Alert archive / Arizona / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 1, NWS Flagstaff, AZ

March 28, 2000Yavapai County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Mar 28, 2000, 5:55 PM MST for Yavapai County, Arizona. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 28, 2000, 5:55 PM MST (00:55 UTC)
Expired
Mar 28, 2000, 6:30 PM MST
In force
35 min
Issued by
NWS Flagstaff, AZ
Area
Whole counties

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 00:58 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.9 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, Flgstf/Belemont, AZ at 00:00Z on 2000-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 85 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2000-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.193958Sfc1 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
85 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
839 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KFGZ 290106 COR
SVRFLG
AZC025-290130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
555 PM MST TUE MAR 28 2000

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN YAVAPAI COUNTY IN CENTRAL ARIZONA

* UNTIL 630 PM MST

* AT 555 PM MST...  NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A SEVERE THUNDERSTORM 9 MILES WEST OF CAMP VERDE...
  MOVING SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CAMP VERDE AT 615 PM MST

STRONG DAMAGING WINDS AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

KM

NNNN

What forecasters said that day

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

NWS Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 28, 2:46 PM MST, 3 hours 9 minutes earlier.

Area forecast discussion, Mar 28, 2:46 PM MST, 3 hours 9 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
300 PM TUE MAR 28 2000

SYNOPSIS...RAIN AND HIGH ELEVATION SNOW SHOWERS...ALONG WITH
ISOLATED THUNDERSTORMS...WILL CONTINUE THROUGH THIS EVENING WITH
SHOWER ACTIVITY DECREASING OVERNIGHT. SEVERAL WEAK DISTURBANCES WILL
MOVE ACROSS THE STATE OVER THE NEXT FEW DAYS AND WILL BRING A CHANCE
FOR SHOWERS EACH DAY. HIGH PRESSURE WILL BEGIN A DRYING AND WARMING
TREND BY THE WEEKEND.

DISCUSSION...LOW PRESSURE SYSTEM ALOFT HAS MOVED INTO CENTRAL NM
DURING THE DAY. DEEP MOISTURE AND LOW CLOUDS COVERS MUCH OF THE
STATE THIS AFTERNOON WITH AREAS OF LIGHT RAIN AND MOUNTAIN SNOW
SHOWERS...AND A FEW THUNDERSTORMS...CONTINUING. FLOW ALOFT HAS
BECOME WEAK ON THE NORTH SIDE OF THE NM CIRCULATION WITH A
WELL-DEFINED DEFORMATION ZONE PRESENT OVER CWFA. NEXT WAVE UPSTREAM
IS ALREADY MOVING INTO THE CWFA THIS AFTERNOON WITH AN INCREASE IN
WINDS ALOFT AND STEEPENING THE LAPSE RATES SLIGHTLY. LI'S ARE IN THE
-2 TO -4 RANGE THIS AFTERNOON AND WILL REMAIN UNSTABLE INTO THE
EARLY EVENING HOURS. THUS...EXPECT SHOWERS AND THUNDERSTORMS TO
PERSIST FOR AT LEAST A FEW HOURS INTO THE 1ST PERIOD. RUC AND ETA
SIMILAR IN THIS FEATURE AND INDICATE THAT PRECIP ACTIVITY WILL
DIMINISH THIS EVENING FROM WEST TO EAST...BUT PROBABLY NOT END
COMPLETELY...ESPECIALLY IN THE NE ZONES.

ETA AND AVN CONTINUE TO EXHIBIT BROAD CYCLONIC TROUGH DEVELOPING
OVER THE SOUTHWEST THROUGH 4TH PERIOD. THIS WILL LIKELY KEEP TEMPS
NEAR OR BELOW SEASONAL NORMALS AND MAINTAIN A CHANCE OF SHOWERS EACH
DAY.

EXTENDED...ECMWF...MRF...AND CDN MODELS VERY SIMILAR IN ALLOWING
CLOSED LOW TO SAG TO THE SOUTHWEST DURING THE EXTENDED PERIOD.
DIFFERENCES ARISE AS TO HOW FAR TO THE SOUTHWEST IT WILL GO...WHEN
IT WILL EJECT...AND TRAJECTORY OF SYSTEM WHEN/IF IT EJECTS. FOR NOW
WILL GO WITH UNSETTLED WEATHER ON DAY 3 AND DECREASE CLOUDS WITH
WARMING TEMPERATURES ON DAYS 4 AND 5.  DB.

.FGZ...NONE.

The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 28, 6:30 PM MSTSevere Thunderstorm WarningFGZYavapai40 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000

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.