statement, Mar 7, 6:57 PM CST, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
657 PM CST MON MAR 7 2016

OKZ005-010-080130-
WOODS OK-WOODWARD OK-
657 PM CST MON MAR 7 2016

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL WOODS AND
NORTHEASTERN WOODWARD COUNTIES UNTIL 730 PM CST...

AT 655 PM CST...A STRONG THUNDERSTORM WAS LOCATED 6 MILES NORTHWEST
OF MOORELAND...MOVING NORTH-NORTHEAST AT 35 MPH. THIS STORM IS
MOVING TOWARD ALABASTER CAVERNS STATE PARK.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...

LAT...LON 3679 9899 3645 9923 3648 9934 3660 9932
      3660 9929 3670 9930 3685 9927
TIME...MOT...LOC 0055Z 198DEG 30KT 3651 9929

..SPEG.
Special weather statement, Mar 7, 8:54 PM CST, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
854 PM CST MON MAR 7 2016

OKZ051-052-080330-
BRYAN OK-MARSHALL OK-
854 PM CST MON MAR 7 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BRYAN AND
SOUTHEASTERN MARSHALL COUNTIES UNTIL 930 PM CST...

AT 851 PM CST...A STRONG THUNDERSTORM WAS LOCATED 4 MILES WEST OF
POTTSBORO TEXAS...MOVING NORTHEAST AT 50 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
HAIL UP TO ONE-HALF INCH DIAMETER...

LAT...LON 3382 9653 3382 9658 3385 9663 3389 9659
      3390 9663 3392 9666 3391 9668 3385 9669
      3383 9671 3383 9676 3387 9680 3387 9683
      3385 9685 3386 9688 3407 9650 3403 9631
      3384 9626 3378 9644 3377 9650
TIME...MOT...LOC 0251Z 236DEG 43KT 3379 9675

..SPEG.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 7, 6:57 PM CSTSpecial Weather StatementOUNWoodward33 min
Mar 7, 8:54 PM CSTSpecial Weather StatementOUNMarshall36 min
Mar 7, 9:31 PM CSTSpecial Weather StatementOUNAtoka, Bryan44 min
Mar 7, 9:35 PM CSTSpecial Weather StatementOUNSeminole25 min
Mar 7, 10:10 PM CSTSevere Thunderstorm WarningOUNAtoka, Coal, Hughes, Johnston, Pontotoc50 min
Mar 7, 10:17 PM CSTSpecial Weather StatementOUNAtoka28 min
Mar 7, 10:28 PM CSTSpecial Weather StatementOUNHughes, Pontotoc, Seminole47 min
Mar 7, 10:34 PM CSTAreal Flood AdvisoryOUNMurray116 min
Mar 8, 5:36 AM CSTSpecial Weather StatementOUNGreer, Harmon24 min
Mar 8, 6:12 AM CSTSpecial Weather StatementOUNCuster, Greer, Kiowa, Washita33 min
Mar 8, 7:13 AM CSTSpecial Weather StatementOUNCaddo, Kiowa32 min
Mar 8, 7:32 AM CSTRiver Flood WarningOUNBryan40 hr
Mar 8, 7:41 AM CSTRiver Flood WarningOUNAtoka, Bryan3 days
Mar 8, 8:36 AM CSTSpecial Weather StatementOUNCanadian24 min
Mar 8, 8:38 AM CSTAreal Flood AdvisoryOUNBeckham, Caddo, Custer, Greer, Jackson, Kiowa and 1 more3 hr
Mar 8, 8:45 AM CSTSpecial Weather StatementOUNStephens30 min
Mar 8, 8:59 AM CSTSpecial Weather StatementOUNOklahoma31 min
Mar 8, 9:07 AM CSTSpecial Weather StatementOUNOklahoma23 min
Mar 8, 9:19 AM CSTAreal Flood AdvisoryOUNBryan, Carter, Garvin, Johnston, Love, Marshall and 2 more3 hr
Mar 8, 9:27 AM CSTSevere Thunderstorm WarningOUNBryan, Carter, Johnston, Love, Marshall48 min
Mar 8, 9:37 AM CSTSpecial Weather StatementOUNOklahoma23 min
Mar 8, 9:47 AM CSTAreal Flood AdvisoryOUNCleveland3 hr
Mar 8, 10:07 AM CSTSpecial Weather StatementOUNAtoka, Coal, Johnston23 min
Mar 8, 10:20 AM CSTAreal Flood AdvisoryOUNAtoka, Bryan, Coal, Hughes, Johnston, Pontotoc and 1 more3 hr
Mar 8, 10:31 AM CSTSpecial Weather StatementOUNCoal, Pontotoc29 min
Mar 8, 11:01 AM CSTAreal Flood AdvisoryOUNAtoka, Bryan, Coal, Hughes3 hr
Mar 8, 11:02 AM CSTSpecial Weather StatementOUNAtoka28 min
Mar 8, 5:00 AM CSTSpecial Weather StatementOUNHardeman30 min
Mar 8, 5:53 AM CSTSpecial Weather StatementOUNHardeman37 min

Nearby

Flash Flood Watches in Oklahoma, 2016Every flash flood watch in 2016

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.