Alert archive / New Mexico / Flash Flood Warnings in 2021

Flash Flood Warning 39, NWS El Paso, TX

August 12, 2021Otero County, New Mexico

NWS El Paso, TX issued this flash flood warning at Aug 12, 2021, 3:08 PM MDT for Otero County, New Mexico. 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: Aug 12, 2021, 3:08 PM MDT (21:08 UTC)
Expired: Aug 12, 2021, 6:15 PM MDT
In force: 3 hr
Issued by: NWS El Paso, TX
Area: Storm-based polygon
Flood severity: None

County Otero County, NM

The radar

The Holloman AFB radar (KHDX), 97 km from the middle of the area, began a volume at 21:09 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

Santa Teresa, NM (KEPZ), launched 12:00Z, 9.1 hours before the alert went out and 111 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 794 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 896 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

127 
WGUS54 KEPZ 122108
FFWEPZ
NMC035-130015-
/O.NEW.KEPZ.FF.W.0039.210812T2108Z-210813T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service El Paso Tx/Santa Teresa NM
308 PM MDT Thu Aug 12 2021

The National Weather Service in El Paso Tx/Santa Teresa has issued a

* Flash Flood Warning for...
  South Central Otero County in south central New Mexico...

* Until 615 PM MDT.

* At 308 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Additional rainfall amounts up to 1 inch are possible 
  in the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  mainly rural areas of South Central Otero County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

In hilly terrain there are numerous of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Remain alert for flooding even in locations not receiving rain. 
Arroyos, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

&&

LAT...LON 3234 10570 3236 10561 3233 10559 3232 10556
      3228 10554 3227 10558 3229 10562 3226 10565
      3228 10570 3229 10570 3230 10569

FLASH FLOOD...RADAR INDICATED

$$

AB

The office that day

Everything else NWS El Paso, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 11:37 AM MDT	Areal Flood Advisory	EPZ	Otero	113 min
Aug 12, 11:41 AM MDT	Flood Watch	EPZ	Doña Ana, Grant, Hidalgo, Luna, Otero, Sierra	4 hr
Aug 12, 11:49 AM MDT	Areal Flood Advisory	EPZ	Otero	116 min
Aug 12, 12:03 PM MDT	Areal Flood Advisory	EPZ	Otero	3 hr
Aug 12, 12:21 PM MDT	Areal Flood Advisory	EPZ	Otero	3 hr
Aug 12, 2:16 PM MDT	Areal Flood Advisory	EPZ	Grant	119 min
Aug 12, 2:53 PM MDT	Areal Flood Advisory	EPZ	Otero	112 min
Aug 12, 3:14 PM MDT	Flash Flood Watch	EPZ	Doña Ana, Grant, Hidalgo, Luna, Otero, Sierra	4 days
Aug 12, 3:37 PM MDT	Areal Flood Advisory	EPZ	Luna	3 hr
Aug 12, 4:46 PM MDT	Areal Flood Advisory	EPZ	Otero	119 min

Nearby

Flash Flood Warnings in New Mexico, 2021 Every flash flood warning in 2021

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.