Alert archive / Oklahoma / Flash Flood Warnings in 2011
Flash Flood Warning 70, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Nov 21, 2011, 2:27 AM CST for LeFlore County, Pushmataha County, Oklahoma. It was in force for 6 hr. 2 reports 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
- Nov 21, 2011, 2:27 AM CST (08:27 UTC)
- Expired
- Nov 21, 2011, 8:30 AM CST
- In force
- 6 hr
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
- Flood severity
- None
Counties LeFlore County, OK, Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 120 km from the middle of the area, began a volume at 08:29 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 21, 3:00 AM CST | FLASH FLOOD | 3 Nw Nashoba, OK | CRIPPLE CREEK WAS OUT OF BANKS FOR A SHORT WHILE JUST WEST OF NASHOBA. BLACK FORK CREEK BANKFULL UNDER STATE HWY 141 WEST OF NASHOBA. SEVERAL RURAL ROADS IMPASSABLE EARLY THIS MORNING DUE TO HIGH WATER BETWEEN NASHOBA AND CLAYTON. |
| Nov 21, 3:00 AM CST | FLASH FLOOD | Nashoba, OK | MANY LOW WATER CROSSINGS WERE UNDER WATER AROUND AND NORTHEAST OF NASHOBA. RELAYED FROM STORE OWNER FROM REPORTS BY CUSTOMERS THIS MORNING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 8.5 hours before the alert went out and 200 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
- 14 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 403 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 208 m²/s²
- 0-3 km storm-relative helicity
- 285 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
The text
As transmitted, in the capitals the NWS used until 2016.
995
WGUS54 KTSA 210827
FFWTSA
OKC079-127-211430-
/O.NEW.KTSA.FF.W.0070.111121T0827Z-111121T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
227 AM CST MON NOV 21 2011
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA...
SOUTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA...
* UNTIL 830 AM CST
* AT 227 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED AREA. 1 TO 3
OF RAINFALL HAS ALREADY OCCURRED WITH AN ADDITIONAL 1 TO 2 INCHES
POSSIBLE.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
CLAYTON...ALBION...BIG CEDAR...CLAYTON LAKE STATE PARK...DUNBAR...
KIAMICHI...MUSE...NASHOBA...OCTAVIA...STANLEY...TUSKAHOMA AND
WHITESBORO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 3449 9579 3452 9575 3451 9568 3457 9568
3460 9563 3460 9552 3468 9551 3468 9506
3475 9506 3485 9444 3450 9447 3450 9504
3446 9504 3441 9579
$$2 follow-up statements
064
WGUS74 KTSA 211134
FFSTSA
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
534 AM CST MON NOV 21 2011
OKC079-127-211430-
/O.CON.KTSA.FF.W.0070.000000T0000Z-111121T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LE FLORE OK-PUSHMATAHA OK-
534 AM CST MON NOV 21 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN PUSHMATAHA AND
SOUTHERN LE FLORE COUNTIES UNTIL 830 AM CST...
AT 533 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
SCATTERED SHOWERS CONTINUED OVER SOUTHERN LE FLORE COUNTY. ALTHOUGH
ADDITIONAL RAINFALL IS EXPECTED TO REMAIN LESS THAN ONE HALF
INCH...1 TO 4 INCHES OF RAIN FELL DURING THE EARLY MORNING HOURS AND
FLOODING OF LOW LYING AREAS WILL LIKELY CONTINUE.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CLAYTON...ALBION...BIG CEDAR...CLAYTON LAKE STATE PARK...DUNBAR...
KIAMICHI...MUSE...NASHOBA...OCTAVIA...STANLEY...TUSKAHOMA AND
WHITESBORO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD TO
UNKNOWN DEPTHS. IT ONLY TAKES TWO FEET OF RUSHING WATER TO CARRY AWAY
MOST SPORT UTILITY VEHICLES AND PICKUPS. TAKE A DIFFERENT ROUTE TO
REACH YOUR DESTINATION OR WAIT UNTIL THE WATER RECEDES. REMEMBER...
MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN TULSA.
&&
LAT...LON 3449 9579 3452 9575 3451 9568 3457 9568
3460 9563 3460 9552 3468 9551 3468 9506
3475 9506 3485 9444 3450 9447 3450 9504
3446 9504 3441 9579
$$955
WGUS74 KTSA 211426
FFSTSA
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
826 AM CST MON NOV 21 2011
OKC079-127-211441-
/O.EXP.KTSA.FF.W.0070.000000T0000Z-111121T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LE FLORE OK-PUSHMATAHA OK-
826 AM CST MON NOV 21 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN PUSHMATAHA
AND SOUTHERN LE FLORE COUNTIES WILL BE ALLOWED TO EXPIRE AT 830 AM
CST...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 3449 9579 3452 9575 3451 9568 3457 9568
3460 9563 3460 9552 3468 9551 3468 9506
3475 9506 3485 9444 3450 9447 3450 9504
3446 9504 3441 9579
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 6:26 PM CST | Special Weather Statement | TSA | Okmulgee | 49 min |
| Nov 20, 7:43 PM CST | Special Weather Statement | TSA | Creek | 47 min |
| Nov 20, 8:12 PM CST | Special Weather Statement | TSA | Tulsa | 48 min |
| Nov 20, 8:43 PM CST | Special Weather Statement | TSA | Tulsa | 47 min |
| Nov 20, 9:31 PM CST | Special Weather Statement | TSA | Pushmataha | 44 min |
| Nov 20, 10:25 PM CST | Severe Thunderstorm Warning | TSA | Latimer | 23 min |
| Nov 21, 1:50 AM CST | Areal Flood Advisory | TSA | LeFlore, Pushmataha | 115 min |
Nearby
Flash Flood Warnings in Oklahoma, 2011Every flash flood warning in 2011
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.