Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 38, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 14, 2001, 2:44 PM MST for Coconino County, Arizona. It was in force for 31 min. 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
- Jul 14, 2001, 2:44 PM MST (21:44 UTC)
- Expired
- Jul 14, 2001, 3:15 PM MST
- In force
- 31 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Coconino County, AZ
The radar
The Cedar City radar (KICX), 90 km from the middle of the area, began a volume at 21:48 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 12:00Z, 9.7 hours before the alert went out and 190 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
- 431 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 1713 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 142150 SVRFLG AZC005-142215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 244 PM MST SAT JUL 14 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN COCONINO COUNTY IN ARIZONA * UNTIL 315 PM MST * AT 244 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 18 MILES SOUTHWEST OF FREDONIA...OR ABOUT 21 MILES SOUTHWEST OF KANAB...MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... 5 MILES SOUTHEAST OF FREDONIA AT 310 PM MST IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WINDS IN EXCESS OF 58 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3682 11284 3657 11271 3678 11218 3705 11246
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 Jul 14, 2:30 PM MST, 14 minutes earlier.
Area forecast discussion, Jul 14, 2:30 PM MST, 14 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SAT JUL 14 2001 .SYNOPSIS...EXPECT SHOWER AND THUNDERSTORM ACTIVITY TO PERSIST THROUGH THE COMING WEEK. A SLIGHT SHIFT IN THE UPPER WIND PATTERNS WILL RESULT IN A MINOR DECREASE IN SHOWER AND THUNDERSTORM ACTIVITY OVER THE WEST SUNDAY THROUGH TUESDAY. VERY LITTLE CHANGE IN ACTIVITY IS EXPECTED FROM FLAGSTAFF EASTWARD. BY WEDNESDAY...MOISTURE LEVELS WILL BEGIN TO SLOWLY INCREASE...WITH SHOWER AND THUNDERSTORM ACTIVITY RETURNING TO MUCH OF THE REGION. .DISCUSSION...STRONG HEATING COMBINED WITH SOME MID TO UPPER LEVEL FORCING AND A BIT OF SHEAR HAS MADE FOR AN ACTIVE DAY TODAY. EXPECT THIS FORCING TO END THIS AFTERNOON OR EVENING AS THE SHORTWAVES RESPONSIBLE MOVE AWAY FROM THE AREA. TROUGH OFF THE WEST COAST WILL STRENGTHEN A BIT THROUGH AT LEAST MONDAY...PROVIDING SEVERAL DAYS OF SOUTHWEST FLOW. WILL NOT DRY THINGS OUT AS FAST AS MODELS WOULD LIKE...BUT WILL SHOW A DRYING TREND NEXT FEW DAYS OVER THE WESTERN ZONES. BY DAY FOUR...WEST COAST TROUGH WILL RELAX A BIT AND EXPECT THE MOISTURE BOUNDARY TO MOVE BACK WESTWARD. THE WESTWARD PUSH WILL NOT BE ANYTHING GREAT...BUT JUST ENOUGH TO MENTION CHANCE POPS AGAIN IN THE WESTERN ZONES. THE EASTERN ZONES ARE NOT LIKELY TO HAVE A DRYING TREND AT ALL DURING THIS FORECAST PERIOD. PETERSON. .FGZ...NONE.
In the hours before
Special weather statement, Jul 14, 9:00 AM MST, 5 hours 44 minutes before
AZZ004>018-037>040-141930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST SAT JUL 14 2001 ...SCATTERED TO NUMEROUS THUNDERSTORMS EXPECTED ACROSS NORTHERN AND CENTRAL ARIZONA TODAY... EXPECT AN AREA OF SHOWERS AND THUNDERSTORMS OVER THE KAIBAB PLATEAU AND LAKE POWELL TO MOVE NORTH INTO UTAH THIS MORNING. ELSEWHERE...A SUNNY START TO THE DAY WILL MEAN AN EARLIER START TO CONVECTIVE ACTIVITY. SLIGHTLY DRIER AIR OVER THE WESTERN PORTIONS OF THE STATE WILL MEAN THE MOST WIDESPREAD ACTIVITY CAN BE EXPECTED MAINLY EAST OF FLAGSTAFF. THE BEST CHANCE FOR STORMS TODAY WILL BE ALONG AND NORTH OF THE EASTERN MOGOLLON RIM AND WHITE MOUNTAINS. DUE TO STRONGER HEATING FROM THE SUNSHINE THIS MORNING...THE POTENTIAL EXISTS FOR STORMS THAT DO DEVELOP TODAY TO BE STRONGER THAN THE STORMS EXPERIENCED ON FRIDAY. THE PRIMARY THREAT TODAY WILL BE BRIEF HEAVY RAINFALL AND STRONG...GUSTY WINDS. SOME SMALL HAIL WILL OCCUR WITH THE STRONGER STORMS. MOST STORMS WILL MOVE TOWARDS THE NORTH OR NORTHEAST TODAY. SPOTTER REPORTS OF EXCESSIVE RAINFALL AMOUNTS AND SEVERE WEATHER SHOULD BE RELAYED TO THE NATIONAL WEATHER SERVICE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 3:13 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 32 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2001Every severe thunderstorm warning in 2001
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.