Alert archive / Oklahoma / Flash Flood Warnings in 1999
Flash Flood Warning 66, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Jun 20, 1999, 5:40 AM CDT for Mayes County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jun 20, 1999, 5:40 AM CDT (10:40 UTC)
- Expired
- Jun 20, 1999, 8:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Mayes County, OK
The radar
The Tulsa radar (KINX), 38 km from the middle of the area, began a volume at 10:42 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
Springfield, MO (KSGF), launched 00:00Z, 10.7 hours before the alert went out and 139 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1446 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 201046 FFWTUL OKC097-201330- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TULSA OK 540 AM CDT SUN JUN 20 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * FLASH FLOOD WARNING FOR MAYES COUNTY IN NORTHEAST OKLAHOMA * UNTIL 830 AM CDT * AT 540 AM CDT RADAR INDICATED THAT FROM 2 TO 4 INCHES OF RAIN HAD FALLEN FROM NEAR ADAIR TO SPAVINAW AND IN THE SALINA AND ROSE AREAS. PRYOR HAD RECEIVED AROUND 2 INCHES OF RAINFALL OVERNIGHT. RADAR SHOWED SLOW MOVING THUNDERSTORMS REMAINING OVER THE AREA WITH ANOTHER 1 TO 2 INCHES OF RAIN POSSIBLE EARLY THIS MORNING. LANGLEY...PENSACOLA...ADAIR...SPAVINAW...SALINA AND PRYOR AND ADJACENT COMMUNITIES MAY BE AFFECTED BY FLASH FLOODING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD BE PREPARED` TO MOVE TO HIGHER GROUND IF NEEDED. LAT...LON 3645 9533 3628 9533 3618 9504 3650 9504
What forecasters said that day
The local office's own words before this flash flood warning 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 flash flood warning went out at Jun 20, 4:00 AM CDT, 1 hour 40 minutes earlier.
Area forecast discussion, Jun 20, 4:00 AM CDT, 1 hour 40 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 400 AM CDT SUN JUN 20 1999 PROBLEM(S) OF THE DAY: WILL THE CONVECTION BE SCATTERED OR NUMEROUS? HOW MUCH RAIN WILL FALL? CLOUDS TEMPERATURES H85 WAA PATTERN OVER ERN OK THIS MORNING HAS RESULTED IN ADDITIONAL SHRA/TSRA ACTIVITY. MODELS IN DECENT AGREEMENT WITH ONE ANOTHER...BUT ALL HAVE PERFORMED POORLY IN HANDLING PRECIP AND CLOUDS THE LAST FEW RUNS. 00Z ETA HANDLES CURRENT PRECIP BEST...BUT DONT HAVE ANY FEEL FOR ONE MODEL OR THE OTHER. ALL AGREE HOWEVER THAT WAA/ISENTROPIC LIFT SHUTS OFF BY THIS AFTERNOON. WILL CONFINE POPS OVER MOST ZONES TO MORNING AND GO AHEAD WITH HIGHEST POPS IN ERN ZONES. WONT USE ANY TEMPORAL WORDING ACROSS SE OK AND WC AR AS MORE SUN AND HIGHER INSTABILITIES MAY LEAD TO SOME TSRA THIS AFTERNOON. ATMOSPHERE LOOKS TO REMAIN WEAKLY CAPPED FOR MONDAY. NO REAL FOCUS FOR CONVECTIVE INITIATION BUT A FEW LATE AFT STORMS WILL BE POSSIBLE...ESP OVER SE OK AND NW AR. WILL GO AHEAD AND BROADBRUSH ALL ZONES WITH SLIGHT CHANCE POPS MON AND MON EVE. AS FOR TEMPERATURES...UNDERCUT GUIDANCE FOR FIRST PERIOD TO ACCOUNT FOR MORE CLOUD COVER. THINK SE OK AND WC AR WILL SEE MORE SUN SO DID NOT DEVIATE AS MUCH. LATER PERIODS LOOK FAIRLY RESONABLE SO WILL STICK FAIRLY CLOSE. IN THE EXTENDED...WEAKLY CAPPED ATMOSPHERE REMAINS IN PLACE THROUGH EXTENDED PERIOD. MODEL SOLUTIONS VARY TO SOME DEGREE WITH PLACEMENT ANS STRENGTH OF UPPER RIDGE. MODELS HAVE CONTINUED TO SUPPRESS RIDGE TO THE SW U.S. STILL NO REAL FOCUS FOR CONVECTION BUT A WEAKLY CAPPED ENVIRONMENT MAY LEAD TO SCT AFTERNOON TSRA WILL GO WITH SLIGHT CHANCE POPS. FCSTID = 23 TUL 81 68 87 69 / 40 10 20 20 FSM 82 67 88 67 / 70 20 20 20 MLC 84 67 88 67 / 30 20 20 20 BVO 81 65 87 67 / 40 10 20 20 FYV 79 63 85 66 / 70 10 20 20 IDB 87 65 89 66 / 20 20 20 20 BYV 79 63 85 66 / 70 10 20 20 MIO 80 65 86 66 / 70 10 20 20 MKO 81 68 87 69 / 40 10 20 20 F10 81 68 87 69 / 40 10 20 20 HHW 87 65 89 66 / 20 20 20 20 .TUL... AR...NONE. OK...NONE. -------------------- EXPERIMENTAL OUTPUT: HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: NONE NGM CONFIDENCE: 5 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 5 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 5 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 5 ON A SCALE OF 0 TO 10
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 4:15 AM CDT | Flash Flood Warning | TSA | Cherokee | 3 hr |
| Jun 20, 6:49 AM CDT | Flash Flood Warning | TSA | Cherokee | 2 hr |
| Jun 20, 7:50 AM CDT | Flash Flood Warning | TSA | Rogers | 3 hr |
| Jun 20, 7:58 AM CDT | Flash Flood Warning | TSA | Craig | 3 hr |
| Jun 20, 8:21 AM CDT | Flash Flood Warning | TSA | Cherokee, Mayes | 2 hr |
| Jun 20, 10:45 AM CDT | Flash Flood Warning | TSA | Craig, Nowata, Rogers | 2 hr |
Nearby
Flash Flood Warnings in Oklahoma, 1999Every flash flood warning in 1999
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.