Alert archive / New Mexico / Special Weather Statements in 2021

Special Weather Statement, NWS Albuquerque, NM

July 31, 2021Harding County, New Mexico

NWS Albuquerque, NM issued this special weather statement at Jul 31, 2021, 1:37 PM MDT for Harding County, New Mexico. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 31, 2021, 1:37 PM MDT (19:37 UTC)
Expired
Jul 31, 2021, 2:00 PM MDT
In force
23 min
Issued by
NWS Albuquerque, NM

County Harding County, NM

The radar

The Cannon AFB radar (KFDX), 139 km from the middle of the area, began a volume at 19:41 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 7.6 hours before the alert went out and 234 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, Amarillo Airport, TX at 12:00Z on 2021-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 387 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, Amarillo Airport, TX at 12:00Z on 2021-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
387 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
1831 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Albuquerque, NM wrote its last area forecast discussion before this special weather statement went out at Jul 31, 12:18 PM MDT, 1 hour 19 minutes earlier.

Area forecast discussion, Jul 31, 12:18 PM MDT, 1 hour 19 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Albuquerque NM
1218 PM MDT Sat Jul 31 2021

.AVIATION...
18Z TAF CYCLE
Scattered to numerous showers and thunderstorms are expected this
afternoon and evening, then scattered to isolated activity is
forecast to linger after midnight along and east of the central
mountain chain. A loosely organized high pressure system aloft will
result in slow and erratic storm motions. Meanwhile, a moist backdoor
front will continue advancing southwestward across eastern and
central areas triggering thunderstorms with wet microbursts and
locally heavy rainfall. The front will push through gaps in the
central mountain chain this afternoon and evening with a moderately
gusty east wind below canyons opening into the central valley from
Taos southward through Santa Fe and Albuquerque.

44

&&

.PREV DISCUSSION...329 AM MDT Sat Jul 31 2021...
.SYNOPSIS...
Thunderstorm coverage will ramp up this weekend, especially across the
northeast quarter later today and areawide Sunday and Sunday night.
A moist backdoor cold front pushing into the northeast part of New
Mexico will help to focus locally heavy thunderstorm rainfall there
this afternoon. The front will then press south and west tonight
through Sunday with showers and thunderstorms becoming more widespread
areawide. Locally heavy rainfall will result in an elevated flash flood
threat to close out the weekend. An active monsoon pattern will persist
into Monday and Tuesday before a transition to fewer storms by the
latter half of next week. High temperatures near to slightly below
average today will trend 5 to 15 degrees cooler on Sunday and remain
below average through Tuesday.

&&

.DISCUSSION...
SHORT TERM...(TODAY THROUGH SUNDAY)...
After a break in the extent of showers and thunderstorms Friday,
convection will become more widespread again through this weekend.
The culprit for the increased activity is a back door cold front
that will enter northeast NM this morning, stall this afternoon,
then move quickly south and west tonight, reaching the Rio Grande
Valley around midnight. Moderate wind speeds are expected through
the gaps and passes of the central mountain chain. Favored areas for
thunderstorms today is the northern mountains, but especially the
Sangre de Cristo Mountains. The northeast will be favored tonight
behind the cold front. We have decided to expand the Flash Flood
Watch to include all of the northeast highlands, and the northeast
plains, and have the watch continue until 6:00am Sunday.

Sunday should be even more active with widespread showers and
thunderstorms, some with heavy rain. A Flash Flood Watch will likely
be needed Sunday. The exception could be in the northeast, where
conditions will become more stable. CHJ

LONG TERM...(SUNDAY NIGHT THROUGH SATURDAY)...

...Flash flood potential to remain elevated Sunday PM through
Tuesday especially for areas between the Divide and east
slopes of the central mountain chain...

High grade monsoon pattern continues Sunday night through at least
Tuesday. Synoptic-scale frontal boundary should reach the
Continental Divide later Sunday becoming effectively stationary
Sunday night along or just west of the Divide. Atmospheric moisture
levels in wake of this easterly push will be well-above average.
Forecast PWAT values of 1.2 to 1.4 inches are nearly two sigmas above
the mean for August 1st. Steering winds will be very weak and
generally from the north with the upper-level ridge near the NM/AZ
line. Slow-moving storms capable of intense heavy rainfall will be of
particular concern given that low-level forcing for lift will be
quite efficient well after dark Sunday evening in wake of the front
especially along the east slopes of the central mountain chain as
well as between the Divide and Rio Grande Valley.

Going into Monday and Tuesday, an impressive and broad 850-500mb
theta-e plume modeled between the Divide and east slopes of the
central mountain chain. Slow-moving storms capable of locally heavy
rainfall will again be a concern. At the same time, a weak
disturbance modeled to top the upper ridge on Monday before drifting
back to the south or southeast and over the area Tuesday- Tuesday
night. The 00Z GFS now trapping this feature over the area through
Wednesday while the ECMWF is less defined. Either way, Wednesday
appears to be a transition to what should be a drier/warmer pattern
to close out next week as the upper shifts back to the east and
builds slightly over NM Thursday through Saturday. But moisture
though trending downward in quality will remain sufficient for at
least isolated to scattered diurnal convection or we'll call it a
lower grade monsoon forecast. KJ

&&

.FIRE WEATHER...
There will be no significant fire weather concerns through the
forecast period. After a break in the convection Friday, things will
ramp back up this weekend. A back door cold front will bring a fresh
supply of low level moisture to the northeast today and over much of
the area Sunday. Showers and thunderstorms will be widespread both
days, with heavy rain likely and flash flooding a big concern. Not
much change is forecast through the first half of next week. Some
drying should take place later next week as high pressure to
the west tries to move over NM.  CHJ

&&

.ABQ WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch through late tonight for the following zones...
NMZ212>215-227>232.

&&
Hazardous weather outlook, Jul 31, 4:35 AM MDT, 9 hours 2 minutes before
Hazardous Weather Outlook
National Weather Service Albuquerque NM
435 AM MDT Sat Jul 31 2021

NMZ201>241-011045-
Northwest Plateau-Chuska Mountains-Far Northwest Highlands-
Northwest Highlands-West Central Plateau-West Central Mountains-
West Central Highlands-Southwest Mountains-
San Francisco River Valley-Tusas Mountains Including Chama-
Jemez Mountains-Glorieta Mesa Including Glorieta Pass-
Northern Sangre de Cristo Mountains-
Southern Sangre de Cristo Mountains-
East Slopes Sangre de Cristo Mountains-Upper Rio Grande Valley-
Espanola Valley-Santa Fe Metro Area-
Middle Rio Grande Valley/Albuquerque Metro Area-
Lower Rio Grande Valley-Sandia/Manzano Mountains Including Edgewood-
Estancia Valley-Central Highlands-South Central Highlands-
Upper Tularosa Valley-South Central Mountains-
Johnson and Bartlett Mesas Including Raton Pass-
Far Northeast Highlands-Northeast Highlands-Union County-
Harding County-Eastern San Miguel County-Guadalupe County-
Quay County-Curry County-Roosevelt County-De Baca County-
Chaves County Plains-Eastern Lincoln County-Southwest Chaves County-
San Agustin Plains and Adjacent Lowlands-
435 AM MDT Sat Jul 31 2021

This hazardous weather outlook is for portions of north and central
New Mexico.

.DAY ONE...Today and Tonight

Scattered to numerous thunderstorms are expected today through the
overnight. Storm motions will be slow and rainfall could become
heavy. This may lead to localized areas of flash flooding,
especially over and near recent and older burn scars. Isolated
locations may receive up to 2 inches of rainfall. A few storms may
also produce small hail and wind gusts to 50 mph.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

A significant increase storm coverage and flash flood potential can
be expected Sunday into Monday, especially between the Continental
Divide to the high plains of eastern New Mexico. Storm motions will
be slow and rainfall could become intense at times. This may lead to
localized areas of flash flooding, especially over and near recent
and older burn scars. Isolated locations may receive up to 2 inches
of rainfall. A few storms may also produce small hail and wind gusts
to 50 mph.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rainfall amounts and any flooding
through the National Weather Service Albuquerque web site at
weather.gov/abq or by calling 1.888.386.7637.

41

In the hours before

Special weather statement, Jul 31, 1:37 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Albuquerque NM
137 PM MDT Sat Jul 31 2021

NMZ228-230>232-312000-
Eastern San Miguel County-Far Northeast Highlands-Harding
County-Union County-
137 PM MDT Sat Jul 31 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SAN MIGUEL...
HARDING...WEST CENTRAL UNION...EASTERN MORA AND SOUTHEASTERN COLFAX
COUNTIES UNTIL 200 PM MDT...

At 137 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 17 miles northwest of Ute Lake State Park to 12
miles southeast of Springer. Movement was southwest at 20 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Wagon Mound, Roy, Mosquero, Abbott, Bueyeros, Chicosa Lake State
Park, Solano, Mills, Bell Ranch and Yates.

This includes Interstate 25 between Mile Markers 388 and 402.

&&

LAT...LON 3527 10379 3574 10438 3578 10438 3578 10443
      3610 10484 3643 10430 3600 10359
TIME...MOT...LOC 1937Z 043DEG 17KT 3557 10369 3620 10449

33

The office that day

Everything else NWS Albuquerque, NM issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 30, 7:44 PM MDTFlash Flood WatchABQColfax, Harding, Mora, Rio Arriba, San Miguel, Santa Fe and 2 more30 hr
Jul 31, 12:24 PM MDTAreal Flood AdvisoryABQRio Arriba, Sandoval3 hr
Jul 31, 12:53 PM MDTFlash Flood Warning Considerable damage threatABQMora3 hr
Jul 31, 1:03 PM MDTAreal Flood AdvisoryABQTaos117 min
Jul 31, 1:13 PM MDTAreal Flood AdvisoryABQHarding, Union3 hr
Jul 31, 2:02 PM MDTAreal Flood AdvisoryABQSanta Fe118 min
Jul 31, 2:12 PM MDTAreal Flood AdvisoryABQLincoln3 hr
Jul 31, 2:24 PM MDTSpecial Weather StatementABQMora36 min
Jul 31, 3:13 PM MDTFlash Flood Warning Considerable damage threatABQSandoval, Santa Fe3 hr
Jul 31, 3:24 PM MDTAreal Flood AdvisoryABQHarding3 hr
Jul 31, 3:26 PM MDTAreal Flood AdvisoryABQHarding, San Miguel3 hr
Jul 31, 3:32 PM MDTAreal Flood AdvisoryABQColfax3 hr
Jul 31, 3:42 PM MDTFlash Flood Warning Considerable damage threatABQSan Miguel3 hr
Jul 31, 4:04 PM MDTFlash Flood Warning Considerable damage threatABQHarding3 hr
Jul 31, 4:26 PM MDTAreal Flood AdvisoryABQSan Miguel3 hr
Jul 31, 5:37 PM MDTSpecial Weather StatementABQTorrance23 min
Jul 31, 5:48 PM MDTAreal Flood AdvisoryABQGuadalupe3 hr
Jul 31, 5:58 PM MDTAreal Flood AdvisoryABQColfax3 hr

Nearby

Special Weather Statements in New Mexico, 2021Every special weather statement 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.