Alert archive / Texas / Flash Flood Warnings in 2018

Flash Flood Warning 45, NWS Midland/Odessa, TX

September 21, 2018Reagan County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Sep 21, 2018, 4:15 AM CDT for Reagan County, Texas. 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 as issued.

The facts

Issued
Sep 21, 2018, 4:15 AM CDT (09:15 UTC)
Expired
Sep 21, 2018, 7:15 AM CDT
In force
3 hr
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon
Flood severity
None

County Reagan County, TX

The radar

The Midland/Odessa radar (KMAF), 97 km from the middle of the area, began a volume at 09:17 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

Midland Regional, TX (KMAF), launched 00:00Z, 9.3 hours before the alert went out and 98 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, Midland Regional, TX at 00:00Z on 2018-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 00:00Z on 2018-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.1939Sfc1 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
42 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1362 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
-10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

406 
WGUS54 KMAF 210915
FFWMAF
TXC383-211215-
/O.NEW.KMAF.FF.W.0045.180921T0915Z-180921T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Midland/Odessa TX
415 AM CDT FRI SEP 21 2018

The National Weather Service in Midland has issued a

* Flash Flood Warning for...
  Reagan County in western Texas...

* Until 715 AM CDT.

* At 415 AM CDT, Doppler radar and automated rain gauges indicated
  heavy rain falling across the warned area. Flash flooding is
  expected.

* Some locations that will experience flooding include...
  Big Lake, Reagan County Airport, Best and Stiles. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3108 10177 3135 10177 3165 10127 3108 10127

$$

29
1 follow-up statement
029 
WGUS74 KMAF 211034
FFSMAF

Flash Flood Statement
National Weather Service Midland/Odessa TX
534 AM CDT FRI SEP 21 2018

TXC383-211215-
/O.CON.KMAF.FF.W.0045.000000T0000Z-180921T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Reagan TX-
534 AM CDT FRI SEP 21 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 AM CDT FOR
REAGAN COUNTY...

At 533 AM CDT, gauge reports indicated heavy rain was falling over 
the warned area.  Over 3 inches of rain was reported at the Big Lake 
Mesonet since midnight. The threat of flash flooding continues.

Some locations that will experience flooding include...
Big Lake, Reagan County Airport, Best and Stiles. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3108 10177 3135 10177 3165 10127 3108 10127

$$

29

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 20, 9:12 PM CDTAreal Flood AdvisoryMAFCrane, Pecos, Reeves, Ward3 hr
Sep 20, 9:43 PM CDTAreal Flood AdvisoryMAFEctor, Midland3 hr
Sep 20, 10:02 PM CDTAreal Flood AdvisoryMAFPecos3 hr
Sep 21, 2:39 AM CDTAreal Flood AdvisoryMAFPecos, Reagan, Terrell, Upton3 hr
Sep 21, 3:43 AM CDTAreal Flood AdvisoryMAFBorden, Dawson3 hr
Sep 21, 7:19 AM CDTAreal Flood WarningMAFReagan3 hr
Sep 21, 2:59 PM CDTHigh Wind WarningMAF14 hr

Nearby

Flash Flood Warnings in Texas, 2018Every flash flood warning in 2018

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.